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Published: September 07, 2007
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Article type: Appendix
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Published: September 07, 2007
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Article type: Index
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A1-A9
Published: September 07, 2007
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Takehisa KOHIRA, Akinori UTSUNOMIYA, Kohya NAKAGAWA
Article type: Article
Session ID: 0101
Published: September 07, 2007
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Recently, not only demand of silent characteristic in automobile is increasing, but also vehicle reduction is strongly required from the viewpoint of the environment protection. We have focused on surface stiffness of the panel to develop panel structure with high damping performance. However, the mechanism of damping material has not been cleared in this investigation. In this paper, it is defined requirement of steel panel structure with high damping performance using Modal Strain Energy Method, and verified damping effect of this structure by numerical analysis.
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Yasushi Hayakawa, Sohei Matsuda, Hideo Saho, Tadashige Ikeda, Tetsuhik ...
Article type: Article
Session ID: 0102
Published: September 07, 2007
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This paper reports the vibration characteristics of banging vibration of uniform cantilever beams. The target is to clarify transient response and frequency response. For the transient response, the beam is given an initial displacement and released. For frequency response, it is excited with constant acceleration condition at the root by changing frequencies. Consequently, three peculiar characteristics were observed by experiments and numerical simulations. First, the damping depends on the strain. Second, changes of stiffness in banging vibration cause jumping phenomena. Finally, the banging vibration affects the transient and frequency response, dissipating the kinetic energy.
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Takuzo IWATSUBO, Masashi MATSUDA
Article type: Article
Session ID: 0103
Published: September 07, 2007
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This paper presents a method to obtain an optimal labyrinth seal configuration installed in a fluid turbomachinery. As an actually used labyrinth seal, there is a stepped type seals but optimum seal configuration is not studied. So in this paper, optimum seal configuration is studied from the view point of static and. dynamic characteristics by changing the configuration of the stepped type seal. The governing equations are derived by using the equations of continuity and momentum equations. The static and dynamic characteristics are calculated for varying the configuration in order to obtain the optimal configurations of the stepped type seal. Thereby, the optimal combination of the straight and stepped type components is investigated. The evaluation items as a performance of the seal are leakage and effective damping coefficient as guideline of stability assessment of rotor system. The optimal seal configuration is obtained by the calculation result.
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Katsuhiko KURODA, Toru YAMAZAKI, Fumiyasu KURATANI
Article type: Article
Session ID: 0104
Published: September 07, 2007
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This paper investigates influence of in-plane vibration on building SEA model for flexural vibration. FEM calculation is carried out for the comparison of the SEA loss factors concerning flexural vibrations between with and without taking the in-plane vibrations into consideration. The test structure in this paper is a simple system which is composed of two plates connected in an L-shaped configuration. As a result, a new guideline for judging the influence of in-plane vibration in advance is introduced. The natural frequency analysis for uncoupled subsystem is used to understand the frequency range affected by the in-plane vibration. The degree of influence for the in-plane vibration can be predicted from the proposed estimation method that is derived by the flexural vibration results and wave theory.
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Yoshihisa HONDA
Article type: Article
Session ID: 0105
Published: September 07, 2007
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Many researchers have studied the impact phenomenon in ball games, such as golf, tennis, baseball, soccer and so on. Although it is very important to understand the dynamic behavior of a ball on the impact phenomenon, the sufficient theoretical understanding of the behavior has not been obtained. In this paper, normal impact of hollow balls is theoretically analysed and the dynamic response of hollow balls is derived as an axisymmetric motion of an elastic spherical shell by using modal expansion method, where effects of area applied by impact force are took into account. The modal distribution of mechanical energies resulted by the work of impact force are discussed.
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Masayuki Azuma, Atsuhiko SHINTANI, Katsuhisa Fujita
Article type: Article
Session ID: 0106
Published: September 07, 2007
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The stability analysis of disk brake system for squeal reduction is investigated. Two types of simple analytical models are proposed in this paper. One consists of a disk and two pads. The other consists of a disk, pads and pistons. The coupled equations of disk brake system are derived, the complex eigenvalue analyses are performed based on this equation. Numerical simulations are performed for the parameters such as spring constant, friction coefficient, contacting condition and so on.
