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作者： Kohzu, Masahide Hironaka, Tomoya Nakatsuka, Shota Saito, Naobumi Yoshida, Fusahito Naka, Tetsuo Okahara, Haruo Higashi, Kenji Department of Materials Science Graduate School of Engineering Osaka Prefecture University Sakai 599-8531 Japan Chubu Center National Institute of Advanced Industrial Science and Technology Nagoya 462-8510 Japan Department of Mechanical System Engineering Graduate School of Engineering Hiroshima University Higashihiroshima 739-8527 Japan Department of Maritime Technology Yuge National College of Maritime Technology Yuge 794-2593 Japan Corporate Planning Office Kasatani Co. Ltd. Osaka 532-0036 Japan Osaka Prefecture University Research and Development Lab. Daido Steel Co. Ltd. Nagoya 457-8545 Japan

The mechanical properties and formability of AZ31 magnesium alloy strips having different textures were investigated at a high strain rate based on that occuring in mass production by press forming. Forming at a high strain rate on the order of 100 s-1 requires a high temperature of over 473 K. To obtain accurate stress-strain curves, a high-speed testing machine that can maintain a constant true strain rate was used, and the change in gauge length on a test piece in a furnace was measured during the testing time of about 0.5 s. For the specimens, rolled strips consisting of fine grains (about 10 μm) and an extruded strip consisting of coarse grains (about 40 μm) were used. The {0001} textures of the extruded strip and one of the rolled strips were strongly oriented parallel to the rolled surface, but the texture of another rolling strip had two peaks that were inclined at 5-15 deg in front of and behind the rolling direction. At the high strain rate of 100 s-1, elongation decreased for every specimen. Nevertheless, a limiting drawing ratio (LDR) of 2.1-2.2 was obtained under uniform heating above 503 K in all the specimens except for the extruded strip. The high LDR of the rolled strip having a two-peak texture was maintained in forming at temperatures down to 473 K, in contrast to the LDR of the strongly oriented rolled strip, which reduced rapidly when formed at temperatures less than 503 K. © 2007 The Japan Society for technology of Plasticity.

关键词： Magnesium alloys

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A motor selection technique for designing a manipulator

A motor selection technique for designing a manipulator

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Changhwan Choi Seungho Jung Seokhwan Kim Jeongyeob Lee TokSon Choe Sangchul Chung Yongwoon Park Nuclear Fuel Cycle Remote Technology Laboratory Korea Atomic Energy Research Institute Daejeon South Korea Nuclear Robitics Lab Korea Atomic Energy Research Institute Daejeon South Korea UGV Part Advanced Research Team Research & Development Center Rotem Company Limited Cheonan South Korea Agency for Defence Development Daejeon South Korea

This paper presents a servo motor selection technique for a manipulator design. Straete et al. 's normalization method is adopted and is improved. The improvements are as follows: First, an equivalent output power lines are plotted at the same load curve, which gives another selection criterion. Second, a temperature based criterion is proposed for the continuous limit, which estimates the steady state winding temperature of a motor, and can be used to determine a suitable motor and gear ratio. This formulation gives not only the selection of a motor and gear ratio, but also gives the estimated operating temperature.

关键词： Servomechanisms Servomotors Actuators Temperature Manipulators Torque Gears Power generation State estimation Steady-state

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The Digital Anti-windup LQG/LTR Controller Design for a Two Axis Gimbal System

The Digital Anti-windup LQG/LTR Controller Design for a Two ...

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2007 International Conference on Control, Automation and Systems (ICCAS 2007), vol.2

作者： Ki-Jun Seong Ho-Gyun Kang Bo-Yeon Yeou Ho-Pyeong Lee Gumi Engineering Lab LIGNEX1 Company Limited Gumi Gyeongbuk South Korea Advanced Technology Research Center Agency for Defence Development Daejeon South Korea

To track the target on dynamic platforms such as an aircraft, a vehicle, and guided missile, servo structure, which includes external track loop for sights stabilization and internal speed loop, is needed. Recently, stabilization platform gets smaller. The main issue of small gimbal system, for example, is its low performance of stabilization. LQG/LTR controller is applicable as one of the problem methods. We have designed digital LQG/LTR controller with anti-windup function, in order to avoid degradation loop capacity of stabilization due to actuator saturation, when high electric power is transferred to stabilization loop, which is internal pointing loop.

关键词： LQG/LTR Gimbal Anti-windup Stabilization Loop

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Dependence of the light emission characteristics on the Ne gas pressure in an electron-beam-pumped light source using a field emitter

Dependence of the light emission characteristics on the Ne g...

