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Toshiki TAKEI
Article type: Article
Pages
195-196
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In the past, virtual prototyping technologies simply did not deliver the right answers in time to impact the ongoing design process. Very often, CAE has been used for design verification and has run almost outside the process - not as a proactive design optimization tool. Raw processing speed has not been the real bottleneck. The fundamental problem lies with the lack of accurate system-level prediction technologies and with the sheer number of different software tools that are in use at many companies today. A lot of time is lost in non value-added engineering effort - dealing with many barely compatible software tools for just one attribute at a time, transferring data from one environment to another, rebuilding models, and remeshing.
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Hiroshi Kawakami
Article type: Article
Pages
197-198
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Recently, 3D-CAD must be in a product design. As it spreads, the CAE software for designers has attracted attention. In this paper, it introduces about the CAE software which a designer should use by using CAD integrated electromagnetic field analysis software "JMAG-Designer".
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Hiroshi NIIZEKI
Article type: Article
Pages
199-200
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper describes the renovated version of PAM-CRASH that is the crash analysis software based on the finite element method and the explicit time integration scheme. The contents of the renovation consists of three points : (i) software architecture renovation. (ii) practical DMP (Distributed Memory Parallel) solution. (iii) new failure criteria for material and spot. The software architecture renovation realizes the complete memory allocation and the single source code for SMP (Sheared Memory Parallel) and DMP. The DMP version provides the user the practical solution of the huge crash model. The new failure criteria enhance reproductiveness or predictiveness of the material behavior. PAM-CRASH V2002 is the second generation of the crash software.
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Yasuhiro Tanaka, Keiji Kudo, Takehiko Kato
Article type: Article
Pages
201-202
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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The next-generation system of iSIGHT, which is the pioneer of integration, automation and an optimization system, has been developed based on FIPER project. For this system, a newly developed architecture of FIPER (Federated Intelligent Product EnviRonment) project, founded by NIST (National Institute of Standards and Technology) and composed of manufacturing companies, universities, and software vendor, is reflected and will offer the new infrastructure for a collaborative engineering. This paper explains the outline of this attractive development project.
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Hikari MUKAI
Article type: Article
Pages
203-204
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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It is well known that psychoacoustical parameters, such as Loudness, Sharpness, Roughness are based on human hearing system. But the actual calculation algorithms of these parameters are very complex. In this paper, the calculation method of psychoacoustical parameters is introduced with examples of analysis using these parameters.
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Hideto TAI
Article type: Article
Pages
205-206
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper focuses on an example of Fluid-Structure Copupling problem application by RADIOSS. RADIOSS is being developed by MECALOG S.A.R.L. (France). This code is based on Explicit time integration FEM and used for structural crash impact problem widely in the world, but has unigue functionality for the fluid-structure copuling problem.
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Osamu GOTOH, Haedar N. TUBAGUS
Article type: Article
Pages
207-208
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Prompt by the recent economical reasons and the progression of computational technique, numerical simulation has been a powerful toll to understand the manufacturing process in rubber and polymer industry. Valuable comparative evaluations with the experimental results were reported and the direct integration of the numerical simulation in manufacturing increases especially in the extrusion process. For several years, the authors have been concentrating the numerical research in this field by using Finite Element Method. This article reports industrial applications of the FEM based viscoelastic commercial code, POLYFLOW.
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Morio MITSUISHI, Ytaka NAGAO, Changmin SONG, Changsub KIM
Article type: Article
Pages
209-210
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper presents how an FEA model using MSC.NASTRAN was developed to simulate dehydration dynamics of a washing machine with spinning basket rotating about vertical axis. Gyroscopic effect, centrifugal forces, and self-balancing mechanism (liquid balancer) associated with rotating structures were considered in the simulation. Using the model, frequency response analysis was performed to simulate response of non-rotating structures in operating test. Static analysis was performed to simulate strain and stress of rotating structures at a discrete operating speed. The model was validated successfully with operating test data measurement. This paper also presents how the operating test was performed to understand dynamics of the dehydration process. The test was performed by installing an unbalance mass to the spinning basket based on manufacturer's design standard.