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Kazuhisa FURUTA, Tomohiro ITO, Atsuhiko SHINTANI
Article type: Article
Session ID: 0107
Published: September 07, 2007
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The spent fuels from nuclear power stations are stored in a canister which is put in a concrete cask until reprocessed. The cask is generically free-standing on a horizontal floor. So, it is necessary to prevent the cask from overturning and the canister from breaking when an earthquake occurs. In this study, we consider the cask-canister system as a dual structure. In an analytical model, the canister and the cask are connected by springs as a dual structure system. The equations of motion are derived for sliding motion when the floor is subjected to the horizontal earthquake excitations. Simulation studies are performed. The relative displacement of the cask against the floor and the relative displacement of the canister against the cask are obtained, and the effects of the canister in the cask motion are evaluated.
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Yuji OKAMOTO, Yutaka KURITA, Yuichi MATSUMURA, Takayuki MASUDA
Article type: Article
Session ID: 0108
Published: September 07, 2007
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In the process of constant amount subdividing, the supply method by the intermission drive on vibratory transportation machine is used. By Velocity FB control, a high-speed intermittent drive and high-speed fixed-quantity supply can be done. The authors developed the open loop control that imitated velocity FB control, and the high-speed intermittence drive was done without using a sensor. When a natural frequency is corresponding to natural frequency of open loop control, it shows the characteristic completely equivalent to velocity FB control. However, since open loop control was weakness in the change of natural frequency, the tolerance level of change of natural frequency was investigated. The range was -1% to +0.2% and it was shown clearly that a fixed quantity could be supplied to 210g equivalent to 15% of the mass of a table of transportation machine.
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Shigeru AOKI, Yuji Nakanishi, Kazutoshi Tominaga, Takeshi Otaka, Mitsu ...
Article type: Article
Session ID: 0109
Published: September 07, 2007
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A new device for reduction of seismic response of mechanical system is developed. The device is friction bearing which consists of upper and lower plates with spherical holes and sandwiched spherical metals surrounded by rubber. Seismic response is reduced by friction between plates and metals. The device is shaken by the shaking table. Acceleration response of upper plate is measured. The maximum values of the response and the excitation, sum of squares and power spectrum are obtained. It is concluded that the repose is significantly reduced.
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Msanobu YOSHINO, Kazuyuki ONO, Shigeo YANABE
Article type: Article
Session ID: 0110
Published: September 07, 2007
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This paper shows the simulated results of the resonance which occurs in star-type planetary gear trains. In this simulation, the inner gear and the planetary gear have the installation error and the eccentricity to the rotating center. The inner gear has a manufacturing error at pitch circle shape as well. The influences of the errors to the resonance are discussed. As the summary, the installation error of the inner gear and the planetary gear are not the cause of the resonance of the gear trains. The eccentricity of the inner gear is not a cause of the resonance but the eccentricity of the planetary gear is the cause of the resonance, but this error excites another higher vibration mode. The cause of the present resonance can be thought that the inner gear, whose shape is triangle, installed on the planetary gear trains, which has tree planetary gears.
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Izumi NAKAMURA, Akihito OTANI, Masaki SHIRATORI
Article type: Article
Session ID: 0111
Published: September 07, 2007
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Piping systems used for an extended period may develop degradations such as cracks or wall thinning due to aging. In order to clarify the behavior of piping systems with a crack under seismic events, shake table tests for simply designed piping system models with a crack were conducted. The test results showed that the existence of a crack did not have significant effect on the vibration characteristics of the piping system model both under the elastic and elastic-plastic response. The failure mode obtained from the test was crack penetration from the initial crack. The first excursion failure did not occur though the maximum applied moment exceeded the leak moment determined by the Net-section criterion.