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作者： Shiozawa, Kazufumi Neo, Yoichiro Okada, Morihiro Kume, Hiroshi Matsumoto, Takahiro Ikedo, Tomoyuki Takahashi, Masafumi Hashiguchi, Gen Mimura, Hidenori Research Institute of Electronics Shizuoka University 3-5-1 Johoku Hamamatsu 432-8011 Japan Advanced Technology Research Lab. Nippon Steel Corporation 20-1 Sintomi Futtu 293-851 Japan National Institute for Environmental Studies 16-2 Onokawa Tsukuba 305-8506 Japan Research and Development Center Stanley Electric Corporation 1-3-1 Eda-Nishi Aoba Yokohama 225-0014 Japan Ikedo Electric Limited 80 Morita-cho Hamamatsu 430-8048 Japan Faculty of Engineering Kagawa University 2217-20 Hayashi-cho Takamatsu 761-0396 Japan

The dependence of the light intensity on the gas pressure was investigated in an electron-beam-pumped-light source using a graphite nanoneedle field emitter, a Si electron-transparent film and a Ne gas. A spot-like light emission and a background light emission are observed in at a Ne gas pressure less than 0.4 atm, while the back ground light emission disappears and the light emission becomes a completely spot with increasing the gas pressure. These experimental results are explained by the Monte-Calro simulation of electron trajectories inside the gas cell. On the other hand, the light intensity almost saturates at a gas pressure of 0.4 atm and dose not increase with increasing the gas pressure. The Monte-Calro simulation suggests that the saturation of the light intensity is due to the increase of the excited Ne atoms losing their energy without light emission.

关键词： Light sources

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The stabilization loop design for a two-axis gimbal system using LQG/LTR controller

The stabilization loop design for a two-axis gimbal system u...

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2006 SICE-ICASE International Joint Conference

作者： Seong, Ki-Jun Kang, Ho-Gyun Yeo, Bo-Nyeo Lee, Ho-Pyeong Gumi Engineering Lab. Technology Group5 Nex1future Co.Ltd Gumi Gyeongbuk Korea Republic of Advanced Technology Research Center Agency for Defense Development Daejeon Korea Republic of

ISBN: (纸本)8995003855

The control theory has been developed variously from traditional PID control to modern Fuzzy & Neural control. PID controller, nevertheless, is still widely used in the industry field. Its structure is very simple, easy to deal with and applied broadly. It does not need mathematical model in system, either. However, all the systems contain non-linear structure and they get more complicated as industries are developing and it is limited to adopt PID controller. Therefore, one of the alternatives is LQG/LTR controller. This paper shows stabilization loop design of two axis gimbal system. We have designed LQG/LTR controller in gimbal system and applied them to the system and compared them with Lead-PI controller that was used to gimbal system before. © 2006 ICASE.

关键词： Control equipment

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development of high performance multi-layer process with H2 plasma hardening

Development of high performance multi-layer process with H2 ...

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55th Society of Polymer Science Japan Symposium on Macromolecules

作者： Ishibashi, Takeo Ono, Yoshiharu Yamaguchi, Atsumi Hanawa, Tetsuro Tadokoro, Masahiro Yoshikawa, Kazunori Yonekura, Kazumasa Okumura, Haruki Matsunobe, Tsuyoshi Fujii, Yasushi Tanaka, Takeshi Terai, Mamoru Kumada, Teruhiko Renesas Technology Corp. Process Development Dept. 664-0005 Hyogo Japan Materials Science Lab. Toray Research Center Inc. 3-3-7 Otsu Shiga 525-8567 Japan Tokyo Ohka Kogyo Co. Ltd. Advanced Material Development Division 1 Research and Development Department 1590Tabata Samukawa-machi Koza-gun Kanagawa 253-0014 Japan Advanced Tech. R/D Center Mitsubishi Electric Corp. 8-1-1 Tsukaguchi-Honmachi Amagasaki Hyogo 661-8661 Japan

In the device manufacture after 45nm node utilization of a high precision carbon hard mask (C-HM) process is an important issue. We examined additional H2 plasma hardening treatment to the bottom organic layer in a conventional multi-layer resist process. Improved results in LWR caused by etching, which is called "wiggling", were obtained. Chemical constitution was analyzed to understand the mechanism of improvement. Analyses were carried out using GSP+FTIR and Raman spectroscopy. This hardening process will provide a very versatile C-HM process that is useful not only FEOL but also BEOL, which includes Dual Damascene process with via hole filling by the bottom organic layer.

关键词： Multilayers

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Wireless QoS for high-speed CDMA packet cellular systems - With radio-condition-aware admission control and resource allocation reflected multistage scheduling

Wireless QoS for high-speed CDMA packet cellular systems - W...

