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2009 9th International Symposium on Communications and Information Technology, ISCIT 2009

作者： Kasuga, Takeshi Yakubo, Satoshi Department of Electrical Engineering Fukushima National College of Technology Iwaki 970-8034 Japan Advanced Course in Mechanical and Electrical System Engineering Fukushima National College of Technology Iwaki 970-8034 Japan

ISBN: (纸本)9781424445219

This paper presents a highly safe driving control technique using different kinds of sensors and one-way wheels to avoid the rear-end collision and sudden stop of the model vehicle. The basic concept is "sensor diversity" which enables fault tolerant operations. An appropriate combination of different kinds of sensors is introduced to reduce the occurrence of multiple faults. The systematic design of the model vehicle is presented, and the rear-end collision avoidance can be achieved even if a fault occurs at any sensor. Moreover, if the wheel races even if a fault occurs at any motor and then the rotation of the axle stops, a safe driving can be maintained. The important design concept is that a fault makes linearly additive effect with a small value to the final result. In order to meet the requirement, we introduce one-way wheels instead of usual wheels. It is shown in the experiment of driving control of the model vehicle that rear-end collision can be avoided and then safety operations can be achieved. ©2009 IEEE.

关键词： Signal processing

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Highly safe driving control system for model vehicles using different kinds of sensors and one-way wheels

Highly safe driving control system for model vehicles using ...

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International Symposium on Communications and Information Technologies (ISCIT)

作者： Takeshi Kasuga Satoshi Yakubo Department of Electrical Engineering Fukushima National College of Technology Iwaki Japan Advanced Course in Mechanical and Electrical System Engineering Fukushima National College of Technology Iwaki Japan

This paper presents a highly safe driving control technique using different kinds of sensors and one-way wheels to avoid the rear-end collision and sudden stop of the model vehicle. The basic concept is ldquosensor diversityrdquo which enables fault tolerant operations. An appropriate combination of different kinds of sensors is introduced to reduce the occurrence of multiple faults. The systematic design of the model vehicle is presented, and the rear-end collision avoidance can be achieved even if a fault occurs at any sensor. Moreover, if the wheel races even if a fault occurs at any motor and then the rotation of the axle stops, a safe driving can be maintained. The important design concept is that a fault makes linearly additive effect with a small value to the final result. In order to meet the requirement, we introduce one-way wheels instead of usual wheels. It is shown in the experiment of driving control of the model vehicle that rear-end collision can be avoided and then safety operations can be achieved.

关键词： Control system synthesis Vehicle driving Vehicle safety Sensor systems Wheels Collision avoidance Road accidents Vehicle crash testing Vehicles Automobiles

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Image reconstruction from point cloud data by CIP-level set method

Image reconstruction from point cloud data by CIP-level set ...

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SICE Annual Conference

作者： Ishimoto Hironori Ryuzaburo Sugino Noboru Morizumi Advanced Course of Electricity and Control System Engineering Anan National College of Technology Tokushima Japan Systems and Control Engineering Anan National College of Technology Tokushima Japan

Level set method (LSM) is the efficient computation method for the interface capturing with corresponding of advection equation attend topological change of interface. LSM is consisted of the generation of signed distance function from initial interface and the convergence computation of the interface evolution for the target shape using the advection equation in conjunction with the mean curvature flow. We can get the image source from the actual object through the some kinds of distance measurement. The many measured points form the point cloud as the pointing sketch of a object surface. The precision surface model of the object requires that we extract the suitable interface for the purpose from the point cloud data. The extraction is one of image reconstruction. LSM is very useful method to extract the fine surface model from the point cloud data. However, the conventional LSM has some difficulties in the practical computing. In the long time computing, the distance function will be broken up without the frequent reinitialization of it. In this study, we proposed the new computation algorithm in which it is combined the LSM with the CIP scheme. The CIP presents very good performance to keep the shape profile in the advection computing. The obtained results are the various of examples of image reconstruction such as the convex sharp profile, the non-convex profile and the topological changing of profiles. We show the applicability and the effectiveness through the comparison of the CIP scheme with up-wind scheme.

关键词： Image reconstruction Clouds Surface reconstruction Data mining Computer interfaces Equations Shape Level set Convergence Distance measurement

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Design of a Highly Safe Model Vehicle for Rear-End Collision Avoidance Considering Multiple Faults of Sensors

Design of a Highly Safe Model Vehicle for Rear-End Collision...

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International Conference on Computational Intelligence, Modelling and Simulation (CSSIM)

This paper presents design of a highly safe driving control system using different kinds of sensors and its evaluation in order to avoid the rear-end collision of the model vehicle. The feature of the control is that an appropriate combination of sensing information from different kinds of sensors is introduced to reduce the occurrence of multiple faults. It is shown in the results of analysis of numerical values that the reliability of the combination of different kinds of sensors is higher than that of the combination of the same kind of sensors. Moreover, the systematic design of the model vehicle is proposed, and it is also shown in the experiment that the rear-end collision avoidance can be achieved even if a fault occurs at any sensor.