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Kumi AOKI, Takashi KOBAYASHI, Seiji HAGA, Tetsurou OGUSHI
Article type: Article
Pages
211-212
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Recently, Computational Fluid Dynamics (CFD) is a fundamental tool for thermal designer of electronic equipment. However, there are some problems related to the difficulty of modeling and computational time for applying the CFD to the thermal review at an early design stage. Then we developed a thermal tem plate system using Nodal Network Method (NNM), which made possible to review the thermal problem in a short time. In this paper, we applied this approach to the thermal design of a large-size closed cabinet, and showed the practicality and effectively of our method. Designer can change each analysis parameter by himself by editing the template GUI, and can predict the thermal distribution of the product before making the proto-type.
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Haruo ISHIKAWA, Rie Matsuura
Article type: Article
Pages
213-214
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Unit design is one of the important methodologies to overcome environmental problems. There are some objects for using the methodology. The method how to construct units with multiple objects is proposed. The proposal is based on similarity factor of the presented unit design with objects to its ideal cases, applying to QFD approach.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
Pages
215-216
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In design process, not one characteristic but are multiple characteristics should be offten considered. If all of the characteristics have no correlation each other, design problem would be very easily solved, however, in most of actual cases, there are significant correlations between those design characteristics and it makes design review difficult. Such kind of problem has been studied as Multi-Criteria Decision Making (MCDM) or Multi-Objective Programing (MOP) by researchers and have not been perceived as general tools for designers. Nowadays, however, such kind of tasks to meet several conflicting design/production requirements became common due to heigh product requirements. And design tools, which enable designer to perform MCDM or MOP in their usual design tasks, are desired. iSIGHT is a MDO (Multi-Disciplinary Optimization) software system developed by Engineous Software Inc. and has numbers of practical applications in design optimization problems. This paper introduces current functions and recent development efforts on MCDM and MOP in iSIGHT.
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Tadaaki MARUYAMA, Kazuhiro AOYAMA, Shoji TAKECHI, Yuji KADO
Article type: Article
Pages
217-218
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In order to develop and design a satellite considering a global competitiveness, it is indispensable to clear off the wall (the barrier to design) between the design areas in a satellite design, and to improve a new design environment in which designers can manage and organize the satellite information. In this research, to free the barrier to design between designers, the authors propose the smart master model of a satellite that can integrate with a few analysis systems in a satellite design. These analysis systems are the orbit calculation, thermal analysis, and structural analysis, etc. The authors have developed the integrated design environment for satellite in which designers can trial-and-error designing and evaluating instantaneously.
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Haruo ISHIKAWA, Yoon Eui NAHM
Article type: Article
Pages
219-220
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Many of today's products are so complex that no single company has all the necessary knowledge about either the product or the required processes to completely design and manufacturing. The customer-supplier relationship has undergone substantial transformation over the past 30 years, from a traditional relationship centered largely on the customer towards a current focus on partnership and lean supply. Some of the benefits of Early Supplier Involvement (ESI) in New Product Development (NPD) process include : reduced development cost; higher quality with fewer defects; reduced time to marker; supplier-oriented innovation; and so on. This paper discusses the strategic integration between customer and supplier in NPD process. We typify the customer/supplier collaborative activities in NPD process. Then, an implementation perspective for realizing computer-supported ESI in NPD process are presented, based on our ANetCoDE which is a hybrid multi-agent architecture for distributed collaborative engineering environment. Some key features are discussed, including collaborative specification establishment, solid model-based communication and agent-based collaboration through the medium of "guest agent" and "site agent".
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Tatsuro SAWADA, Takuya TSUNEISHI, Haruo SAKAMOTO
Article type: Article
Pages
221-222
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper describes an interim report of design collaboration in a laboratory in the development of wind power generators. The development of wind power generators has been performed in our laboratory. However, this trial project has not been collaborative because individual works their design from their idea. We started to pay attention to design collaboration in our laboratory by a collaboration software. We aim to utilize the design collaboration technology in the development of wind power generators.
