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A 'kane's dynamics' model for the active rack isolation system. Part 2: Non-linear model development, verification and simplification

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International Journal of Vehicle systems Modelling and Testing 2007年第3期2卷 227-251页

作者： Hampton, R. David Beech, Geoffrey S. Subba Rao, Nagendra N. Rupert, Jason K. Kim, Young K. Civil and Mechanical Engineering Department US Military Academy West Point NY 10996 United States Vehicle Analysis Branch Spacecraft and Vehicle Systems Department NASA Marshall Space Flight Center Huntsville AL 35812 United States Zama Shi Sagamigaoka-1-34-20 Granero Yosiyama-201 Japan Simulation and Analysis Section Missile and Aviation Systems Department Dynetics Inc. 1000 Explorer Boulevard Huntsville AL 35806 United States Control Systems Design and Analysis Branch Flight Mechanics and Analysis Division NASA Marshall Space Flight Center Huntsville AL 35812 United States

Boeing's Active Rack Isolation System (ARIS) isolates microgravity space-science experiments on the International Space Station (ISS) against station-induced disturbances, at the level of the International Standard Payload Rack (ISPR). Part 1 of this documentation presented a linearised model of ARIS, hand-developed via Kane's method. Part 2, below, reports the use of software packages to develop and verify a corresponding non-linear model, without umbilicals. The model is first verified against a 'truth' model, then linearised to match the model of Part 1, and finally simplified using reasonable negligible-inertia assumptions. The resulting models all show nearly identical, and physically reasonable, dynamical responses. Copyright © 2007, Inderscience Publishers.

关键词： Microgravity

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AN EXTENDED 316L STAINLESS STEEL MODEL SUITABLE FOR INDUSTRIAL ROLLING

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IFAC Proceedings Volumes 2007年第11期40卷 305-310页

作者： M.F. Abbod M. Mahfouf D.A. Linkens C.M. Sellars IMMPETUS Institute for Microstructural and Mechanical Process Engineering: The University of Sheffield School of Engineering and Design Brunel University West London UK Department of Automatic Control and Systems Engineering University of Sheffield UK Department of Engineering Materials University of Sheffield UK

During hot rolling processes, the material under deformation undergoes different deformation conditions, i.e. temperature changes and strain rates. One particular variable is the change in strain rate which can vary from low to very high values in industrial rolling. Usually empirical models are used for predicting the material characteristics but they are only valid within constrained limits. In this work an extended model has been developed to predict the stress/strain characteristics of 316L stainless steel material under a wider range of deformation conditions, i.e. high strain rates changes which do not follow the equation-of-states laws.

关键词： 316L stainless steel dynamic recrystallisation non-equation-of-states strain rate plane strain compression test

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MULTI-MODAL SIMULATION FOR MICROSTRUCTURAL AND PROPERTY PREDICTION FOR AL ALLOY HOT ROLLING

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IFAC Proceedings Volumes 2007年第11期40卷 119-124页

作者： D.A. Linkens T Wong M.F. Abbod M. Mahfouf J. Talamantes-Silva IMMPETUS Institute for Microstructural and Mechanical Process Engineering The University of Sheffield Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD UK School of Engineering and Design Brunel University UK Sheffield Forgemasters UK

This study presents the application of FE modelling and intelligent systems techniques to the prediction of microstructural mapping for aluminium alloys. Here, the material within each finite element is defined using a set of non-linear physically-based equations. These are then solved in real-time using a semi-physical grey-box model. This model is based on a neuro-fuzzy approach and it has been embedded within the FE technique. The model maps the evolution of the internal state variables (i.e. dislocation density, subgrain size and subgrain boundary misorientation) and their effect on the recrystallisation behaviour of the stock. This paper presents the model development, the integration between the numerical techniques, and the application of the technique to a hot rolling operation using an Aluminium, 1wt% Magnesium alloy. In addition, the developed model includes a CA (Cellular Automata) level to represent inhomogeneous nature of microstructural beheviour.

