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15th World Congress of the International Federation of Automatic control, 2002

作者： Yu, Xinghuo Zhihong, Man Feng, Yong Guan, Zhihong Faculty of Informatics and Communication Central Queensland University RockhamptonQLD4702 Australia School of Computer Engineering Nanyang Technological University Singapore Singapore Department of Electrical Engineering Harbin Institute of Technology Harbin150006 China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei430074 China

ISBN: (纸本)9783902661746

In this paper, a nonsingular terminal sliding mode concept is introduced for the control of a class of nonlinear dynamical systems. This nonsingular terminal sliding mode control not only enables the Lnite time convergence of the system equilibrium, but also eliminates the singularity problem associated with conventional terminal sliding mode control. Simulations are presented to show the effectiveness of the design. Copyright © 2002 IFAC.

关键词： Sliding mode control

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Multicast partitioning protocol designs for WDM optical star networks

Multicast partitioning protocol designs for WDM optical star...

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MILCOM, Military communications Conference

作者： Ho-Ting Wu Shunyong Huang Kai-Wei Ke Department of Computer Science and Information Engineering National Taipei University of Technology Taipei Taiwan Institute of Computer Communication and Control Engineering National Taipei University of Technology Taipei Taiwan

ISBN: (纸本)0780376250

We first propose a simple and efficient multicast partitioning protocol, called Lookback protocol, for employment in an asynchronous WDM single optical star network. Network nodes use random access schemes to send reservation packets over a dedicated packet reservation channel. A central traffic scheduler is allocated to coordinate message transmissions. It executes the Look-back scheduling scheme in real time by searching (back into the input queue) for a candidate multicast message that can be received by all of the intended recipients. Such an approach effectively reduces the head-of-line blocking effects. Performance results conducted via simulations have shown that networks employing such scheduling, mechanisms can exhibit superior network throughput levels and delay performances. To apply this mechanism to a wider range of networking environments, we further consider an inlet-connected dual-star architecture and propose the Modified Lookback (Mlookback) mechanism. By using a simple heuristic approach, the Mlookback scheme is able to successfully, exploit the inter-data channels and properly utilize the wavelength reuse property of the intra-data channels. Performance results have demonstrated the merits of deploying the underlying Mlookback multicast algorithm in such a dual-star structure.

关键词： Multicast protocols Optical design Wavelength division multiplexing WDM networks Optical fiber networks Access protocols Employment Telecommunication traffic Traffic control Throughput

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Feedback error learning control using adaptive fuzzy network to control one linear actuator hopping robot

Feedback error learning control using adaptive fuzzy network...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： S. Kuswadi A. Takahashi A. Ohnishi M. Sampei S. Nakaura Mechanical and Environmental Informatics Tokyo Institute of Technology Tokyo Japan SONY Ericsson Mobile Communication Tokyo Japan Mechanical and Control Engineering Tokyo Institute of Technology Tokyo Japan

This paper addresses the control method of one linear actuator hopping robot in a plane by using feedback error learning scheme. Adaptive fuzzy network was used in this scheme, and backpropagation techniques utilized as learning algorithm. The robot consists of a body and a leg, which are in contact with a sufficiently wide horizontal ground; both are fixed rigidly. We consider utilizing the starting time of actuation of actuator - when the robot is in stance phase - to control the gait. By simulation, continuous hopping gait was realized.

关键词： Linear feedback control systems Error correction Adaptive systems Programmable control Adaptive control Fuzzy control Hydraulic actuators Robots Backpropagation algorithms Legged locomotion

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Space-time block codes in Doppler spread channel

Space-time block codes in Doppler spread channel

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Antennas and Propagation Society International Symposium

作者： Ding-Bing Lin Bing-Hung Chiang Jung-Lang Yu Institute of Computer Communication and Control National Taipei University of Technology Taiwan Department of Electronic Engineering Fu Jen Catholic University Taiwan

Space-time block codes (STBC) can obtain full transmit diversity gain in a slow-fading environment. But it is not the case for STBC in a fast-fading channel where the estimator can not trace the channel variation instantaneously. This will cause decoding in error and hence the system performance is degraded. In this paper, we evaluate the performance degradation in a Doppler spread channel by computer simulation. Finally, we propose linear interpolation to trace the channel variation, and the performance can then be improved.

关键词： Block codes Transmitting antennas Decoding Degradation Fading Receiving antennas Diversity methods Computer simulation Diversity reception Analytical models

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A quantitative method to evaluate the performance of hyperspectral data fusion

A quantitative method to evaluate the performance of hypersp...

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IEEE Instrumentation and measurement technology Conference

作者： Qiang Wang Yi Shen Ye Zhang Dept. of Control Science and Engineering Harbin Institute of Technology Harbin P.R. China Dept. of Electronics and Communication Engineering Harbin Institute of Technology Harbin P. R. China

Hyperspectral data fusion technique is the focus of hyperspectral data processing in recent years. Many fusion methods have been proposed, but little research work has been done to evaluate the performances of different data fusion methods. In order to meet the urgent need, a new method called quantitative correlation analysis is proposed in this paper. With this method, the performances of different fusion methods can be compared and analyzed directly based on the data of before and after the data fusion take place. The experiment results show that the new method is effective and the comparative results conform to the application results.

