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29th Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBS 2007), vol.10

作者： Vaclav Chudacek Milan Petrik George Georgoulas Miroslav Cepek Lenka Lhotska Chrysostomos Stylios Gerstner laboratory at Department of Cybernetics Czech Technical University Czech Republic Czech Republic Department of Cybernetics Center for Machine Perception Czech Technical University Czech Republic Intelligent Control Systems Laboratory Georgia Technology Research Institute Atlanta USA Czech Republic Department of Computer Science and Engineering Neural Computing Group Czech Technical University Czech Republic Czech Republic Department of Cybernetics Gerstner Laboratory Czech Technical University Czech Republic Department of Informatics and Communications Technology TEI Epirus Artas Greece

In this work we present a comparative study, testing selected methods for clustering and classification of holter electrocardiogram (ECG). More specifically we focus on the task of discriminating between normal 'N' beats and premature ventricular 'V' beats. Some of the tested methods represent the state of the art in pattern analysis, while others are novel algorithms developed by us. All the algorithms were tested on the same datasets, namely the MIT-BIH and the AHA databases. The results for all the employed methods are compared and evaluated using the measures of sensitivity and specificity.

关键词： Electrocardiography Testing Decision trees Laboratories Cybernetics Sensitivity and specificity Heart rate variability Clustering algorithms Spatial databases Computational complexity

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Advances in Telerobotics 1

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丛书名： Springer Tracts in Advanced Robotics

2007年

作者： Manuel Ferre Rafael Aracil Martin Buss Claudio Melchiorri Carlos Balaguer

ISBN: (数字)9783540713647

ISBN: (纸本)9783540713630;9783642425929

At the dawn of the new millennium, robotics is undergoing a major transformation in scope and dimension. From a largely dominant industrial focus, robotics is rapidly expanding into the challenges of unstructured environments. Interacting with, assi- ing, serving, and exploring with humans, the emerging robots will increasingly touch people and their lives. The goal of the new series of Springer Tracts in Advanced Robotics (STAR) is to bring, in a timely fashion, the latest advances and developments in robotics on the basis of their signi cance and quality. It is our hope that the wider dissemination of research developments stimulates exchanges and collaborations among the research community and contributes to further advancement of this rapidly growing eld. The edited volume by Manuel Ferre, Martin Buss, Rafael Aracil, Claudio M- chiorri and Carlos Balaguer is focused on the most recent advances in telerobotics, a technology that deals with the inclusion of a human operator in the control loop of a remote robot. Telerobotics encompasses an area at the crossroads of several scienti c disciplines such as mechatronics, control, communication, computers, sensor-based recognition, multimodality and even teleoperation through Internet.

关键词： control, Robotics, Mechatronics Artificial Intelligence Systems Theory, control

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Pulse method measurements for determination of line fault location

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Archives of Electrical engineering 2006年第217-218期55卷 301-312页

作者： Tarczyński, WiesLaw Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology

This article presents an analysis of how pulses in the long two-conductor coupled lines with conductor screened interact mutually. The interaction of pulses appears in those places of the line, where there is a change of wave impedance causing a change in reflection coefficient for pulses moving along the line. An exemplary analysis is performed for a homogenous lossless line at its starting and terminal points. The results of analysis are analytical expressions describing quantitative interactions of pulses. The expressions are verified both by computer simulation and by measurements of the real line. There has been performed the analysis of influence of the resistances with which the terminal points of the line are loaded onto the amplitude value of the pulses registered at the starting point of the line. The new method and the new system of measurements of pulses have been proposed that minimize the interaction of pulses at the starting point of the line, disadvantageous for the process of fault location by using pulse method.

关键词： Electric fault currents

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Determination of regulation characteristics of switched reluctance motors for quasi-optimal operation

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Archives of Electrical engineering 2006年第217-218期55卷 313-324页

作者： Tomczewski, Krzysztof Wach, Piotr Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology

The paper presents regulation characteristics that fulfill the requirements of highest possible efficiency and strongly reduced torque ripple level. For switched reluctance motors it is not so simple and obvious, because the regulation characteristics depend on three variables: phase voltage, switch-on and switch-off angles. For this reason in a steady state the same operation point (Tl, ω) of the mechanical characteristic is attainable for quite different values of those control parameters. So there is a field for quasi-optimal operation and the choice of the coresponding control parameters is the main subject of this work. The paper presents also the method to determine these quasi-optimal control characteristics from simple tests or from computations based on presented simple mathematical model.

