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Yoshitaka KATO
Article type: Article
Session ID: 1218
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The stirling engine planed for science teaching in Oita region is introduced, and how the stirling engine should be developed for science teaching is proposed. Three rules are provided for the way to making the stirling engine as science teaching material for Oita region. The rules are 1) all the materials and tools are bought in the store distributed in whole of Oita Prefecture 2) No use of machine tools 3) Heat source for driving stirling engine must not be frame. Prototypes of the stirling engine have been demonstrated in two exhibitions held in Oita university. Based on the experience of the exhibitions, new concept stirling engine is required.
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Yuichi YOSHIZAWA, Hironobu YUKI
Article type: Article
Session ID: 1219
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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For beginners in mechanical engineering, it seems difficult to suppose motion of each element that composes a certain mechanism. In this study, we propose a computer assisted instruction (CAI) system for simulating 3-dimensional mechanism construction. It is intended that the system is used by teachers to present their own visual materials in the class, and students also use the system as a self-learning software to see motion of any mechanism. We developed the system for gear mechanism construction and used in the class of machine drawing as a trial. Since evaluation of CAI system is necessary for improvement in the quality of contents, a questionnaire was issued to both of the teachers and the students participated in the class. Results of the questionnaire demonstrate that the system could satisfy requirements of the teachers. It was also revealed that the attitudes of students about learning are significantly affected by their impression of the contents provided by the system.
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Tomoaki SATO, Keizo NAGAOKA, Kosei OGUCHI
Article type: Article
Session ID: 1220
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In the previous reports^<(1)-(3)>, the multi-media contents which support understandings of the operation principle of internal combustion engines were developed, and these contents were practiced in the machine practical training subject, and the learning effect was examined by the short tests and questionnaire. In this report, to explain the cycle of Otto engine, above-mentioned contents have been improved. This new contents installed the pointers that synchronize with the movement of the piston on the diagrams of PV, VS, TP and TS. The learners can operate these contents directly in the e-learning system. The learners can move the piston and they can confirm the state of this engine about temperature, pressure, volume, and entropy by synchronized pointer on the diagrams.
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Kenichi OKABE, Susumu HIOKI, Takehiko TAKAHASHI, Junichi KOBAYASHI, Sh ...
Article type: Article
Session ID: 1221
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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We instruct students in the operation of CAD/CAE. This instruction uses the "monozukuri" know-how of manufacturer and has the following features: (1) appropriate CAE modeling, (2) Verification of analysis results, (3) advanced CAE analysis cases, and (4) lectures given by expert engineers. This instruction has been provided at Akita Prefectural University since 2002.
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Yasuaki MORI
Article type: Article
Session ID: 1222
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The evaluation of R & D has been based on the direct output such as scientific papers and patents. However, it has become more important to evaluate the R & D from the point of outcomes, which are directly correlated with the benefit to the users, consumers and tax-payers, as the effectiveness of R & D has been more questioned. Here, we discuss the outcomes of robotics and robot industry by examining the teil lectual properties with a patent map because we have a very unique history of R & D for robot technology in Japan. Furthermore, we also discuss how we can establish the model of outcome-based evaluation of R & D in the engineering education by taking an example of the education in Waseda University.
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Chiaki NAGAI, Shozo ISHII, Toshimichi MORIWAKI
Article type: Article
Session ID: 1223
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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We are developing curriculum on medical engineering for working engineers, especially those who are from S & E enterprises. We are trying to develop 3 courses, Medical Technology & Equipment, Manufacturing Process & Industrial Engineering and plan to use these textbooks for master course in Kobe University in coming April. Each courses are comprised of not only 12 lessons but experiments and internship. What we are trying to do is to introduce realistic manufacuturing cases into textbooks as much as possible. Teaching level is another big problem, because those of working engineers lies within mostly those of technical college not of university graduates. This paper describes progress of our curriculum development as well as problems which we have to overcome.
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Hitoshi HIYAGON, Hidekazu TANAKA, Asao MIZUNO, Hiroshi ITO, Norio UCHI ...