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Yoshitaka FUJITA, Yutaka KURITA, Yuichi MATSUMURA, Sayuri UMEDUKA
Article type: Article
Session ID: 0112
Published: September 07, 2007
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Elliptical vibration machines can transport works in multiple directions by varying the phase difference between vertical and horizontal vibration. Works have a phase difference with zero velocity. The phase difference with zero velocity change based on a work's friction coefficients. Utilizing this characteristic, electronic parts with different friction coefficients of the face side and the reverse side can be separated. If the given vertical vibration is over jumping limit, the phase differences with zero velocity of the face side of electronic parts change drastically. As a result, the margin between the two phase differences with zero velocity widens and electronic parts can be separated face/reverse side quickly. In this investigation, we observe the movement of electronic parts using a high-speed camera and search for the reason that the phase differences with zero velocity change.
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Kenta SEKI, Motohiro KAWAFUKU, Makoto IWASAKI, Hiromu HIRAI, Kazuki YA ...
Article type: Article
Session ID: 0113
Published: September 07, 2007
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This paper presents a practical control methodology of shaking tables for earthquake simulators. Reaction force generated by a specimen on the shaking table generally deteriorates the motion performance of the table, resulting in the lower control accuracy of seismic tests. In order to provide the precise table motion, therefore, a 2-degrees-of-freedom control structure is adopted, where reaction force generated by a specimen on the shaking table and tracking perfomance can be compensated. The proposed compensation algorithm has been verified by experiments using a prototype shaking table system.
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Yuichi ARIGA, Keiji WATANABE, Shigeru ENDO, Takayuki KAMIMURA
Article type: Article
Session ID: 0114
Published: September 07, 2007
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This paper describes a human power amplification type transportation work support device and its control method. This system is composed of two units. One is a robot arm, and another one is a unit for operation. This unit that we designed connects the robot arm and a person's arm and detects person's operation power. Person's operation power can be amplified by applying an original positional control to this device. Because this system works based on person's operation power, it is thought that the reliability and generality are improved more than the precedent research's system that works based on the living body signal. This operation unit and the control method have been applied to the system of one degree of freedom, and the effect of this system has been verified by simulation.
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Takehiko Asai, Yoshikazu Araki, Nobutoshi Yoshida
Article type: Article
Session ID: 0115
Published: September 07, 2007
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This paper demonstrates the effectiveness of a passive vertical vibration isolation device proposed by the authors through experiments. The device is composed of a combination of constant-load springs, which sustain constant loads regardless of the magnitude of deformation. The use of constant-load springs as a restoring mechanism limits the transmission of the reaction force from the ground to the object placed on the device within a specified value. This way, the device can reduce the maximum response acceleration of the object to a specified value regardless of the kinds and magnitudes of earthquake ground motions. Moreover, the device can avoid resonance.
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Motoharu KIKUCHI, Kenta SEKI, Motohiro KAWAFUKU, Makoto IWASAKI, Hirom ...
Article type: Article
Session ID: 0116
Published: September 07, 2007
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This paper describes a study on the relationship of the convergence perfoemance between the error signal and the modeling error of the plant (shaking table for earthquake simulators) with iterative learning control (ILC) system. The error signal converge to zero with minimum number of trials by using inverse model of the plant as a learning law. However, due to the existance of the modeling error caused by a specimen on the shaking table, it is difficult to achieve the best performance of ILC. So, we verified the relationship between the modeling error and the convergence performance of ILC by using numerical simulations and experiments with prototype system.
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Atsushi FUJIWARA, Makoto KATOH
Article type: Article
Session ID: 0117
Published: September 07, 2007
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In present paper, an ideal-input model reference adaptive control scheme for anti-sway and position control with some kinds of pendulum (rope) length in a reference model of an overhead traveling crane has been proposed and verified by various simulated experiments. Moreover, the system has also a robust property for load changes by a gain scheduling on the three parameters of the PID controller included in the system. Some results of effectiveness verification experiments for pendulum length change and weight change were satisfactory on anti-sway and position control at the same time.
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Noriko SAITO, Hiroyuki KAWASHIMA, Akio KOBAYASHI, Masayuki MOMIUCHI, R ...