关键词： Vehicle safety Collision avoidance Vehicle driving Sensor systems Signal processing Road accidents Vehicles Mechanical sensors Automobiles Computational modeling

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Nanofabrication of three-dimensional imprint diamond molds by ECR oxygen ion beams using polysiloxane

Nanofabrication of three-dimensional imprint diamond molds b...

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作者： Shuji, Kiyohara Tomoyuki, Kashiwagi Hirofumi, Takikawa Yuichi, Kurashima Yoshio, Taguchi Yoshinari, Sugiyama Electric and Control System Engineering Course Faculty of Advanced Engineering Maizuru National College of Technology 234 Aza Shiroya Maizuru Kyoto 625-8511 Japan Department of Electrical and Electronic Engineering Toyohashi University of Technology Toyohashi Aichi 441-8580 Japan Department of Mechanical Systems Engineering University of Yamanashi 4-3-11 Takeda Kofu Yamanashi 400-8511 Japan Application and Technical Section ELIONIX INC 3-7-6 Motoyokoyama Hachioji Tokyo 192-0063 Japan

We have investigated the nanofabrication of three-dimensional (3D) chemical vapor deposited (CVD) diamond molds in Electron Cyclotron Resonance (ECR) oxygen ion beam etching technologies using polysiloxane [-R2SiO-]n as an electron beam (EB) mask and a room-temperature (RT)-imprint resist material. The polysiloxane exhibited a negative-exposure characteristic and its sensitivity was 5:5 × 10 -5 C/cm2. The maximum etching selectivity of polysiloxane film against diamond film was 4.7, which was obtained under the following ECR oxygen ion etching conditions: ion energy of 400 eV, ion incidence angle of 0 ° , microwave power of 100 W, gas pressure of 1:4 × 10 -2 Pa and stage temperature of 24 ° C. The diamond molds of cone and tetragonal pyramid dots were fabricated with polysiloxane mask in EB lithography technology using the RT-nanoimprint lithography (NIL) process. The dots are 500, 600, 700, 800, 900 nm in diameter and width respectively. The pitch between the dots is 2 μm, and each dot has a height of about 1 μm. It was found that the optimum imprinting pressure and its depth obtained after the press for 5 min were 0.5 MPa and 0.5 μm respectively. The resulting diameter of each imprinted polysiloxane pattern was in good agreement with that of the 3D-diamond mold. We carried out the RT-NIL process for the fabrication of diamond nanopatterns, using the 3D-diamond molds that we developed. © 2009 The Surface Science Society of Japan.

关键词： Room temperature

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Development of a desktop swarm robot system based on pheromone communication

Development of a desktop swarm robot system based on pheromo...

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作者： Kitamura, Naoyuki Nakamichi, Yoshiyuki Fukuda, Koji Advanced Course of Electricity and Control System Engineering Anan National College of Technology 265 Aoki Minobayashi Anan Tokushima 774-0017 Japan Department of Systems and Control Engineering Anan National College of Technology 265 Aoki Minobayashi Anan Tokushima 774-0017 Japan Department of Electronic Control Engineering Gifu National College of Technology 2236-2 Kamimakuwa Motosu Gifu 501-0495 Japan

ISBN: (纸本)9784990288037

Complex and adaptive behavior of population emerges in social insects. Especially in ants, pheromone communication is the key to understanding their swarm intelligence. This paper proposes a swarm robot system based on pheromone communication and reports our current status of development of the robot system. We believe that the system could be used in swarm robotics and complex systems education. ©ISAROB 2009.

关键词： Multipurpose robots

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Development of simplified PAM chlorophyll fluorometer for vegetation condition monitoring

Development of simplified PAM chlorophyll fluorometer for ve...

引用

IEEE International Symposium on Consumer Electronics (ISCE)

作者： Akiko Takeuchi Hidetoshi Yoshida Masaru Shibata Department of Electrical and Electronic Systems Engineering Nagaoka National College of Technology Nagaoka Japan Electrical & Mechanical System Engineering Advanced Course Nagaoka National College of Technology Nagaoka Japan Department of Materials Engineering Nagaoka National College of Technology Nagaoka Japan

Environmental issues are getting widespread international attention. The damage to the plant is immeasurable, too. For monitoring the vegetation conditions, a non-destructive, simplified and low-cost chlorophyll fluorometer was developed. Pulse amplification modulation method and control using programmable logic controller has been employed for that purpose. By measuring the fluorescence from spinach leaf, the performance of the system was checked. It was found that the system was provided empirical data to support theory.