Article type: Article
Session ID: 1224
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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We are leaders of "ET Association" that is the association for study of engineering ethics that is in Chubu Blanch of IPEJ (the Institution of Professional Engineers, Japan). We have held for the first time "Technology Cafe" series four times from this April to July. That theme was "The public and engineers thinking the view of "safety and mind-peace"". This movement is a science & technology communications for public by engineers, similar to "Science Cafe" that scientists are primarily doing, Also, "Technology Cafe" is scheduled after October to continue. I'll report on that first approach and results with this paper.
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Yoshinori MORIMOTO, Shigeru SAITO, Takamitsu YOSHIMOTO, Kazuyoshi WASE ...
Article type: Article
Session ID: 1225
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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There are a lot of problems for the environment in the recycle system society. It is important to learn the education of environment and security in the technology education. The KEMS (Kobe Environmental Management System) has been established. The education system of the mechanical engineering department of KCCT was certificated as KEMS step 2 on February 23, 2005, the level of which is nearly the same as ISO14001 (International Organization for Standardization is called ISO). The methods of instructions and the effect of education through the training course are reported before. We are wrestling it systematically now on a college course and have been accomplishing energy saving, resource saving, waste reduction, the green purchase, the promotion of an environmental education. It is reported about the process and the activity of the acquisition. The system was judged on 2006 in one year after it was certified. It is recognized and the objective regions will escalate from a site of mechanical engineering department to the whole college on 2007.2.
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Junji SUGISHITA
Article type: Article
Session ID: 1226
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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Engineer ethical perspective of the modern student for recent matter and accident was investigated. As the result, following facts were clarified. 1) Questionnaire was conducted on the student for rotation door accident and earthquake-proof strength camouflage problem. 2) The problem consciousness of the student for matter and accident is different from general member of society. 3) There was a difference on the engineer ethical perspective of the student according to the education policy of the department.
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Masahiro KAWASAKI, Satoshi SOMEYA, Koji OKAMOTO
Article type: Article
Session ID: 1227
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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Public Outreach (PO) is the bidirectional communication between researchers and the public, and especially in the field of technology affecting society it is essential. However, the existing PO is only disclosure of information in web page and symposium but the mutual understanding is insufficient. The aim of this research is to develop the web system which provides the best suited information depending on the users, and to mine the data of what they are interested in from the access log data.
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Toru FUJII, Seiji ASANUMA, Akihiro OBO, Akihiro OSAKI, Yasuhiro KUSHIH ...
Article type: Article
Session ID: 1228
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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For the purpose of making CO_2 absorption by plants realized, we developed a system which can measure and show the change in CO_2 concentration by various plants. The system allows people not only to watch a plant but also to observe CO_2 absorption by it in real time. In addition, this system for the experience exhibit enables them to interact with the plant by using the lights and breathing through the telephone receiver. We exhibited the system on World Exposition Aichi and tested it consecutively. As a result, we confirmed that the system is effective in realizing the activity of plants.
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Shuichi FUKUDA
Article type: Article
Session ID: 1301
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper discusses which is more adequately applicable to the problem of recycling, civil law or common law. The problem of lead free soldering is taken up for a case study. In this case, realizing the lead free soldering does not necessary mean the solution to the problem. Rather, new problems such as tin whisker are coming up which might endanger our safety more. As the technology is progressing so rapidly and the environmental problems are fundamentally related to the sense of value, it seems that common law approaches seem to be more adequate.
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Shuichi FUKUDA, Hayato AOSHIMA
Article type: Article
Session ID: 1302
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper points out that the framework of design is changing rapidly to incorporate user's judgment, decision and actions more and more, while the user in the traditional design have been expected to perform as the designer intended. And the fusion of software and hardware is quickly progressing. The problem of software is how we can tell its life is over. Thus, when we come to think that more and more human and software aspects are coming into environmental issues, the question arises: would the present framework of law for recycling would be effective?
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Shuichi FUKUDA, Manabu ISHII
Article type: Article
Session ID: 1303
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper poses a question: If design with more user involvement will come in and the functions of systems grow with time during their life cycles, would the present framework of laws for recycling be applicable? The current framework of laws for recycling is based upon the philosophy of growth, but in the case of software, it is more evolution than growth. Then, how would laws adapt to such changes from growth to evolution? The present framework of law is more deductive than inductive. But if such changes in design will come into reality, would it not be true that inductive framework be more effective?