Article type: Article
Session ID: 0118
Published: September 07, 2007
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We fabricated a membrane deformable mirror (DM) for ophthalmologic adaptive optics and developed a novel algorithm to determine voltage of 85 electrodes of DM to compensate an arbitrary mirror shape. Voltage "templates" were created for each Zernike modes. Aberration was better cancelled using the superposition of the template in this study than the ones we reported earlier. We examined order dependence of the template superposition method and demonstrated that the compensation was improved as higher order Zernike modes were included in templates. We also applied the new algorithm to the aberration compensation directly, that is, without templates and compared the two methods. While the template superposition method provided faster modulation of DM, the direct application of the new algorithm resulted in more precise compensation. The combination of the two methods is effective in the compensation of the wavefront aberration of eyes.
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Tetsuya YAMADA, Fumiyasu KURATANI
Article type: Article
Session ID: 0119
Published: September 07, 2007
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We develop a biped walking model to stimulate student interest in scientific knowledge as well as object-making at elementary and junior high schools. To obtain the model for stable walking, we examine experimentally the influence of leg shape, the leg center of gravity and weight at the top end of arm on its walking time and walking stability. The results indicate that the shifting of the leg center of gravity improves the walking stability. The change in weight at the top end of arm easily controls the walking speed because the body moment of inertia changes with the change in its weight.
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Daisuke IKEDA, Shigeru FUJIMOTO
Article type: Article
Session ID: 0120
Published: September 07, 2007
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This paper deals with a simple design method of a generator, which consist of the column type magnet and the coil, incorporated into a dynamic damper for a footbridge. First, a simple equation on voltage generated by the generator is proposed. Further, the vibration tests using a generator model are performed to evaluate the validity of the simple equation. It is confirmed that the voltage amplitude generated by the generator model and the voltage calculated by the simple equation agree well. From these results, the validity of the simple design method of the generator is proved.
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Hiroaki HASHIMOTO, Kenichi OKUBO
Article type: Article
Session ID: 0121
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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Using multibody dynamics, we investigated the behavior of a high-speed mechanism for operating a high-voltage gas circuit breaker (GCB). The circuit is opened or closed by using mechanical energy stored in compressed springs. The spring operating mechanism must be small and light. We used an analytical method to reduce the time for developing such a mechanism. The dynamic characteristics of a spring operated GCB can be modeled, so that the dynamic behavior of the entire GCB can be investigated. Investigation of the behaviors of the ratchet gear in a spring operated mechanism showed that the ratcher gear jumps after the interrupter contact closes. Using this analysis model and selecting an appropriate design will make it possible to improve the reliability of the ratchet gear before making a prototype GCB.
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Tomohiro SHIMODA, Kazuhiro TSURUTA, Takashi FUJIMOTO
Article type: Article
Session ID: 0122
Published: September 07, 2007
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This paper proposes a highly accurate method of system identification for a ball-screw driven system with Coulomb friction as well as a stable disturbance such as a gravitational force applied to a work. System Identification was carried out using GA and Direct Search Method.
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Takashi FUJIMOTO, Kazuhiro TSURUTA
Article type: Article
Session ID: 0123
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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This paper deals with a positioning control of a ball-screw driven system. The objective is to control the motion specified by a trapezoidal velocity profile and to achieve the highly accurate positioning, using multi-segment sliding mode control method. The multi-segment switching functions are designed to satisfy the state trajectories corresponding to the trapezoidal velocity profile. The proposed control method is applied to the system driven by an AC servomotor to verify its control performances. The experimental results show that the proposed technique is applicable to the acceleration and deceleration motion even in the range of 2gm/s^2 (g is the gravitational acceleration) and effectively suppresses a position error as well as an overshoot in comparison with the conventional PID control techniques.
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Takayuki MIYAOKA, Yutaka KURITA, Yuichi MATSUMURA, Tsutomu MISAKI
Article type: Article
Session ID: 0130
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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The method for real time measurement of the dynamic stiffness of an object was developed by the authors. The method uses the self-excited vibration generated by the positive feedback of velocity. Then we showed that viscoelastic coefficients in subcutaneous tissues, which did not depend on measurement conditions, could be quantified with the estimated dynamic stiffness, based on the correspondence principle between the theory of elasticity and viscoelasticity. This paper showed that the response and the accuracy of frequency estimation were improved by using Kalman filter as an adaptive filter. Using numerial simulation of frequency estimation, we compared Kalman filter to Normalizing LMS algorithm which was used as an adaptive filter in former method. We also examined that the response and the accuracy of the frequency estimation improved the response and the accuracy of the viscoelasticity measurement.
