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A new hardware-in-the-loop platform for the evaluation of adaptive lighting systems

IFAC Proceedings Volumes 2008年第2期41卷 4446-4451页

作者： A. Opfermann T. Bertram D. Baum P. Karas Chair for Control Systems Engineering Faculty of Electrical Engineering and Information Technology Universität Dortmund D-44221 Dortmund Germany (Tel: +49/231/755-3592 Hella KGaA Hueck & Co. D-59555 Lippstadt Germany

In this paper a new hardware-in-the-loop platform for the evaluation of adaptive lighting systems is presented. A standard industrial robot is actuated with input data from a vehicle dynamics simulation in order to position a pair of active frontlighting headlamps mounted at the tool center point. With this setup test drives can be simulated repeatedly under well-defined environmental conditions at any time. A visual measurement system is presented that tracks the dynamic light distribution and thus provides data that can be related to subjective impressions by means of statistical analysis tools.

关键词： adaptive systems automatic testing automotive cameras dynamic behaviour evaluation light robotic manipulators vehicle dynamics

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Possible adaptive control by tangent hyperbolic fixed point transformations used for controlling the Φ6-Type Van der Pol Oscillator

Possible adaptive control by tangent hyperbolic fixed point ...

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ICCC 2008 - IEEE 6th International Conference on Computational Cybernetics

作者： Tar, József K. Bitó, János F. Rudas, Imre J. Kozlowski, Krzysztof R. Tenreiro Machado, José A. Budapest Tech John Von Neumann Faculty of Informatics Inst. of Intelligent Engineering Systems Bécsi út 96/B Budapest H-1034 Hungary Poznan University of Technology Computing Science and Management Chair of Control and Systems Engineering ul. Piotrowo 3a 60-965 Poznan Poland Institute of Engineering of Porto Department of Electrotechnical Engineering Rua Dr. Antonio Bernardino de Almeida 4200-072 Porto Portugal

ISBN: (纸本)9781424428755

In this paper a further step towards a novel approach to adaptive nonlinear control developed at Budapest Tech in the past few years is reported. Its main advantage in comparison with the complicated Lyapunov function based techniques is that its fundament is some simple geometric consideration allowing to formulate the control task as a Fixed Point Problem for the solution of which various Contractive Mappings can be created that generate Iterative Cauchy Sequences for Single Input - Single Output (SISO) systems. These sequences can converge to the fixed points that are the solutions of the control tasks. Recently alternative potential solutions were proposed and sketched by the use of special functions built up of the "response function" of the excited system under control. These functions have almost constant values apart from a finite region in which they have a "wrinkle" in the vicinity of the desired solution that is the "proper" fixed point of these functions. It was shown that at one of their sides these fixed points were repulsive, while at the opposite side they were attractive. It was shown, too, that at the repulsive side another, so called "false" fixed points were present that were globally attractive, with the exception of the basins of attraction of the "proper" ones. This structure seemed to be advantageous because no divergences could occur in the iterations, the convergence to the "false" values could easily be detected, and by using some ancillary tricks in the most of the cases the solutions could be kicked from the wrong fixed points into the basins of attraction of the "proper ones". It was expected that via adding simple rules to the application of these transformations good adaptive control can be developed. However, due to certain specialties of these functions practical problems arose. In the present paper novel transformations are presented that seem to evade these difficulties. Their applicability is illustrated via simulations in the ad

关键词： Lyapunov functions

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A novel railway signal control system based on the internet technology and an assurance technology

A novel railway signal control system based on the internet ...

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28th International Conference on Distributed Computing systems Workshops, ICDCS Workshops 2008

作者： Kunifuji, Takashi Miura, Tadao Kogure, Gen Sugahara, Hiroyuki Matsumoto, Masayuki Research and Development Center of JR East Group East Japan Railway Company Kita-kuSaitama-shiSaitama331-8513 Japan Train Control Systems Signalling and Telecommunications Technology Division Railway Technical Research Institute Kita-kuSaitama-shiSaitama331-8513 Japan Electrical and Signal Network System Dep. East Japan Railway Company 2-0Nisshin-cho Kita-kuSaitama-shiSaitama331-8513 Japan

ISBN: (纸本)9780769531731

We have developed a novel railway signal control system that works as a distributed system. It consists of a central control unit (called LC) and terminal devices (called FC) that are distributed at the railroad wayside and operate signal devices. The Internet technologies and optical LAN technologies have been used as communication methods between the LC and the FCs. The FC is a distributed terminal device that has its own processor and placed at the railroad wayside to control the field signal devices. The LC is a centralized computer device that has software arranged by the function of the field devices. An optical network system and multiple communication paths between the LC and the FCs realize robust transmissions. Moreover, the assure performance of controls and transmissions have been investigated, and the autonomous distributed signal control system is also discussed as the next steps of the system. © 2008 IEEE.