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Daishi Okada, Koichi Sumikura
Article type: Article
Session ID: 1304
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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Among many technology-licensing organizations (TLO) established in late 1990s Japan, the University of Nagoya and the Tokyo Institute of Technology (Tokyo Tech.) had made their own organization more than 60 years ago. The paper focuses on the case of Tokyo Tech which established their industrial liaison foundation "Kogyo-Shinkou-kai" just after the war and converted it to "Toukoudai-TLO" in 1999. Under the University Reform just after WWII, Tokyo Tech established the foundation, which was modeled on that of Massachusetts Institute of Technology, to promote cooperative research with industries and to fix their research environment, funding, recruitment for assistants, and so on. The new political and social environment under the Science and Technology Basic Plan, started in 1995, made the liaison between universities and industries not only possible but also highly desirable. However it was prohibited their operation in 1980s, the foundation was converted to the reading technology licensing organization promoting liaison between Tokyo Tech and industries.
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Takashi HARADA
Article type: Article
Session ID: 1305
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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Evaluating an Technology means to determine the value of the R & D project according to the project purpose. By making a precise evaluation on the Technology and examining the quality of project, more useful R & D activities can be promoted. The evaluation system must be reviewed and adjusted so that the system can function more effectively for better understanding, acceptance, and support from Japanese people. The sustainable society cannot be achieved by scientific research and technological development alone. It is more important to accomplish the accountability of the society.
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Masaharu KUDOU
Article type: Article
Session ID: 1306
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The databases have been mainly protected by Copyright Law and Tort Law in Japan, but each protection has many differences, and it seems to be little functional that "the sweat of the brow" isn't protected very much. So, I think new protection will be demanded, and I shall study the possibilities for the databases to be protected by Unfair Competition Law, and "Sui Geneis Right" (the database right) on the legal aspects as well as the technical ones. Meanwhile, I shall also study the use of the databases in more detail, considering the balance among the authors of the databases, the users of them, the data holders, and "the data miners" from now on.
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Hiroshi Kato
Article type: Article
Session ID: 1307
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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TRIPS Agreement, which became effective in 1995, provided the minimum standard concerning the protection of the intellectual property among the member countries. TRIPS Agreement provided the different deadline for carrying out the minimum standard according to the situation of each country. Developing countries and least developed countries were given the extension of the deadline until 2000 and 2005. Therefore, the patent laws were frequently revised in many Asian countries. In this report, I am going to show you the trends and the issues of the intellectual property policy in Asian Countries based on my interviews to many Asian countries.
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Satoko Ida, Koichi Sumikura, Akiya Nagata
Article type: Article
Session ID: 1308
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In recent years, many researches point out the importance of appropriability and technological opportunity as determinants of innovation. Authors have targeted the innovation in pharmaceutical firms, and analyzed the determinants of innovation. This paper describes our survey results on a technological opportunity. The results from the analysis show the relation between importance of an information source and getting relevant information out of the firm through joint research or transaction of intellectual property. Further, the results show the patterns of the relation between R & D strategy and the important information source.
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Yukiko Kamijo, Koichi Sumikura, Masayuki Miyake, Yuji Mune
Article type: Article
Session ID: 1309
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In this paper the structure of the essential patents in US and Japan for MPEG2, pooled in the MPED-LA patent pool, was analyzed using the NRI Technology Heat Map. As a result we could visualize the transition of technological trends on the MPEG2 essential patents and the technological fields each patent holder focused on. We could also speculate the relationship between the timing for a company to join a patent pool and that of patent application of essential technologies.
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Jun HOSOYA, Junichi SAKATA, Katsuhiro SUZUKI
Article type: Article
Session ID: 1310
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The purpose of this paper is to clarify the contributions of research activities involving the fusion of one cutting edge technology with another, and how these lead to innovations. We introduce a quantitative measure between two technological elements based on the statistics of unexamined patent application data. We will present some analytical results obtained via this novel measure applied to specific developing technological regions, showing it will play an important role to investigate the innovations through technological fusion.
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Yukiko NISHIMURA, Koichi SUMIKURA
Article type: Article
Session ID: 1311
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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Since April 2000, we held a monthly seminar (Society for Management of Intellectual Properties ; Smips) for the purpose of personnel development and networking in the field of Intellectual Property Management. We discuss the significance of personnel development and their training methods based on various data and case examples shown at this seminar.