关键词： hybrid modelling finite element hot rolling neuro-fuzzy microstructure recrystallisation

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Hot Rolled Aluminium Alloys Texture via Hybrid Modelling

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IFAC Proceedings Volumes 2007年第11期40卷 437-442页

作者： M. Mahfouf D.A. Linkens M.F. Abbod J. Talamantes-Silva IMMPETUS Institute for Microstructural and Mechanical Process Engineering The University of Sheffield Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD UK School of Engineering and Design Brunel University UK Sheffield Forgemasters UK

During the thermomechanical processing of aluminium alloys, the material experiences a complex history of temperature, time, and strain path. The rolling and deformation process has an effect on the evolution of the material texture which can be modelled using finite element models of the rolling process and a Taylor model for texture evolution. This paper explores the potential of modelling the rolling and texture evolution processes using data-driven systems models to reduce the computational time and achieve better accuracy.

关键词： aluminium alloys texture hybrid modelling

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A New Research Field and A New Society, Complex Medical engineering

A New Research Field and A New Society, Complex Medical Engi...

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2007 IEEE/ICME International Conference on Complex Medical engineering-CME2007(CME2007 第二届国际复合医学工程学术大会)

作者： Jinglong Wu Mark Hallett Department of Intelligent Mechanical Systems Faculty of Engineering Kagawa University Hayashi-cho Human Motor Control Section Medical Neurology Branch NINDS NIH 10 Center Drive MSC 1428 Bethesd

The human neural mechanism is a complex system. The solution of many neuroscience complex problems involves highly coordinated and highly interdisciplinary research efforts between neuroscientists and biomedical engineers. The neuroscience and the biomedical engineering are melded into a new international society, known as Institute of Complex Medical engineering (ICME). Complex Medical engineering (CME) consists of neuroscience, neurology, biomedical robotics and biomedical informatics, using medical and engineering methods to understand the complex system of human neural mechanisms, and to apply the basic findings to technology. The goal of ICME is to establish a new forum for this interdisciplinary field of neuroscientists and biomedical engineers to discuss their investigations in same conference (symposium), and publish their research work in one periodical. The CME can bridge the gap between medicine & engineering and science & technology. The CME focuses on the complex problems in the medicine and engineering fields, and tries to solve their problems in order to find simple theories and unique tools to help us to reach new understanding and help develop better methods of improving patients' lives.

关键词： Biomedical engineering Biomedical imaging Neuroscience Medical diagnostic imaging Humans Nervous system Optical control Biomedical computing Biomedical optical imaging Biomedical informatics

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TRACKING control IN THE PRESENCE OF NONLINEAR DYNAMIC FRICTIONAL EFFECTS: ROBOT EXTENSION

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Asian Journal of control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

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Abstracts for the 6th Congress of Asian Sleep Research Society

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Sleep and Biological Rhythms 2009年第4期7卷 A1-A49页