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Kazuhiro AOYAMA, Shoji TAKECHI, Toshiharu NOMOTO, Masami SUGIYAMA
Article type: Article
Pages
223-224
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Rencently, a designer demands the design supporting system with management of design knowledge. Although the definition and modeling of knowledge are very difficult, it is important to manage the past design process and the past product information. Authors have been developing the top down oriented design system that supports design from the concept design to the detailed design. In this system, the network model of entities and attributes, that express the product information, is grown up in proportion as stepwise design. This paper proposes the framework for the use of information on the past design process and product in this system. The system functions of copying the partial network and joining it with other networks are represented as managing of the design knowledge.
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Hironobu KOMEDA, Masataka YOSHIMURA, Kazuhiro IZUI
Article type: Article
Pages
225-226
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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As current product design processes tend to be distributed across numerous technical fields, it has become increasingly difficult for the detailed design arising in each field to preserve the early overall design concepts that ideally should be incorporated in the final product. This paper proposes a collaborative decision method that achieves these kinds of product development targets. First, complicated relationships between product criteria and design variables are approximated with quadratic polynomials using the Response Surface Method. Influences of design variables with respect to criteria are calculated from the equation results, and are applied to estimates provided by enterprise sections such as design units, research teams, and so on, to achieve a clear and detailed picture of potential product performance. Based on these estimated relationships, all sections can offer more effective design alternatives and predict the product performance. Moreover this method can also predict and evaluate the development costs required to achieve a range of development goals.
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Ningfeng Yang, Masataka YOSHIMURA, Kazuhiro IZUI
Article type: Article
Pages
227-228
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper discusses an advanced collaborative system that considers the constraint relationships among design criteria. In real design environments, design criteria frequently change, causing optimization difficulties and inefficiencies. This paper presents a newly developed optimization technique based on Hierarchical Genetic : Algorithms (HGA) that is integrated with several additional modules, enabling the smooth optimization of dynamic problems in which design criteria frequently change. An equally important issue is the presentation of necessary design information output to decision-makers. This paper discusses the use of the proposed system to create design constraint condition graphs that are presented to decision-makers during the optimization process, enhancing system development productivity.
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Juhachi ODA, Tomonori YUASA, Mitsuhiko TAKA, Kazumasa NIWA
Article type: Article
Pages
229-230
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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The functional object manufactured in one continuity is called as the functional continuum. In this paper, the technique using a slit to create the functional continuum is studied. The dynamic response of beam introducing a slit is analyzed by the FEM. The technique adjusting the micro-displacements in the X-Y stage of a microscope using the slits is presented.
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Toru KAINO, Takuya TUNEISHI, Masashi NISIUCHI, Haruo SAKAMOTO
Article type: Article
Pages
231-232
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This report describes design and manufacture of a small-sized electric vehicle for elderly drivers. The final aim of this research is the drive control of the vehicle. At this moment, the vehicle was almost accomplished, using the direct current motor and Li-ion batteries. Ultra-sonic sensors, wireless LAN, camera image analyzer will be used to support the elderly driver's driving ability, and will provide the transportation method with safety in mountainous areas.
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Takashi UCHINO, Haruo SAKAMOTO, Sachiko MIGIWA, Yuusuke MARUYAMA, Tosh ...
Article type: Article
Pages
233-234
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This report describes the development of small-sized wind power generators. The characteristics of the generator are rare-earth permanent magnets and core-less coils. We performed the wind tunnel experiment using the generator and Gyroscope-type wings. After obtaining the experimental results, some analytical works using IEM (Integral Element Method) software on dynamic magnetic field ware performed. We aim to obtain the way to the best design for the generator from experimental and analytical studies.
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Tomohiro KUROTOBI, Tetsuro URUSHIMA
Article type: Article
Pages
235-236
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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The East Japan Railway Company has begun operating Chuo Line trains where seats in all cars are reserved. This reflects the diversifying needs of the railway's customers. To go with this, it has also created an online system for selling reserved seats in real time. In this paper I will primarily discuss the reserved seat ticketing machines the East Japan Railway Company has installed on its platforms. Two major points concerning this development will be discussed : 1) assuring system reliability and 2) improving processing speed. The system uses a networks to sell reserved seats and during its development the researchers emphasized real-time processing when they addressed system and equipment quality improvement. In the first month of operation 100,000 such tickets were sold, and response from customers has been favorable.