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Koji KUNO, Katsuya INUZUKA, Masaki YAMAMOTO, Masaru KOHCHI, Hiroyuki O ...
Article type: Article
Session ID: 0131
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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The product appearance is presently most popularly inspected visually, but the visual inspection has problems of quality variations due to overlooking and difference of individual inspectors, and others, and an automated inspection has been waited. Therefore, recently, the appearance blow hole inspection technology has been established and put into practical use on the basis of the expanded depth of field and high-reliability image processing algorithm, and this report describes the technology.
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Hiromasa SENBA, Yasuo Toi
Article type: Article
Session ID: 0132
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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This paper deals with a plant water stress sensor using PVDF piezoelectric films. It is known that the acoustic emission (AE) occurs in the vessels when the plants such as tomatoes fall into a water-stress-state due to lack of water. PVDF piezoelectric films are discussed as a plant water stress sensor utilizing the characteristics of its flexibility. The sensor sensitivity to the AE signal generating on the small wood piece are measured for film area, thickness and the number of layer. Results are shown that the PVDF film area and adhesiveness to the object are most important for increasing sensors sensitivity. As it is hard for the films to adhere tightly to plant stem because of their damp, however, the different way using a thin metal plate with knife-edge parts is introduced as a simple sensor for detecting water-stress of tomatoes.
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Hiroshi TAKAHASHI, Junichi KURATA, Hironobu UCHIYAMA, Yoshihiro MURAKA ...
Article type: Article
Session ID: 0133
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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A reactive speed of neutralizing is measured by the change of hue caused by the phenol red that is the indicator by using the image processing in the model of the neutralizing titration, and the concentration of the sample is measured by a reactive speed. Owing to the measurement of a reactive speed, it is not necessary to change the second state of equilibrium. Therefore, the quantity of the titration liquid is 1/10 of ordinary method. The quantity of the phenol red doesn't influence the reaction. Therefore this titration method can be simply done. It is possible to apply even in fields of the chelatometric titration and so on. We propose that this method could be simple and efficient to reduce the quantity of the titration liquid.
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Tomoya ABE, Kenichiro TAKEISHI, Masaharu KOMIYAMA, Takeshii FUJIMOTO
Article type: Article
Session ID: 0134
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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Shock tube generates heated gas by reflected shock near the end wall of the tube. The hot gas temperature, pressure, and density distribution is homogeneous, so the gas is used for heat transfer test, and reservoir gas for shock tunnels which can generate hypersonic flow. However, it is difficult to measure the temperature. Since the duration is very short: about lmsec. Thermocouple can't be used to measure the temperature, because the response time isn't enough. Therefore, in this paper, for instantaneous measurement, we used diode laser absorption technique. Chemical species (this time, water) absorb light. The theory is that the ratio of two-wavelength absorption band is function of only temperature. The result is the differences between theoretical values and measured values are large. It is thought that heat of evaporation deprive hot gas of heat.
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Koji YOSHINO, Yutaka KURITA, Yuichi MATSUMURA, Yuya INOUE
Article type: Article
Session ID: 0135
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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The analyzer that displays force and moment working on a moving object in real-time was developed. This analyzer can display those by combining Inverse Dynamics Analysis with an Image Processing. After measuring acceleration of an object, quantity of dynamics working on an object can be calculated with Inverse Dynamics Analysis. These quantities of dynamics are displayed in real-time, then force and moment working on an object can be seen at a glance. In this paper, the response of analyzer is improved by using jerk model. Through the example of single pendulum and a moving object on slope, it is shown that the relation between force and movement working on object can be displayed intelligibly from the viewpoint of dynamics education.
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Wataru ITO, Yuuya SHIRAYAMA, Nobuo KURIHARA
Article type: Article
Session ID: 0136
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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A dynamic simulator for evaluation of a woody biomass cogeneration system has been tried. By using the simulator, named DYSEBIC, designing a plant in advance can be considered. Element apparatus items, such as a gasification furnace, a gas engine, a generator, an absorption refrigerator, heat exchanger, and their controller constitute the simulator. Where, an online estimation of gas composition is necessary to manage thermal efficiency at the controller. In this paper, gas composition depending on an operating condition was clarified to investigate a method of an online estimation. These results can be applied to combustion test in the next step.