关键词： Hyperspectral imaging Hyperspectral sensors Performance analysis Performance evaluation Quantum cellular automata Data processing Remote sensing Image fusion communication system control Focusing

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NONSINGULAR TERMINAL SLIDING MODE control OF A CLASS OF NONLINEAR DYNAMICAL SYSTEMS

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IFAC Proceedings Volumes 2002年第1期35卷 161-165页

作者： Xinghuo Yu Man Zhihong Yong Feng Zhihong Guan Faculty of Informatics and Communication Central Queensland University Rockhampton QLD 4702 Australia School of Computer Engineering Nanyang Technological University Singapore Department of Electrical Engineering Harbin Institute of Technology Harbin 150006 China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China

In this paper, a nonsingular terminal sliding mode concept is introduced for the control of a class of nonlinear dynamical systems. This nonsingular terminal sliding mode control not only enables the £nite time convergence of the system equilibrium, but also eliminates the singularity problem associated with conventional terminal sliding mode control. Simulations are presented to show the effectiveness of the design.

关键词： Sliding modes £nite time nonlinear systems stability

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Determination of the workspace of a new coordinate-measuring machine using parallel-link mechanism

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Journal of Harbin institute of technology(New Series) 2001年第2期8卷 147-154页

作者：刘得军黄庆成叶东车仁生周琳 Dept. of Electrical Engineering Daqing Petroleum Institute Dept. of Automatic Measurement and Control Harbin Institute of Technology The Metal Engraving Factory of Yunnan Province

Presents the detailed algorithm established for determination of workspace for a 3-DOF coordinate measuring machine using parallel link mechanism by constructing the inverse kinematic model first and then reviewing the physical and kinematical constraints from the structural characteristics of the parallel link mechanism, and discusses the actual geometries of workspace and the factors having effect on workspace through computer simulation thereby providing necessary theoretical basis for the research and development of coordinate measuring machines using parallel link mechanism.

关键词： coordinate measuring machine workspace parallel link mechanism three degrees of freedom spatial coordinate

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Optimization of HMM by the tabu search algorithm 14

Optimization of HMM by the tabu search algorithm

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14th Conference on Computational Linguistics and Speech Processing, ROCLING 2001

作者： Mei, Xiao-Dan Sun, Sheng-He Pan, Jeng-Shyang Chen, Tsong-Yi Dept. of Automatic Test Measurement and Control Harbin Institute of Technology China Dept. of Electronic Engineering National Kaohsiung University of Applied Sciences Taiwan

In this paper, the tabu search algorithm is employed to train Hidden Markov Model (HMM) to search out the optimal parameter structure of HMM for automatic speech recognition. The proposed TS-HMM training provided a mechanism that allows the searching process to escape from the local optimum and obtain a near global optimum. Experimental results show that the TS-HMM training has a higher probability to find the optimal model parameters than the traditional algorithms. © 2001 Proceedings of the 14th Conference on Computational Linguistics and Speech Processing, ROCLING 2001. All rights reserved.

关键词： Global optimum Hidden Markov Model Speech recognition Tabu search

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Multi-agent based distributed measurement systems in CORBA environment

Multi-agent based distributed measurement systems in CORBA e...

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IEEE Instrumentation and measurement technology Conference

作者： Xiaochuan Luo Dejun Liu Dong Ye Rensheng Che Chengcai Cui Department of Automatic Measurement and Control Harbin Institute of Technology Harbin Heilongjiang China Department of Electrical Engineering Daqing Petroleum Institute Anda Heilongjiang China

ISBN: (纸本)0780366468

This paper proposes the MACE - a multi-agent based distributed measurement architecture in CORBA environment used to develop intelligent distributed measurement system for remote control and monitoring of instruments over a network such as the Internet and Ethernet. The architecture is characterized by interoperability, collaboration and intelligence by means of CORBA and multi-agent technologies. The paper describes the architecture and exemplifies it by a common project.

关键词： Intelligent agent Instruments Computer architecture Electric variables measurement Intelligent systems IP networks Multiagent systems control systems Collaboration Area measurement

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Research on the theory and the virtual prototype of 3-DOF parallel-link coordinate-measuring machine

Research on the theory and the virtual prototype of 3-DOF pa...

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IEEE Instrumentation and measurement technology Conference

作者： Dejun Liu Rensheng Che Zifang Li Xiaochuan Luo Department of Electrical Engineering Daqing Petroleum Institute Anda Heilongjiang China Department of Automatic Measurement and Control Harbin Institute of Technology Harbin Heilongjiang China

ISBN: (纸本)0780366468

Firstly, this paper describes the structure, measuring theory and characteristics of a new kind of coordinate measuring machine (CMM) using parallel-link mechanism with three spatial degrees of freedom (3-DOF). Then, the measuring model of it is established according to the theory of spatial mechanics, and the workspace of the probe is calculated and verified by computer simulation. Finally, the virtual prototype of the new CMM is studied by using the graphics functions in OpenGL graphics library based on Windows 98 and Visual C++ 6.0. This research lays the foundation for manufacturing the real prototype of the parallel-link CMM.

关键词： Virtual prototyping Coordinate measuring machines Probes Electric variables measurement Kinematics Length measurement Position measurement Mechanical variables measurement Computer simulation Computer graphics

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