作者： Seog Ju Kim In Kyoon Lyoo Yu-Jin Lee Do-Un Jeong Hirohiko Kanai Masanori Ookubo Atsushi Yoshimura Masako Okawa Noto Yamada Takeshi Munezawa Yoshitaka Kaneita Yoneatsu Osaki Hideyuki Kanda Tadahiro Ohtsu Masumi Minowa Kenji Suzuki Susumu Hijuchi Hiroyuki Suzuki Takashi Ohida Takashi Abe Yoko Komada Shoichi Asaoka Yuichi Inoue Jin-Seong Lee Sang-Yong Cho Deependra Kumar Hruda N. Mallick Velayudhan M. Kumar Mahesh K. Kaushik Akihiro Karashima Noiihiro Katayama Mitsuyuki Nakao Ravindra P. Nagendra Sathiamma Sulekha Sathyaprabha T. Narasappa Pradhan Nityanadan Bindu M. Kutty M. Nirmala P. N. Ravindra Basavaraj Ramappa Tubaki T. N. Sathyaprabha D. Sudhakar G. S. Lavekar C. R. Chandrashekar Kazuyoshi Kitaoka Mika Shimizu Sachiko Chikahisa Kazuo Yoshizaki Hiroyoshi Sei Jong-Won Kim Misa Takegami Shin Yamazaki Yasuaki Hayashino Rei Ono Koji Otani Miho Sekiguchi Shinichi Konno Shunichi Fukuhara Antonia J. Jakobson Paul Fitzgerald Russell Conduit Xin Shirley Li Siu Ping Joyce Lam Wai Man Mandy Yu Yun Kwok Wing Kazue Okamoto-Mizuno Koh Mizuno Mituaki Yamamoto Shuichiro Shirakawa Hirokazu Doi Mikako Kato Kazuyuki Shinohara Masako Tamaki Shiori Matsuda Katsuo Yamazaki Tadao Hori Keiko Ogawa Kazumi Takahashi Kunio Kitahama Katuo Yamazaki Yoshimasa Koyama Kohei Shioda Yugo Ueda Yukiko Nakamura Clara Inoue Kazushige Goto Sunao Uchida Yuko Morita Yoshiko Honda Tohru Kodama Mari Hagihara Toru Nakajima Masato Saito Yoshihiko Koga Shinichiro Tanaka Hiroshi Yamadera Madoka Takahara Sachiko Suwa Minoru Onozuka Sadao Sato Fumiharu Togo Taiki Komatsu Takeshi Mitani Jongbae Choi Bin Zhang Taeko Sasai Hiromi Mitsubayashi Mitsuhiro Ohtsu Isao Hasegawa Tatsuya Ishii Akira Komori Asami Suzuki Yue Nakahara Mitsuyasu Hiroki Mariko Nakauma Nobuo Someya Tomomasa Ochiai Shouhei Komori Rayleigh Ping-Ying Chiang Zai-Ting Yeh Seong T. Kim Seung H. Yoon Jeong S. Kwon Jong H. Choi Hyung J. Ahn Youngsoo Kim Bolortuya Yunren Lichao Chen Radhika Basheer Robert W. Mccarley Robert E. Strecker Makoto Honda Tetsuaki Arai Miyuki Fukazawa Yutaka Honda Kuniaki T Department of Psychiatry Gachon University of Medicine and Science Incheon Republic of Korea Department of Psychiatry Seoul National University Seoul Republic of Korea Department of Neuropsychiatry and Center for Sleep and Chronobiology Seoul National University Hospital Seoul Republic of Korea Department of Neuropsychiatry Seoul National University Hospital Seoul Republic of Korea Seoul National University Hospital Seoul Republic of Korea Department of Psychiatry Shiga University of Medical Science Otsu Japan Division of Public Health Department of Social Medicine Nihon University School of Medicine Tokyo Japan Department of Public Health Nihon University School of Medicine Tokyo Japan Division of Environmental and Preventive Medicine Department of Social Medicine Faculty of Medicine Tottori University Yonago Japan Department of Hygiene and Preventive Medicine Fukushima Medical University Fukushima Japan Department of Public Health Showa University School of Medicine Tokyo Japan Faculty of Humanities Seitoku University Matsudo Japan Section on Behavioral Science Division of Clinical Research National Hospital Organization Kurihama Alcoholism Center Yokosuka Japan Department of Otolaryngology Second Hospital Fujita Health University Nagoya Japan National Hospital Organization Kurihama Alcoholism Center Kanagawa Japan Metropolitan Police Department Criminal Investigation Laboratory Tokyo Japan Japan Somnology Center Neuropsychiatrie Research Institute Tokyo Japan Department of Somnology Tokyo Medical University Tokyo Japan Japan Somnology Center Neuropsychiatric Research Institute Tokyo Japan Department of Somnology Tokyo Medical and Dental University Tokyo Japan Center for Sleep and Chronobiology Department of Psychiatry and Behavioral Science Seoul National University College of Medicine Seoul Republic of Korea Department of Psychiatry and Behavioral Science Center for Sleep and Chronobiology Seoul Republic of Korea Department of Physiology Al

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Application of digital filter based motion command preconditioning methods for vibration suppression of a flexible truss with densely spaced modes

Application of digital filter based motion command precondit...