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Takahiro ADACHI, Yuji ISHINO, Masaya TAKASAKI, Takeshi MIZUNO
Article type: Article
Session ID: 3734
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper presents a method of mass measurement in weightless conditions, which uses the oscillation of a relay control system with velocity feedback. Factors for measurement errors are examined experimentally. The examined factors are the stiffness, viscous damping and delay time in the controller. The effects of each factor on measurement were clarified experimentally.
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Toyoka IDE, Keisuke NAGATO, Masayuki NAKAO, Tetsuya HAMAGUCHI, Naohiro ...
Article type: Article
Session ID: 3735
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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A polygon scanner motor in a laser printer rotates at more than 10krpm. It is necessary that the unbalanced weight is accurately removed after assembly, and the cost-reduction of the process is essential to progress its productivity. In this paper, an "automatic balancing system" is suggested. When a polygon scanner motor with liquid of ultraviolet ray curing plastic rotates beyond the resonance point, the weighted center of the polygon scanner motor automatically moves to the opposite side of the weighted center of liquid. Irradiating ultraviolet ray to the liquid after resonance point, the polygon scanner motor is balanced.
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Takayuki KOIZUMI, Nobutaka TSUJIUCHI, Kenichiro MORI, Toshiyuki SHIBAY ...
Article type: Article
Session ID: 3736
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper proposes theoretical grounds and procedures to identify experimentally the center-of-gravity (COG) and inertia terms of a three-dimensional body, in case its mass distribution is unavailable. Hanging a body at two points by two wires, a plumb line through the COG comes between the two points. An equation of the line can be determined by measuring the posture angles of the hanged body. By hanging at some pairs, the COG can be found as an intersection of the multiple lines. As for the inertia terms, measuring its natural periods of torsional oscillation in various directions, and solving the equations of inertia with respect to the rotation axis and the arbitrary axes, the six components are calculated. The verification test found that the results agree fairly well with the theoretical values.
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Yukika TODA, Ichiro KAGEYAMA
Article type: Article
Session ID: 3737
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The purpose of this study is to grasp the outline of Driving Pleasure and to estimate Driving Pleasure by analysis of driver behavior especially for the pleasure to the controllability of a vehicle. At first, the experiment to measure the mental condition of a subject is carried out by using a domestic car. The subject andwered subjective rating at the time with feeling for pleasure or displeasure. We found out some possiblilities about the pleasure to the controllability of the vehicle by analysis of feed forward steering control
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Tadashi Hirahata, Hisanari Kanakuri, Zenta Iwai, Ikuro Mizumoto, Makot ...
Article type: Article
Session ID: 3738
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In this paper, a practical method of process identification based on Prony's method, a kind of exponential analysis, is discussed. This method uses step input as an identification input. Thus, it is very practical, but at the same time it decreases the accuracy of identification at high frequency area because of the luck of the high frequency components in the step input. Here, we propose a new exponential analysis method based on the rectangular-wave input. In this case, optimal degree of identified transfer function is also examined by using IAE (Integral of Absolute Error) and AIC (Akaike Information Criterion).
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Kazuki EGUCHI, Zenta IWAI, Ikuro MIZUMOTO
Article type: Article
Session ID: 3739
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In this paper, a practical design method of stable PID controller based on almost strictly positive real(ASPR)-ness is proposed. Both the controller and the parallel feedforward compensator (PFC), which is introduced to guarantee ASPR-ness of a controlled plant, are designed by using partial model matching on frequency domain technique. The design method utilizes only a finite number of frequency response data so that there is no need to identify the whole transfer function of the controlled plant.
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Koei Saito, Toshiyuki Satoh
Article type: Article
Session ID: 3740
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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We propose a method for designing critical systems of the position control system for two inertia systems combined with the minor control loop and the disturbance observer. The minor control loop and the disturbance observer are designed in order to obtain the optimal damping factor and robustness of the modified plant. The proposed design method is demonstrated through simulations and experiments.