关键词： controllers

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Algorithms to Managing Unicast, Multicast and Broadcast Transmission for Optical Switches

Algorithms to Managing Unicast, Multicast and Broadcast Tran...

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The 11th Asia-Pacific network Operations and Management Symposium

作者： Dawid Zydek Leszek Koszalka Iwona Pozniak-Koszalka Keith J. Burnham Dept. of Electrical and Computer Engineering University of NevadaLas VegasUSA Chair of Systems and Computer Networks Wroclaw University of Technology50-370 WroclawPoland Control Theory and Applications Centre Coventry UniversityCV1 5FB CoventryUnited Kingdom

This paper deals with an optical switching problem concerning an architecture represented by input-output request matrix. New algorithms such as LS, Q-family and J-family are presented and thoroughly studied. J-family algorithms are some modifications of the well known Double algorithm. The study focuses on comparison between the considered algorithms and known algorithms such as Double and Exact. The local comparison criteria consist of the number of decomposed matrices, the number of empty slots, the total time of decomposition and excess. As the global index of performance the weighted penalty is introduced, which comprises local criteria. The properties of the proposed algorithms are shown on examples, where matrices with various elements are decomposed into permutation matrices (switch configurations). An idea of experimentation system and some results of investigations are presented. The properties of the considered algorithms are discussed, especially significant results for LS algorithm are described.

关键词： network transmission, algorithm, experimentation system

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A Novel Railway Signal control System Based on the Internet technology and an Assurance technology

A Novel Railway Signal Control System Based on the Internet ...

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International Conference on Distributed Computing systems Workshop

作者： Takashi Kunifuji Tadao Miura Gen Kogure Hiroyuki Sugahara Masayuki Matsumoto Research and Development Center of JR East Group East Japan Railway Company Limited Japan Train Control Systems Signalling and Telecommunications Technology Division Railway Technical Research Institute Japan Electrical & Signal Network System Department East Japan Railway Company Limited Saitama Saitama Japan

ISBN: (纸本)9781424431755

关键词： Signal control system Logical controller E-PON Field controller Optical LAN

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A railway signal control system by optical LAN and design simplification

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Journal of networks 2008年第7期3卷 8-15页

作者： Kunifuji, Takashi Nishiyama, Jun Sugahara, Hiroyuki Okada, Tetsuya Fukuta, Yamato Matsumoto, Masayuki Research and Development Center of JR East Group East Japan Railway Company Saitama Japan Train Control Systems Signalling and Telecommunications Technology Division Railway Technical Research Institute Kokubunji Japan Mito Branch Office East Japan Railway Company Mito Japan Electrical and Signal Network System Dep. East Japan Railway Company Tokyo Japan

When replace railway interlocking devices, setting up of large number of signal cables and confirming of wiring connections are required. So, it is worried that serious transport disorder caused by human error in wiring works would occur. We have developed a railway signal control system utilized optical LAN to reduce the signal cables and wiring works. Moreover, all signal devices operate independently, designers have to handle all devices one by one and pay great attention to avoid causing harmful influence each other. We propose the data-driven method to make easy to replace interlocking device. This logic is rearranged according to the field device in order to simplify and decrease design duties of designe rs. In this paper, we introduce this system, and describe network transmission, safety-related communication and software configuration of the system. © 2008 Academy Publisher.

关键词： control systems

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Dynamic file grouping for load balancing in streaming media clustered server systems

Dynamic file grouping for load balancing in streaming media ...

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International Conference on Information Acquisition, ICIA 2007

作者： Jiang, Qi Xi, Hong-Sheng Yin, Bao-Qun Network Communication Systems and Control Laboratory University of Science and Technology of China Hefei 230027 China

ISBN: (纸本)1424412196

A dynamic file grouping strategy is presented to address the load balancing problem in streaming media clustered server systems. This strategy increases the server cluster availability by balancing the workloads among the servers within a cluster. Additionally, it improves the access hit ratio of cached files in delivery servers to alleviate the limitation of I/O bandwidth of storage node. First, the load balancing problem is formulated as a two layer semi-Markov switching state-space control process. Then, a gradient-based reinforcement learning algorithm is proposed to optimize the grouping policy online. This analytic model captures the behaviors of streaming media clustered server systems accurately, and is with constructional flexibility and scalability. By utilizing the features of the event-driven policy, the proposed optimization algorithm is adaptive and with less computational cost. Simulation results demonstrate the effectiveness of the proposed approach. ©2007 IEEE.