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13th International Congress on Sound and Vibration 2006, ICSV 2006

作者： Glossiotis, George N. Antoniadis, Ioannis A. National Technical University of Athens Department of Mechanical Engineering Mechanical Design and Control Systems Division 9 Hereon Polytechniou Str. 15773 Athens Greece

ISBN: (纸本)9781627481502

The motion of flexible structures excites transient and residual vibrations and for this reason numerous command preconditioning techniques have been developed, with various degrees of effectiveness concerning vibration suppression. The basic aspect that these methods have to confront is the contradicting requirements between the speed of response of the system and the robustness to variations of its natural frequencies. Among those command-preconditioning methods, Finite Impulse Response (FIR) filters can present an extremely robust behavior, combined with the introduction of the minimum possible delay. This optimal combination renders FIR filters applicable in a wide range of engineering applications, where wide bands of structural resonances are excited. Such a typical flexible truss is considered, characterized by wide bands of dense clusters of eigenfrequencies. The constructed truss is attached to the end point of a hydraulic Cartesian manipulator, by the use of which the motion commands are generated. A FIR filter based preconditioning scheme is implemented for the motion control of the system. The corresponding experimental results demonstrate that the filtered commands effectively suppress the excited vibrations, covering in the best possible way all the excited modes of the structure.

关键词： FIR filters

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Optimal tuning of a biaxial servomechanism using a cross-coupled controller and disturbance observers

Optimal tuning of a biaxial servomechanism using a cross-cou...

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21st Annual Meeting of the American Society for Precision engineering, ASPE 2006

作者： Jang, Min-Soo Kim, Seung-Chul Chung, Sung-Chong Department of Mechanical Design and Production Engineering Hybrid Systems Design and Control Laboratory Hanyang University SungdongGu Seoul 133-791 Korea Republic of

ISBN: (纸本)1887706410

In order to improve the contouring accuracy of a biaxial servomechanism and the robustness against disturbance, a cross-coupled controller with a disturbance observer is studied, as well as the optimal tuning based on the integrated design methodology is proposed. Strict mathematical modeling and identification process of a servomechanism are performed first. An optimal tuning problem is formulated as a nonlinear constrained optimization problem including the relevant controller parameters of a servomechanism. The objective of the optimal tuning procedure is to minimize both contour error and settling time while satisfying constraints, such as relative stability and overshoots, etc. The effectiveness of the proposed optimal tuning procedure is verified through experimental results.

关键词： Constrained optimization

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Iterative design of control systems: An approach to overcome the resonant effect on heat exchangers

Iterative design of control systems: An approach to overcome...

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作者： Romero, Julio-Ariel Campo, Antonio Albertos, Pedro Navarro-Esbrí, Joaquín Department of Industrial Systems Engineering and Design Universitat Jaume I Spain Department of Mechanical Engineering University of Vermont United States Department of Systems Engineering and Control Polytechnic University of Valencia Spain Department of Mechanical Engineering and Construction Universitat Jaume I Spain

ISBN: (纸本)9783902661197

This paper deals with the control of the heat exchangers. Due to the resonant effect on this systems, simplified lumped parameters models obtained from the step response can be not enough appropriate to controller design if high performance is required. To design the control, instead of looking for a precise heat exchanger model obtained through complex experiments and sophisticated parameter estimation methods, the use of an iterative approach is suggested.

关键词： Heat exchangers

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