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作者： Umeda, Narumi Chen, Lan Kayama, Hidetoshi NTT DoCoMo Inc. Yokosuka-shi 239-8536 Japan DoCoMo Beijing Communication Laboratories Co. Ltd. China Wireless Broadband Technology Group Research and Development Planning Department Japan Advanced Wireless Lab. DoCoMo Beijing Communication Laboratories China IEEE Innovation Radio Transmission Lab. DoCoMo Beijing Communication Laboratories Co. Ltd. China

Supporting diversified rates for real-time communications will become possible and essential with the rapidly increasing transmission rates provided by the 4th generation (4G) mobile communication systems. In this paper, a novel wireless Quality of Service (QoS) scheme suitable for broadband CDMA packet cellular systems with adaptive modulation coding is proposed and its characteristics are described. The proposed QoS scheme comprises several control factors laid on the MAC and RRC layers, and can be harmonized with IP-QoS. Two important control factors are proposed: radio-condition-aware admission control and resource allocation reflected multistage scheduling. Computer simulations and testbed experiments indicate that by using the radio-condition-aware admission control, stable and guaranteed service can be provided to real-time users regardless of the interference and the variation in the location of the mobile station. Moreover, resource allocation reflected multistage scheduling maintains guaranteed rates for real-time users and provides high resource utilization efficiency for best-effort users. Consequently, by using the proposed wireless QoS scheme, it is possible to provide users with high quality and diversified real-time services, on a packet based radio network for enhanced 3G and beyond. Copyright © 2006 The Institute of Economics, Information and Communication Engineers.

关键词： Wireless telecommunication systems

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Application of a collaboration platform to the computer graphics compositing process in digital cinema production

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NTT Technical Review 2006年第7期4卷 34-37页

作者： Imaizumi, Fumitoshi Kitagawa, Takeshi Mori, Minoru Shin, Takeshi NTT East Bunkyo-ku Tokyo 112-0004 Japan Broadband Business Development Division NTT East Media Business Headquarters NTT Advanced Technology NTT Media Lab. NTT Learning Systems

With the use of computer graphics (CG) compositing in movie production increasing day by day, we analyze the current issues concerning CG compositing by examining Toei Film's latest production "Yamato" as an example and explain the improved production efficiency that could be achieved in future through the use of the collaboration platform developed by NTT East.

关键词： Computer graphics

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Fabrication of Novel Graphite Field Emitters and their Application to an Electron Beam Pumped Light Sources

Fabrication of Novel Graphite Field Emitters and their Appli...

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International Symposium on Discharges and Electrical Insulation in Vacuum

作者： K. Shiozawa Y. Neo M. Okada H. Kume T. Matsumoto T. Ikedo M. Takahashi G. Hashiguchi H. Mimura Research Institute of Electronics Shizuoka University Hamamatsu Japan Advanced Technology Research Lab. Nippon Steel Corporation Futtu Japan National Institute for Environmental Studies Tsukuba Japan Research and Development Center Stanley Electric Company Limited Yokohama Japan Research and Development Center Stanly Electric Corporation Yokohama Japan Ikedo Electric Limited Hamamatsu Japan Faculty of Engineering Kagawa University Takamatsu Japan

ISBN: (纸本)1424401917;9781424401918

We have fabricated novel sputter-induced carbon nanoneedle field-emitters and Si electron-transparent films for application to electron-beam-pumped light sources. The sputter-induced carbon nanoneedle field-emitters exhibited a stable electron emission of 10 muA at an average field of 6V/mum. The 1.5mum-thick Si electron-transparent films achieved an electron transmittance of about 60% at an acceleration voltage of 27kV. An electron-beam-pumped light source was successfully demonstrated by the excitation of rare gases such as Ne, Ar, Kr and Xe

关键词： Fabrication Electron beams Light sources Carbon dioxide Semiconductor films Electron emission Acceleration Voltage Gases Argon

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Fabrication of novel graphite field emitters and their application to an electron beam pumped light sources

Fabrication of novel graphite field emitters and their appli...

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22nd International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV

作者： Shiozawa, K. Neo, Y. Okada, M. Kume, H. Matsumoto, T. Ikedo, T. Takahashi, M. Hashiguchi, G. Mimura, H. Research Institute of Electronics Shizuoka University 3-5-1 Johoku Hamamatsu 432-8011 Japan Advanced Technology Research Lab. Nippon Steel Corporation 20-1 Sintomi Futtu 293-8511 Japan National Institute for Environmental Studies 16-2 Onokawa Tsukuba 305-8506 Japan Research and Development Center Stanly Electric Corporation 1-3-1 Eda-Nishi Aoba Yokohama 225-0014 Japan Ikedo Electric Limited 80 Morita-cho Hamamatsu 430-8048 Japan Faculty of Engineering Kagawa University 2217-20 Hayashi-cho Takamatsu 761-0396 Japan

ISBN: (纸本)1424401925

We have fabricated novel sputter-induced carbon nanoneedle field-emitters and Si electron-transparent films for application to electron-beam-pumped light sources. The sputter-induced carbon nanoneedle field-emitters exhibited a stable electron emission of 10A at an average field of 6V/μm. The 1.5m-thick Si electron-transparent films achieved an electron transmittance of about 60% at an acceleration voltage of 27kV. An electron-beam-pumped light source was successfully demonstrated by the excitation of rare gases such as Ne, Ar, Kr and Xe. © 2006 IEEE.

关键词： Electron beams

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