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Kazuto SUMIKAWA, Yuuya SIRAYAMA, Nobuo KURIHARA
Article type: Article
Session ID: 0137
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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A combustion characteristic of the pseudo-biomass gas which had composition calculated in the simulator, DYSEBIC, was investigated by an engine experiment. LPG engine with four cylinders was applied, and an in-cylinder pressure sensor and a crank angle sensor were installed. As a result of experiment, it was confirmed that data mining of in-cylinder pressure signals could lead calorific value of pseudo-biomass gas. Besides, it was suggested that management of heat conversion efficiency could use a result of engine combustion.
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Nobuo KOMATSU, Yuki KUSANO
Article type: Article
Session ID: 0138
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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In this paper, an electronic guidance cane system to assist the visually handicapped is proposed. The system consists of sensors for positioning, an image sensor with a laser pointer to detect obstacles and a motor to produce the vibration for warnings. The posistioning sensor system consists of acceleration sensors, a gyro sensor, earth magnetism sensors. Some experimental results of positioning are shown in this paper.
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Mitsuo YAMAZAKI, Tadashi EGAMI
Article type: Article
Session ID: 0139
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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We propose a new path control method with path error search and apply it to NC milling machines. We search the shortest distance point on a target path from a present position and the minimum distance is an essential path error. We set the minimum distance along the standard axis and perform coordinate transformations for a mechanical system. An effective path control with little path error is realized by the proposed method.
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Hiroyuki KANAZAWA, Tadashi EGAMI
Article type: Article
Session ID: 0140
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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We propose a new path control for vehicles using the time-state control form with expansionary coordinate transformations. We can realize a desirable variable speed path control by the proposed method.
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Kazuhiro Hirasawa, Masato Otsuki, Hidetoshi Oya
Article type: Article
Session ID: 0141
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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It becomes aggravated about environmental problems in recent years. Various researches to aim at energy conservation are performed along with it. We paid attention to the air-conditioning system of living room in the apartment house. In this research, i t aims at the construction of the regulating system that makes the room a comfortable space by ventilation and ventilation. In this study, deal with the distribution analysis for the control model's construction by using the CFD software for the current of air distribution in the room.
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Ryuhei NISHIMURA, Korei HAN, Kazuhiro IZUI, Shinji NISHIWAKI, Masataka ...
Article type: Article
Session ID: 0301
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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This paper discusses a method for evaluating degrees of inventive step of inventions by applying to the AHP (Analytic Hierarchy Process). In spite that judgment on inventive step has been long studied and discussed, since criteria regarding the judgment on inventive step are varied and vague, a qualitative judging method has merely been suggested and a judgment result merely has been concluded whether an invention meets the patent level or not. We focus on that the judgment on inventive step is resulted from some kind of examiner's decision with his own sense and try to evaluate degrees of inventive step by applying to the ARP which is useful for the decision under vague circumstances in order to contribute to the technical evaluation or the patent value evaluation as well as patent judgment.
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Jun HOSOYA, Junichi SAKATA, Katsuhiro SUZUKI
Article type: Article
Session ID: 0302
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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Using patent data, a new quantitative analytical method categorizes the fusion degree of leading edge research and development (R & D) fields in order to examine the current R & D status and strategies of companies focusing in the fuel battery field, an area showing great potential as an alternative to fossil fuels. Specifically, this paper presents three types of categorization reflecting the International Patent Classification (IPC) of patent data, and introduces the concept of "innovation positions" which is based on this categorization. For example, application purposes can be different between various industrial sectors, even within the same technological field; therefore, the progress status of R & D varies and that fact. is reflected in innovation positions. Additionally, this paper makes clear that innovation positions reflect differences in companies' core competences, even in the same industry. This analytical method provides an original approach to comprehend technological linkages and innovation.