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Yutaka Ishii, Tomio Watanabe
Article type: Article
Pages
237-238
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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The embodied virtual communication system provides two remote talkers with the communication environment sharing the embodied interaction through VirtualActors including themselves in the same virtual face-to-face scene. In this paper, we perform the communication experiment using the system under three conditions of free conversation, one-way speech and one-way speech using the scene in which the head motion of listener's Virtual Actor is inconsistently stopped. It is found that the cross-correlation between the talker's voice and listener's head motion in the inconsistent condition decreases at the significance level of 1% in comparison with the normal representation, which demonstrates the importance of talker's head motion in embodied communication. The result also demonstrates that the embodied virtual communication system is effective in the analysis by synthesis of embodied communication.
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Takeshi SHINTOKU, Tomio WATANABE
Article type: Article
Pages
239-240
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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VirtualWave (VW) is an abstracted avatar in which human head motion is simplified as the rhythmic motion of a wave to clarify an essential interaction and communication. By using 3VWs, the embodies virtual face-to-face communication system is developed for three human interaction analysis by synthesis. The system provides networked virtual communication environment in which three remote talkers can share embodied interaction by observing their interaction of VWs including themselves in the same virtual space. The effectiveness of the system is demonstrated in 7 groups, 3 talkers per group by the sensory evaluation of the remote communication experiment as the roles of a speaker and the other two listeners.
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Ikumi Murakami, Ryusei Danbara, Tomio Watanabe
Article type: Article
Pages
241-242
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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InterActor is the speech driven embodied entrainment character with communicative motion and action of speaker and listener for activating human interaction. In the role-playing of a patient and a nurse by students who belong to Department of Nursing, the communication effects of InterActor are evaluated in comparison with only voice communication and face-to-face communication for the application of InterActor to nursing. Sensory evaluation demonstrates that communication through InterActor is evaluated higher than only voice communication in the role of patient while it is almost the same effect in the role of nurse, and it is evaluated lower than face-to-face communication.
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Toichi SAWADA, Noriko OKURA, Yasushi KERA
Article type: Article
Pages
243-244
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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A blind spot may be formed only with the information on the sight although most of the information for the save driving is getting from the sight. This paper describes the auditory information presented by the dangerous matter existed in the circumference of driver throughout the virtual reality and the fundamental item that aims at the construction of the support system that aids a vision or sight. From the results of the study, the high direction discrimination ability of a subject could be confirmed by an experiment toward the image moved that imitation did a dangerous matter. Furthermore, when a subject perceived most as the change of a image to the velocity, it determined that the change rate of the angle and the sound pressure is important.
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Toichi Sawada, Daisuke Hanzawa, Shinnosuke Ishida, Jun Tanaka
Article type: Article
Pages
245-246
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This study deals with the influence which the degree of devotion of the driver using the steering assistance system has on manual steering after the system stop. In this experiment, the course which imitated the highway by the driving simulator. The driver is run using the steering assistance system. The system stops after that and the driver makes a lane change. In this analysis we compared the driver vehavior in this case with the case where the system is not used. Consequently, the driver regained the feeling of steering promptly after the system stop, and vehicles did not depart from a lane. However, the driver behavior is better after the system stop when the degree of devotion to driving of the driver at the time of system operation is high.
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Shiroh ITAI, Yoshiyuki MIWA
Article type: Article
Pages
247-248
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In the co-creative activity, emergence of a co-exciting feeling and a co-sharing of context during all participants are important. In this study, changes in respiratory action and electromyogram during the match of the conventional Kendo robot system were measured. And a device (timing display device) was developed to transmit the interval between zero-cross points of the rhythm controller, as a force tactile sensation stimulus to the remote opponent in order to support the co-share of the timing. From the result, it was observed that there was a electromyogram at a level of ±0.5 [V] 0.2-0.3 [s] just before the swinging of the sword in the game-decision stage. And there's a possibility that the co-sharing of the timing (or Maai) between remote locates can be supported by sending physical signals, which are not related to your consciousness, to your opponent.