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Soichi HATAZOE, Ryota HAYASHI, Showzow TSUJIO
Article type: Article
Session ID: 3741
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In this report, we consider a problem of motion control of an inverted pendulum cart which moves along a sloping track with nonlinear characteristics. We design LQ state feedback gains around several equilibrium points. Then we calculate regions which have them in asymptotically stable. We propose the switching control system by use of LQ state feedback gains in consideration of their regions. Through numerical simulation, we investigate the feasibility of our control system which can perform a motion control of the inverted pendulum cart and which is robust against some disturbances while it moves.
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Yasutaka TSUJI, Takanori KIYOTA, Eiji KONDO
Article type: Article
Session ID: 3742
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In the hot strip finishing rolling, a strip is often rolled outside the roll barrel owing to its snake motion. In this paper, a tail crash control with fractional-order PI^αD controller is proposed in order to improve the snake motion of strip, in which the order of I controller is extended to fractional-order. The effectiveness of PI^αD controllers is demonstrated thorough numerical experiments.
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Naoki DOI, Shigeru KUCHII
Article type: Article
Session ID: 3743
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The noncontact control method with laser light pressure enabled us to trap and manipulate the particles of micrometer by laser trapping. This technique has been widely applied as one that can manipulate the particles in the nondemolition and noncontact state. In recent years, technical development to unveil the particle character of laser has been made in the field of cell technology, gene technology and ultramicrofabrication. And so, the experiment to trap and manipulate the particles in fluid with Ar laser is done to find optimal operation condition in noncontact movement of particles. Concludingly, the trapping force by laser irradiation depends on the particle properties.
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Tetsuo SATO
Article type: Article
Session ID: 3744
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The method of modal control is applied for the vibration control of machine structure which is expressed by the lumped parameter model. An L-shaped structure is attached with two electromagnetic exciters which control the vibration induced in it. Eventually, the modal control system is of 4-degree of freedom. To estimate parameters quantitatively, the computer simulation for the control system is carried out. For the modal feedback gains and PID compensators' gains, the best values that can be served to suppress the magnitudes of 1st to 4th mode are searched by the Simulink simulation.
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Tetsuya NAKAO, Shuji TANAKA
Article type: Article
Session ID: 3745
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The pinning effect of a high-temperature superconductor(HTS) realize noncontact levitation without additional devices. An HTS magnet can be easily produced by field cooling. When an HTS experiencing magnetic field is cooled by liquid nitrogen, the flux-pinning effect keeps magnetic flux trapped inside its body. It is field cooling. We developed an HTS rotary actuator system. This paper describes the design of the actuator system and a rotation speed controller. The controller is the same of the brushless DC servo motor. The experimental results showed that the rotation speed is satisfactorily controlled by the PI control law.
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Takehiro HIRAKAWA, Mochimitsu KOMORI
Article type: Article
Session ID: 3746
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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For microelectromechanical system, mechanical friction severely limits its performance and lifetime. Therefore contact-free levitation mechanism is an essential step in increasing its performance of micro mechanical devices. We have developed and evaluated a contact-free micromotor. The micromotor system is composed of a stator that has eight electromagnets and a disc-shaped rotor that has 6 poles. And, we design a contact-free micromotor with Field Programmable Gate Array (FPGA), which aims at its miniaturization and its higher performances.
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Jun SHINOZAKI, Kenichiro MATSUZAKI, Takahiro KONDOU, Nobuyuki SOWA, Ko ...
Article type: Article
Session ID: 3747
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The motion control of 2-link flexible arm using the subspace control and the computed torque method is discussed. In the subspace control, the state space is separated into the target subspace and the control subspace using modal analysis. The control is necessary only in the control subspace because the target subspace is stable without control input. Then, the computed torque method is applied to the control subspace. The smooth and rapid motion control is confirmed by numerical simulation and experiment.
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Mitsuaki ISHITOBI, Masatoshi NISHI, Masaaki MIYACHI
Article type: Article
Session ID: 3748
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper deals with model following control of a model helicopter with three degree-of-freedom. The online parameter estimation technique is introduced. The integral type of estimation model is proposed here since the use of the derivative type of model cannot obtain the desired estimation result. The experimental results show the effectiveness of the proposed method.
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Shinya OHISHI, Ikuro MIZUMOTO, Makoto KUMON, Zenta IWAI, Ryuichi KOHZA ...