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Hiroshi Kato
Article type: Article
Session ID: 0303
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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Central Government is developing the plan for Intellectual Property Policy every year. However, the plan for Intellectual Property Policy should be developed also by Local Government because Intellectual Property Policy depends on the feature (e.g. the most leading industry, the most advanced technology) in each local area. Therefore, some Local Governments started to develop their own plans for Intellectual Property Policy in their own local area. Under the situation above, it is becoming new issue to think about the different role of Central Government and Local Government for Intellectual Property Policy. In this paper, the difference between Central Government and Local Government for Intellectual Property Policy becomes clear by the analysis based on the Questionnaire Survey.
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Koichi Sumikura
Article type: Article
Session ID: 0304
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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In this paper we focus on knowledge sharing and confidential agreement in laboratories. As a basis of knowledge sharing between academic laboratories and companies, research priority should be proven in some measure. When a "comprehensive confidential agreement" is concluded between a principal investigator and a member in a laboratory, trade secrets should be well defined. Laboratory notebook, a notebook recording research plans and results every day and having signature of adequate experts, can be used for proving academic priority and defining trade secrets. Laboratory notebook can also be used for management of research proceeding, knowledge fusion, knowledge transmission and determination of inventor or authorship, in a laboratory.
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Hiroyuki TOKIEDA
Article type: Article
Session ID: 0401
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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Takabumi FUKUDA, Shu IZAWA, Naoya KASAI, Kazuyoshi SEKINE
Article type: Article
Session ID: 0402
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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This paper concerns practicable technique to determine the sensor location where the sensor(s) can detect the defect of bearings installed in a machine efficiently. In this paper, the characteristic of the vibration transfer is applied for this purpose. A proposed method is based that the transmissibility of signal by defect is almost same as the impulse signal: i.e. The response of the vibration by bearing defect and the impulse response between bearing and housing are correlation. By the experimental results, the authors show a practical procedure to determine the number and the locations of sensors.
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Hideyuki KOHNO, Hideaki KITAGAWA, Junichi KUSUMOTO, Akihiro KANAYA
Article type: Article
Session ID: 0404
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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Regarding to saving maintenance cost and extending the remain life of boiler facilities, if the amount of damages can be evaluated quantitatively in the early stage by Nondestructive inspection, the facilities can be operated without any unnecessary repair. To make this come true, the facilities should be checked, evaluated, and made the quantitative analysis data on the damages like crack etc. in the early stage. As the second stage of this development of crack measuring technology on steam pipe using the phased array UT technique, We performed measuring and quantitative analysis of test pieces having fatigue cracks.
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Satoshi OKAJIMA, Satoshi IZUMI, Shinsuke SAKAI
Article type: Article
Session ID: 0405
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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The evaluation method for the pipe integrity in the form of failure probability has been developed based on the Bayesian inference method in the previous paper. In this paper, the previous method is extended for the wall-thinning model with the corrosion rate fluctuation. The extension is carried out through following two approaches: correction-term and error-term approaches. After the formulation is shown, effectiveness of the extended method is examined.
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Kiyoshi FUKAYA, Hisao NAGATA
Article type: Article
Session ID: 0406
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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A wearable air-bag system for falls on the floor is being developed. This system consists of fall detection sensors, calculating process unit, and one or two more airbags. which protect heads, buttocks. and backs against the hit on the level floor. The airbag system is especially designed to protect against backward falls, because backward falls are comparatively more risky than forward falls. which means pedestrians can soften hit force by themselves and protectt their heads with upper limbs. Various experiments using a dummy with fixed or non-fixed joints are conducted to evaluate the shock absorption performance of wearable airbags against hit on the level floor. The wearable airbags can considerably reduce hit by falls, but the present capacity of the shock absorption and location and size of wearable airbags should be improved for actual use..
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Tsukasa SHIMAKAWA
Article type: Article
Session ID: 0407
Published: September 07, 2007
Released on J-STAGE: August 01, 2017
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This paper describes the characteristic of M-PAC, large Motor driven Compressor train for Chemical plant. Motor driven Compressor train which be required the high trustworthy shall introduce based on safety designing, confirm hazardous area, SIL class and the torsional torque fluctuation including side band of inverter. M-PAC will propose the new style safety standard model with hazardous & every criteria.
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