关键词： Reinforcement learning

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A New control Algorithm for Robot with Joint Flexibility

A New Control Algorithm for Robot with Joint Flexibility

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IEEE Conference on control technology and Applications (CCTA)

作者： Piotr Sauer Krzysztof Kozlowski Chair of Control and Systems engineering Poznań University of Technology Poznan Poland

This paper considers a new control algorithm for robot with elastic joints. The proposed algorithm requires only position signals measurements. This algorithm is an extension of the control algorithm proposed by Loria and Ortega in [10]. We have assumed that model in [10] has in addition dynamic friction components on both link and motor sides. We have incorporated harmonic drives into our system. We have developed for the proposed model of manipulator an adaptive version of the control algorithm based on Lyapunov stability theory. This algorithm ensures that the tracking error posses desirable convergence property: semiglobal convergence to an arbitrarily small neighbourhood of zero in the presence of bounded disturbance.

关键词： Robot control control systems Adaptive control Friction Actuators Programmable control Elasticity Position measurement Manipulator dynamics Convergence

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Dynamic File Grouping for Load Balancing in Streaming Media Clustered Server systems

Dynamic File Grouping for Load Balancing in Streaming Media ...

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International Conference on Information and Automation (ICIA)

作者： Qi Jiang Hong-Sheng Xi Bao-Qun Yin Network Communication Systems and Control Laboratory University of Science and Technology Hefei China

关键词： Load management Streaming media File servers Clustering algorithms Bandwidth Cache storage Process control Learning Scalability Computational efficiency

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NONLINEAR network STRUCTURES FOR FEEDBACK control

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Asian Journal of control 2008年第4期1卷

作者： F.L. Lewis Dept. of Electical Engineering The University of Texas at Arlington U.S.A. F. L. Lewis was born in Wärzburg. Germany subsequently studyning in Chile and Goruonstoun School in Scotland. He obtained the Bachelor's Degree in Physics/Electrical Engineering and the Master's of Electrical Engineering Degree at Rice University in 1971. He spent six years in the U.S. navy serving as Navigator aboard the frigate USS Trippe (FF-1075) and Executive Officer and Acting Commanding Officer aboard USS Salinan (ATF-161). In 1977 he received the Master's of Science in Aeronautical Engineering from the University of West Florida. In 1981 he obtained the Ph.D. degree at The Georgia Institute of Technology in Atlanta where he was employed as a professor from 1981 to 1990 and is currently an Adjunct Professor. He is a Professor of Electrical Engineering at The University of Texas at Arlington where he was awarded the Moncrief-O'Donnell Endowed Chair in 1990 at the Automation and Robotics Research Institute. Dr. Lewis has studied the geometric analytic and structural properties of dynamical systems and feedback control automation. His current interests include robotics intelligent control neural and fuzzy systes nonlinear systems and manufacturing process control. He is the author/co-author of 2 U.S. patents 124 journal papers 20 chapters and encyclopedia articles 210 refereed conference papers seven books: Optimal Control Optimal Estimation Applied Optimal Control and Estimation Aircraft Control and Simulation Control of Robot Manipulators Neural Network Control High-Level Feedback Control with Neural Networks and the IEEE reprint volume Robot Control. Dr. Lewis is a registered Professional Engineer in the State of Texas and was selected to the Editorial Boards of International Journal of Control Neural Computing and Applications and Int. J. Intelligent Control Systems. He is the recipient of an NSF Research Initiation Grant and has been continuously funded by NSF since 1982. Since 1991 he has received $1.8 m

A framework is given for controller design using Nonlinear network Structures, which include both neural networks and fuzzy logic systems. These structures possess a universal approximation property that allows them to be used in feedback control of unknown systems without requirements for linearity in the system parameters or finding a regression matrix. Nonlinear nets can be linear or nonlinear in the tunable weight parameters. In the latter case weight tuning algorithms are not straightforward to obtain. Feedback control topologies and weight tuning algorithms are given here that guarantee closed-loop stability and bounded weights. Extensions are discussed to force control, backstepping control, and output feedback control, where dynamic nonlinear nets are required.

关键词： Intelligent feedback control neural networks neural network structures basis function networks fuzzy control fuzzy-neural networks universal approximation adaptive nonparametric control learning control systems

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