Article type: Article
Session ID: 3749
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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It is very important to confirm the robust performance of the existing control scheme through experiments because several problems which might not satisfy the assumptions imposed on the controlled system are in hiding in practical applications. In this paper, we verify the effectiveness of the proposed robust adaptive backstepping control through experiment of a magnetic levitation system with uncertain nonlinearities.
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Masaru NARUOKA, Takeshi TSUCHIYA
Article type: Article
Session ID: 3801
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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INS/GPS integrated navigation systems, which have been widely used for aircrafts and spacecrafts, have great potential for widespread use. But they have never been used popularly because they use big, heavy and expensive dedicated components. Therefore this paper suggests a new INS/GPS configuration with general-purpose MEMS sensors and a GPS, which have poor precision for navigation, and quaternion algorithm. Making a prototype proves the suggested INS/GPS is far smaller, lighter and more inexpensive than existing ones. In addition, an experiment for comparing with GAIA, a high-precision INS/GPS instrument developed by JAXA, shows it gives precision enough for controlling or monitoring general moving objects.
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Ryota MORI, Masaru NARUOKA, Takeshi TSUCHIYA, Shinji SUZUKI
Article type: Article
Session ID: 3802
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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A neural network modeling approach has been developed to analyze human pilots' control by utilizing the recorded time history of visual cues and pilot control inputs. An experimental method is developed to record the time histories of visual cues and pilot control inputs by analyzing recorded video data at a real flight. The developed method makes it possible to obtain neural network model of a pilot at a real landing case. In this research, the reliability of this method is confirmed by comparing the video data with GPS/INS data. The obtained results of the contribution ratios and sensitivities reveal the characteristics of the pilot's control.
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Hidekazu NISHIUCHI, Seigo WATANABE, Yasuhito SANO, Kouki MITSUISHI
Article type: Article
Session ID: 3803
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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Using High-Speed Camera, we had developed high speed motion calculation unit with fewer hardware resources. We forcused on a phenomenon that obstacle motion is less than one pixel under higher sampling rate. With this phenomenon, we eliminated repeatable processing like identification between two images captured in different time, and we had constracted high speed processing hardware architecture with sequential processing only. Applying this architecture, our processing unit performs, 0.5usec processing time, and 480Hz processing cycle.
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Yusuke Sato, Ichiro Kageyama
Article type: Article
Session ID: 3804
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper covers sensing technology for the condition of forward road surface. The change of refrection powerof scanning laser rader was used at scanning road roughness of forward road in order to be connected with road roughness and coefficient of friction. At first, This experiment discusse about variation in factor of refrection power in oder to recognize road roughness particularly. At the result, refrection power relates to measurement distance and degree of the angle, and optical angle. Finally, it is concluded that method of sensing technology for the condition of forward road surface was constructed by thinking of variation in factor of refrection power.
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Makoto Katoh, Xue Li
Article type: Article
Session ID: 3805
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper proposed two methods using two kinds of norm for estimating number of average arrival persons to an elevator hall at a time after identifying the membership functions based on a virtual elevator traffic analysis as a fuzzy time zone. Then, we compare 4 kinds of average waiting times on a group control method and the conventional control method which are computed using the estimated number of persons at the office-going time based on the queueing theory assumed Poisson's Arrival and Erlang's Operation, which theory can facilitate the evaluation of the waiting time at an elevator hall by only simple statistical computation. Moreover, we present domination of the group control method by compared simply these energy saving evaluation using start/stop number and movement floor number.
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Keiichi Tanaka, Makoto Katoh
Article type: Article
Session ID: 3806
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper presents on problems and kinds of multi-point passing as machine tools in a course search of a virtual factory based on a selective learning from multi-directive behavior patterns using PS (Profit Sharing) by an agent. A behavior is selected stochastically from 8 kinds of ones using QL like Boltzmann Distribution with an invalid rule inhibition plan by a reinforcement function of an equal ratio decrease type. Moreover, a variable temperature scheme is adopted in this distribution, where the environmental identification is valued in the first stage of the search and the convergence of learning is shifted to be valuing as time passes.
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Yoshihiro SUDA, Steven E. SHLADOVER, Yoshiyuki TAKAHASHI, Masaaki ONUK ...