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Teruyoshi KOGURE, Hitoshi GOTOH, Shiroh ITAI, Yoshiyuki MIWA
Article type: Article
Pages
249-250
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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We have a feeling that the image obtained from the present information media such as television and the Internet is separated from the space where we are present now. It is because that feeling and atmosphere of those who are in an image can not be transmitted easily. Then, we developed two kinds of haptic interfaces which can express mental situation of persons between remote places. One is the haptic interface which can express change of breathing rhythm. The other is the haptic interface which aimed to express active act and passive feeling simultaneously. In the former, we acquired a prospect that the change of person's feeling is shared among many people simultaneously. In the latter, we contemplated principle to create togetherness that my own hand is wrapped in by other person's hand.
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Hisafumi EBISAWA, Akihiro OSAKI, Yoshiyuki MIWA
Article type: Article
Pages
251-252
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper describes a haptic device for Aerial Drawing through embodiment. We have studied the system that can draw freely in the air by the fingertip. And in the series of this study, it was reported that the location disparity between the virtual objects and the real fingertip may cause a sense of incongruity during drawing activities. In order to solve the problem, we developed the haptic device that applies force feedback to a fingertip under drawing and a few drawing experiments were performed using this device. As a result the sense of the disparity of the position sensation of the finger under drawing tends to become reduced. This result indicates the possibility of emerging a certain function to weaken this sense of incongruity.
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Satoshi KUBOKI, Masashi OKUBO, Tomio WATANABE
Article type: Article
Pages
253-254
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Collaboration consists mainly of two tasks; one is the treatment of individual task by each, the other is communication with each other. In our previous paper, it is indicated that the viewpoint from which the user can see the partner's avatar and his own avatar in the same virtual space is useful for smooth communication. However, the motion images including the user's own avatar might discourage him from shape evaluation. This paper investigates the influence of difference of two viewpoints; one is the viewpoint from which the user can see his own motions through the translucent avatar, the other is the viewpoint from which user can see only his forearms' motions, on shape evaluation in virtual space. The result indicates that the viewpoint from which the user can see only his forearms' motions in preferred for the shape evaluation in virtual space.
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Toshiya HIROSE, Toichi SAWADA, Yasuhei OGUCHI
Article type: Article
Pages
255-256
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In the case of driver assist systems that can be accepted by the driver, it need to make clear the control performance of the driver by the driver's model. This research did modeling of the decelerating action by the Fuzzy Neural Network (FNN). The input data divided the learning data and the non-learning data. It was learned only the learning data. The simulation of the decelerating action did about the non-learning data. As a result, it is possible for FNN to do the decelerating action that approximate to the driver's action.
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Tamotsu MURAKAMI, Koichi MIZUTOME, Akira MATSUDA, Syuji YUASA
Article type: Article
Pages
257-258
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper proposes a computerized method of industrial design aid by suggesting combinations of shape- and color-characteristics different from existing designs as hints for new design. First, feature indices to represent and quantify shape- and color- characteristics of industrial designs are mathematically defined. Then, the feature indices are calculated for an existing industrial design case obtained as 3-D CAD data or 3-D shape scanning data of real product. The calculated feature indices represent the design case in a feature index space. By collecting such feature index vectors for existing design cases and finding new points in the space which are as far from any of the existing vectors as possible, new combinations of shape- and color- characteristics different from existing designs should be obtained. Also, computational method of generating and visualizing 3-D shape examples that have specified shape- and color feature indices is introduced. The proposed method is implemented as a program using simulated annealing and applied to designs of "card stands".
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Takuya TSUMURA, Hisashi SERIZAWA, Hidekazu MURAKAWA, Kiyoshi NOGI
Article type: Article
Pages
259-260
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper introduce a new database system which facilitate that various user utilize a professional knowledge of welding and joining technology as a resources. The system based on knowledge management is examined in order to make the best use of the knowledge. As the result of this examination, the conclusion is obtained that a web application, which have presentation logic for each skill and have a function that the skill information is updated based on record of operation, with the database of professional knowledge, skill information for each user, and relation of each knowledge is the most effective to construct such kind of system. As the examples of the application, intelligent database for a papers concerning welding and joining technology on above conclusion is developed.