关键词： Vegetation Condition monitoring Fluorescence Pulse modulation Programmable control Light emitting diodes Educational institutions Pulse amplifiers LED lamps Pigments

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Springback properties of single- And poly-crystalline pure aluminum processed by severe plastic deformation

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Keikinzoku/Journal of Japan Institute of Light Metals 2009年第4期59卷 179-184页

作者： Sakai, Takashi Yoshida, Keisuke Koyama, Jun-Ichi Nakamachi, Eiji Department of Mechanical Engineering Takamatsu National College of Technology 355 Chokushi Takamatsu-shi Kagawa 761-8058 Japan Department of Mechanic Electrical System Engineering Advanced Course of Takamatsu National College of Technology Takamatsu-shi Kagawa Japan AMADA Co. Ltd. Japan Biomedical Engineering Faculty of Life and Medical Sciences Doshisha University Kyotanabe-shi Kyoto Japan

A bending tester with an incorporated high-precision angle sensor was developed in this study. Pure aluminum single crystal and polycrystalline materials were used. Bending properties, especially the springback characteristics of materials as-received and fine-grained using AR and ECAP processes, were investigated. The springback characteristics are discussed based on various mechanical properties that were elucidated by tensile and hardness tests. Consequently, the following results were obtained. (1) AR and ECAP cold-processing refined grains of both single crystal and polycrystalline materials with almost no work hardening exhibited increased Vicker's hardness Hv without a decrease in elongation δ, at an equivalent strain Εe of not less than 1.0. (2) The ECAP sample, which underwent many cycles of high strain processing, i.e., being subjected to large equivalent strain Ε, indicated a large springback angle δSB. It also turned out that springback angle increased with an increment of δSB=0.1 per cycle of ECAP processing. (3) Both «ECAP-s [110] and «ECAP-p samples demonstrated a constant springback angle δSB, irrespective of equivalent strain e at a bending angle of not less than δ=95. ( 4) Fine-grained materials show a bigger springback angle δSB than as-delivered materials. Nevertheless, AR and ECAP samples, processed with different strain loading mode, showed little difference in the trend of spring back angle δSB against bending angle δ. (5) Steel materials over a wide range tend to indicate springback angle δSB in direct relation to the « value. However, fine-grained pure aluminum material of this study turned out not to conform to this trend. The result of this series can constitute fundamental data that are useful toward the establishment of a plastic deformation processing method of fine-grained materials.

关键词： Single crystals

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X-Ray Stress Measurement of Titanium Casting Materials 11

X-Ray Stress Measurement of Titanium Casting Materials

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11th World Conference on Titanium, Ti-2007

作者： Shiro, Ayumi Nishida, Masayuki Jing, Tian Advanced Course of Mechanical System engineering Kobe City College of Technology Kobe651-2194 Japan Department of Mechanical engineering Kobe City College of Technology Kobe651-2194 Japan School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China

ISBN: (纸本)9784889034066

Recently, titanium casting technology attracts attention in the industrial fields. These casting metals are including a various residual stresses due to the heat shrinkage and inclusion particles, et al. In order to apply the casting technology, the accurate estimation of residual stresses is desired in many cases. In this study, it aims at the nondestructive stress evaluation of titanium casting material by the X-ray stress measurement technique. At first in this study, the sin2ψ method which used in the usual X-ray stress measurement was tried to measured the residual stresses. However, it was unsuitable for measurement of titanium casting material because of including coarse grains. After corrosion treatment of the sample surface, the coarse crystal grains are observed on surface, and it could be look by the naked eye. Therefore, another X-ray method for single crystal system was employed to coarse crystal grains, in order to investigate the possibilities of residual stress estimating. Four-axes sample table which can set the both of tilt angle and rotate one on the sample surface was prepared. The stereographic diagrams and the theory of elasticity were used to measure the single crystal stresses on the sample surface. © Ti-2007 - Proceedings of the 11th World Conference on Titanium. All Rights Reserved.

关键词： Residual stresses

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Maximum output power control system of variable-speed small wind generators

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IEEJ Transactions on Power and Energy 2007年第4期127卷 559-565+1页

作者： Amano, Yoko Kajiwara, Hiroyuki Advanced Course in Mechanical and Electrical System Engineering Dept. of Mechanical Engineering Fukushima National College of Technology 30 Nagao Tairakamiarakawa Iwaki 970-8034 Japan Dept. of Maritime System Engineering Graduate School of Engineering Kyushu University 744 Motooka Nishiku Fulcuoka 819-0395 Japan Fukushima National College of Technology Japan Kyushu University Japan

This paper proposes a maximum output power control system of variable-speed small wind generators. Paying attention to an optimum rotational speed of a single phase AC wind generator which can obtain maximum output power according to natural wind speed, the proposed method adjusts the rotational speed of the single phase AC generator to the optimum rotational speed. Since this adjustment is realized on line so that it can be adapted for variable-speed wind, a generated power brake links directly with the single phase AC generator, and the rotational speed of the single phase AC generator is adjusted by controlling the current that flows the FET (Field-Effect Transistor) device as the generated power brake. In order to reduce heat loss of the FET device, the PWM (Pulse Width Modulation) controller is introduced. Moreover, the experimental system of the proposed method is constituted and the experiment is performed. Finally, the validity and the practicality of the proposed method are confirmed by experimental results.

关键词： Power control

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