Article type: Article
Session ID: 3807
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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The Sustainable ITS Project at the University of Tokyo has developed "the Universal Driving Simulator for Human, Vehicle and Traffic Research". This driving simulator can be used for research involving ITS, vehicle development and evaluation, including human factors of driving in traffic. The simulator can be connected to a macroscopic and microscopic traffic simulation system called KAKUMO. KAKUMO can generate virtual traffic in the simulator scenario in real time, with up to 100 surrounding vehicles created and controlled independently. Before applying this simulator to experiments, empirical calibration and validation will be required. In this paper, the evaluation of the traffic simulation component of the driving simulator is described. A pilot experiment was carried out to start the validation of the driving simulator, comparing the driving of an experimental vehicle on a real road and driving the same road in the simulator.
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Kensuke KOBAYASHI, Taichi SHIIBA, Haruo SHIMOSAKA, Tsuyoshi OKADA
Article type: Article
Session ID: 3808
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper describes the development of a tire testing machine with 6-degree-of-freedom motion system. Vehicle behavior depends on cornering force, which arises on tire. Vertical load of tire and its alignments change while vehicle is moving on road, and it causes a change of cornering force. To evaluate influence of vertical load of tire and its alignments change, we developed a tire testing machine with 6-degree-of-freedom motion system. The developed testing machine consists of motion system, suspension mechanism, and roller conveyer. With the developed testing machine, influence of a change of vertical load of tire and its alignments on tire was evaluated.
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Toshiyuki Ikeda, Naoto Kamiyama, Hiroshi Tajima, Toru Watanabe, Kazuto ...
Article type: Article
Session ID: 3809
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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In order to improve a fuel economy or acceleration performance, the weight of vehicle must decrease do one of effective way. It invite the decrease vehicle body stiffness that affects on driving performance of the vehicles. Therefore, it is an important issue to investigate the relation between body stiffness and driving performance of vehicles. According to this, a road simulator utilizing a belt conveyer and an experimental vehicle with variable body stiffness are built to perform experimental research. The stiffness of vehicle body is varied by changing a body part. The behavior of the vehicle is measured by sensors, while the vehicle runs on the road simulator. By comparing the behaviors with different body stiffness, the relation between body stiffness and driving performance of the vehicle can be identified.
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Masaru TAKASE, RAKSINCHAROENSAK Pongsathorn, Hidehisa YOSHIDA, Masao N ...
Article type: Article
Session ID: 3810
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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Recently, Steer-by-wire(SBW), a next-generation steering system in which there is no mechanical link between the vehicle's steering wheel and the front-wheel steering actuator, has been paid more attention by researchers. SBW can control front wheel angle independently of steering wheel angle. Generally, driver is driving with steering angle at low speed region and torque at high speed region. However, this fact has not been proven with theory of vehicle dynamics. Clarification of the steering input on the basis of vehicle dynamics leads to a precise control of SBW. Direct Drive (DD) motor is used to generate artificial steering reaction torque depending on vehicle speed and dynamics on driving simulator. Experimental investigation on driver-vehicle system performance against crosswind disturbance is conducted at high speed with variable steering reaction torque.
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Nami NAGAE, Masahiro KUBOTA, Hiroshi MOURI, Hiroyuki FURUSHOU
Article type: Article
Session ID: 3811
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper describes a study on the relationship between the steering characteristics and driver's steering operation in the driver-vehicle closed-loop system. So we developed a driving simulator controlled by a new algorithm, which can design steering torque and angle independently. In the paper, dumping and natural frequency of the transfer function of steering angle/steering torque have how effect on the driver's steering action and the feeling. The experiment showed that the driver's steering action was changing deeply related on the steering torque, haptic information, as well as visual information. At last, we proposed the directional character of the steering torque.
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Satoshi TOMITA, Hidehisa YOSHIDA, Masao NAGAI
Article type: Article
Session ID: 3812
Published: September 15, 2006
Released on J-STAGE: August 01, 2017
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This paper describes the evaluation of brake assistance system. A new brake assistance system based on driver's operation was proposed previous work. Previous work took note of the characteristics of gas pedal operation. This system based on experimental results which were experiment with test car and driving simulator. But such brake assistance system was not verified in real road traffic. So this study intends to validation such brake assistance system in real road traffic. But in real road traffic, we cannot set this brake assistance system by the traffic law. In consequence, this study intends to prove that evaluation value of this system does not over the threshold at usually driving.
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