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Shigehiko Kaneko, Tatsuo Watanabe
Article type: Article
Pages
261-262
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In this paper, a new approach for design technology tradition of mechanical engineering field in university laboratories is introduced. We recently started an activity to produce exploded view of home made experimental apparatus for explaining design policy and know how of the experiments. Background, procedure, process and an example is introduced in detail. Finally, a good lesson during the course of such activity is summarized.
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Teruaki ITO, Akihiro MYOUKEN
Article type: Article
Pages
263-264
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This study focuses on earlier stage of bicycle design using intuitive operation without spending too much time to understand how to operate. A designer reviews a conceptual design from several perspectives in a non-sequential fashion an achieve the final design. The system also enables the designer to evaluate the design using computer graphics images, and redesign the idea if necessary. The paper presents the basic idea for the approach and shows some of the example for the operation.
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Masao ARAKAWA, Takateru MATSUNAGA, Hiroyuki KITAJIMA, Takahiro MORINIS ...
Article type: Article
Pages
265-266
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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It is often said that it might be very important to take Kansei, some kind of human sensuous inspiration, into account of design. And it becomes more and more important especially in the design of products whose functions are saturated and it becomes difficult to gain competitive power only by adding a new function. In those cases, it is difficult to gain competitive power by discounting its prices nor making efforts in human engineering sense of ease in handling. In such cases, visual design will be more important, so that visual designers become key of success in the product. However, Kansei design used to be based on questionnaires to the customers, and it is basically based on putting emphasis on the greatest common of them. But, in most of cases visual designers would like to show their feelings into design and lead majority to his or her sense. So that Kansei design database is often useless to them and it is sometimes obstacle for their creativity. In this paper, we will propose the Kansei design system which is based on image processing system and qualifying image by using Fourier transform and make up a new visual design by using those Fourier transform data. As an example, we have used the proposed system in design of doors. We have verified the results by inspiration test and brain test and showed a possibility of the proposed method.
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Shuichi FUKUDA, Tatsuya KIKUCHI
Article type: Article
Pages
267-268
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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The objective of this study is to investigate a remote laboratory on electric motors using high-speed networks between Japan and the U.S. A client situated at Stanford University (California, U.S.A) accessed the remote lab system set up in Japan. Through this client, the remotely located user operated the motors and conducted experiments. The remote lab was conducted over a high quality digital video conference system, making it possible for both sides to communicate smoothly with each other, and for the remote user to observe close-up details of the lab including the motor's fine movements. Using a network bandwidth of 15-30 Mbps, the authors were able to demonstrate the validity of the remote lab experiment.
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Shuichi FUKUDA, Akinobu FUKUZAKI, Vlaho KOSTOV
Article type: Article
Pages
269-270
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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Tokyo Metropolitan Institute of Technology started to join the postgraduate design course ME210/ME310 at Stanford from the year 1998 by using a network. This course in run based on Project Based Learning. ME210 is a preparatory course for ME310,which is focused upon teaching students how to work together as a team and which was run from September to December, 98. An assignment of developing a paper bike was given. Three students formed a team on each side and they collaborated over the network alone. ME310 is a course with corporate partners. Corporate partners provides students real issues in their companies and students work together to solve the problem and to develop a prototype that demonstrates how effective their solutions are. In our case, Toyota provided an assignment to develop a parallel parking support system and they asked us to demonstrate its usefulness on a real car. How we could get over the cultural differences and how we could really achieve good teamworking across the national boundaries over the network will be discussed.
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Shuichi FUKUDA, Hideyoshi YANAGISAWA, Tatsuya KIKUCHI
Article type: Article
Pages
271-272
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
CONFERENCE PROCEEDINGS
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Tokyo Metropolitan Institute of Technology joined the postgraduate design course ME310 at Stanford during 99 and 00 by using a network. This course is run based on Project Based Learning. During these years., Toyota as one of the corporate partners in ME310 provided the students with an assignment to develop a car multimedia user interface. Stanford and TMIT teams worked together and developed a virtual button system. parallel parking support system and they asked us to demonstrate its usefulness on a real car. In this class, TMIT and Stanford teams shared the idea, but they realized te different systems.
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Shuichi FUKUDA, Ayami EJIRI, Fumikazu KONISHI
Article type: Article
Pages
273-274
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
CONFERENCE PROCEEDINGS
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This report describes global PBL course of design which was shared over the network between Tokyo Metropolitan Institute of Technology and Stanford University during the years 2000 and 2001. The assignment during this period was to detect the dangero us conditions of a driver. TMIT and Stanford team studied several methods for detecting physiological conditions of a driver as well as detecting dangerous body movements. As the former needs too expensive equipments, both teams came up with the feasible objective of detecting dangerous movements of a driver. Although the goal is coordinated and is the same between TMIT and Stanford teams, they developed different systems.
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Shuichi FUKUDA, Charles MBOHWA, Ayami EJIRI, Manabu ISHII
Article type: Article
Pages
275-276
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
CONFERENCE PROCEEDINGS
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The network shared design class activities with Stanford University during the years 2001 and 2002 are described. One of the deliverables from the activities during these years is the overview of the status quo of the present technologies associated driver friendly interactive interface, which assignment was given by our corporate partner Toyota Motor. Investigations were carried out on browser information systems, how we can make inputs using voice, how we can communicate with an external server, and how we can retrieve text information as an output to speech. And another deliverable was a prototype system to detect drivers's emotional conditions by of voice.
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Kazuhide KAMIYA, Takashi NOMURA, Shinta HIDAKA, Hatsuzou TASHIRO, Masa ...
Article type: Article
Pages
277-278
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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A simple common path interferometer is proposed to measure displacement of a specular object. The interferometer consists of a focusing lens, a beam splitter, a plane mirror and the specular object. Interference fringes obtained by the interferometer are straight lines with the equal interval if there is no aberration of the focusing lens. As both optical path in the interferometer are symmetrical, only effect of a coma aberration is contributed for the formation of the interference fringe, even if there are many aberration in the focusing lens. An interval of the interference fringe narrows in proportion to an absolute value of the displacement of the specular object. The displacement is obtained by analyzing the interval of the interference fringe. The experiments were carried out in order to confirm the validity of the proposed interferometer. When the displacement of 10nm amplitude was given at 1Hz, the displacement was detected by the proposed interferometer.
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Yoshikazu ARAI, Wei GAO, Hiroki SHIMIZU, Satoshi KIYONO, Tsunemoto KUR ...
Article type: Article
Pages
279-280
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
CONFERENCE PROCEEDINGS
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A technique for calibrating the profile error of the probe sphere of a contact-type displacement probe for on-machine measurement of aspherical profiles in nanometer accuracy was proposed. A sphere workpiece with unknown profile error is used as the sample for calibration. The workpiece, which is mounted on the machine spindle and is rotated by the spindle, is measured by the displacement probe. At each position of the probe, the profile of the workpiece over one rotation are sampled by the probe. An average of the data removes the influences of the workpiece profile error and the spindle error, resulting in on accurate measurement of the profile error of the probe sphere. Calibration of the whole probe sphere can be realized through moving the probe over the workpiece. Experiments of on-machine profile measurement of an aspherical lens were carried out after calibration of the probe sphere.
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Masato AKETAGAWA, Pongpun RERKKUMSUP, Koji TAKADA
Article type: Article
Pages
281-282
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In this paper, we propose an absolute length measurement method with sub-nanometer accuracy by combining a regular crystalline lattice with a scanning tunneling microscope (STM) and the phase modulation homodyne laser interferometry. An arbitrary length can be determined using fine scale (=lattice spacing on crystalline surface) and coarse scale (=wavelength). With the method, an arbitrary length can be represented as Nλ+Md, where N and M are integer, λ is the wavelength and d is the lattice spacing. The phase modulation homodyne laser interferometry can determine the length of interest with picometer resolution, when the optical path difference is the wavelength times integer. The length shorter than the wavelength can be determined using the regular crystalline surface and STM. For the preliminary experiment, the measurement instrument for lattice spacing on crystalline surface was developed and evaluated.
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Akinori SAITO, Satoshi KOGA, Kazuhiko HIDAKA
Article type: Article
Pages
283-284
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper presents a new micro-roughness measuring probe which uses a longitudinal tapping mode by an ultrasonic vibration sensor. The sensor controlled by a measuring force control system including a fine and a coarse servo driving mechanism realize non-destructive, accurate and rapid measurement. The measuring force is 0.3μN-750μN, and the two servo driving mechanisms realize a quick response and wide measuring range. Step height standard calibrated by VLSI Standard is measured by this probe with nm resolution.
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Hideki TSUTSUMI, Keiichi YOSIZUMI
Article type: Article
Pages
285-286
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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We has developed an ultrahigh-accuracy 3-D profilometer, which, using a new, in-house-developed atomic force probe, has an accuracy of 10nm. It is capable of measuring corners as small as 2 μm in radius and can cover an area up to 400x400x90(mm), providing a powerful boost to nano-level processing. A spherical lenses, semiconductor wafers, hard discs, all these products, and many others, could not exist without high precision measurements during their development and manufacture. The premiere ultra high-precision three-gimensional profilometer delivers superb performance using a variety of micro-measurements for a wide range of applications.
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Ichiko MISUMI, Satoshi GONDA, Tomizo KUROSAWA, Yasushi AZUMA, Toshiyuk ...
Article type: Article
Pages
287-288
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
CONFERENCE PROCEEDINGS
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Precision measurements of micro-patterned thin film thickness using the Nanometrological AFM were carried out. The Nanometrological AFM has a three-axis laser interferometer unit, and length standard-traceable calibration of small fine features can be operated in real scanning time. The micro-patterned thin films were fabricated by wet etching of thermally oxidized film and the thickness of thin films was checked by x-ray reflection measurement. Nominal thickness values of micro-patterned thin films were approximately 10,7,5 and 3nm respectively. Less than 0.5nm standard deviation of thickness was obtained using the Nanometrological AFM.
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Yasuhiro TAKAYA, Atsushi TAGUCHI, Satoru TAKAHASHI, Takashi MIYOSHI
Article type: Article
Pages
289-290
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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In this paper, we propose an optical measurement method that can be applied to the in-process measurement of microsurface profile with an accuracy on the nanometer order. Surface profiles are reconstructed by measuring two intensity distributions. Fraunhofer diffraction pattern of coherently illuminated work surface and an optical microscopic image. In this method, the whole illuminated profile can be measured at one time and no scanning procedure is imposed, and measurement is not likely to be affected by vibration and tilt of work. For higher resolution, the new instrument is designed and developed, and measurements of Fraunhofer diffraction including higher order diffraction intensities for an ultra precision grid plate standard is presented.
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Takaaki OIWA, Hiroshi NISHITANI
Article type: Article
Pages
291-292
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
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This paper presents an improved touch probe system for higher sensitivity. In this system, three fiber optic displacement sensors measure displacement and direction of a tip ball of the probe. Because the measuring resolution of the displacement was less than 12nm in experiments, a probe pre-travel was determined to 50nm. The variation of the pre-travel was less than 25nm in whole directions. The measuring force was approximately 0.6mN in horizontal directions, and was 9.4mN in vertical direction.
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Takamasa OHNUMA, Wei GAO, Satoshi KIYONO
Article type: Article
Pages
293-294
Published: September 20, 2002
Released on J-STAGE: August 01, 2017
CONFERENCE PROCEEDINGS
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At present, compact and high precision angle sensors, which are suitable for scanning probe measurement of large surface profiles, are not commercially available. In this paper, a high precision 2-dimensional angle sensor, which can simultaneously detect two dimensional components of the surface local slope, was designed and built. The sensor was evaluated by comparing with a commercially available autocollimator. Resolution of this angle sensor was confirmed to be better than 0.01arcsec.
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