关键词： Reluctance motors

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Active vibration control of flexible structures using genetic optimisation

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Journal of Low Frequency Noise Vibration and Active control 2006年第3期25卷 195-207页

作者： Hashim, S. Z. Mohd Tokhi, M.O. Darus, I. Z. Mat Department of Computer Science University Technology Malaysia Malaysia Department of Automatic Control and Systems Engineering University of Sheffield Sheffield SI 3JD Mappin Street United Kingdom Department of Mechanical Engineering University Technology Malaysia Malaysia

This paper presents an investigation into the development of an adaptive control mechanism for vibration suppression of flexible beam structures using genetic algorithms (GAs). The global search technique of GA is used to estimate the controller transfer function, based on one-step-ahead prediction. An active vibration control (AVC) system is designed utilizing a single-input single-output (SISO) control structure to yield optimum cancellation of broadband vibration at an observation point along the beam. The mean-squared error of observed deflection is adopted as the fitness function and randomly selected controller parameters are optimised for different, arbitrarily chosen order to fit to the system by applying the working mechanism of GA. The global search technique of the GA is utilised to obtain the best parameters among all attempted orders for the controller. The GA-AVC algorithm thus developed is implemented within the simulation environment of a flexible beam structure and simulation results are presented to assess the performance of the system, with different types of excitation namely pseudo-random binary sequence, uniform random and finite duration step signals. It is noted that, the system performance is satisfactory and significant amount of vibration reduction over a broad range of frequencies of the input signal is achieved.

关键词： Adaptive active vibration control Flexible beam Genetic algorithm

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Optimal deployment of distributed passive measurement monitors

Optimal deployment of distributed passive measurement monito...

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2006 IEEE International Conference on Communications, ICC 2006

作者： Chengchen, Hu Bin, Liu Zhen, Liu Shifang, Gao Dapeng, Wu Dept. of Computer Science and Technology Tsinghua University Beijing China Dept. of Automatic Control Northwest Polytechnical University Xi'an Shaanxi China Dept. of Electrical and Computer Engineering University of Florida Gainesville FL United States

ISBN: (纸本)1424403553

Flow-level traffic measurement is important for network management. The widely used centralized per-flow measurement faces a great challenge due to the demanding requirement on both memory bandwidth and memory size within a single traffic monitor. This paper addresses the issue of deploying a Distributed Passive Measurement System (DPMS) in a large scale network;specifically, we study how to optimally place traffic monitors and sample stochastic traffic flows, so that the probability of a packet being sampled (a.k.a. measurement coverage) is maximized. We formulate this problem as a Stochastic Chance Constrained Optimization (SCCO) problem;and we propose a Hybrid Intelligent (HI) algorithm to solve this problem. The HI algorithm consists of two major components, namely, uncertain function approximation and genetic algorithm. Equipped with the HI algorithm, we are able to address the optimal tradeoff between measurement coverage and deployment cost for networks with random traffic, which has not been studied before. Our simulations and experiments demonstrate the effectiveness of our algorithm, i.e., a small deployment cost or a small number of monitors are sufficient to maintain a high level of measurement coverage. © 2006 IEEE.

关键词： Telecommunication traffic

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Nonlinear internal model control for hysteresis systems

Nonlinear internal model control for hysteresis systems

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2006 IEEE International Conference on Networking, Sensing and control, ICNSC'06

作者： Yonghong, Tan Miyong, Su Laboratory of Intelligent Systems and Control Engineering Guilin University of Electronic Technology Guilin 541004 China Xidian University China Department of Computer Science Guilin University of Electronic Technology Guilin 541004 China

ISBN: (纸本)1424400651

A hybrid model used to approximate hysteresis and creep nonlinear system is proposed. This model is constructed by a weighted superposition of both backlash operators and creep operators. Then, the corresponding inverse models for both hysteresis and creep are developed. Based on the obtained models, a nonlinear internal model control strategy is applied to the control of system with hysteresis and creep nonlinearities. © 2006 IEEE.

关键词： Nonlinear control systems

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Implementation of Listing's Law for a Tendon Driven Robot Eye

Implementation of Listing's Law for a Tendon Driven Robot Ey...

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2006 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Giorgio Cannata Marco Maggiali Mechatronics and Automatic Control Laboratory Department of Communications Computer and System Science University of Genova Genoa Italy Mechatronics and Automatic Control Laboratory Italian Institute of Technology University of Genova Genoa Italy

This paper presents a model for a tendon driven robot eye designed to emulate the actual saccadic and smooth pursuit movements performed by human eyes. Physiological saccadic motions obey the so called Listing's law which constrains the admissible eye's angular velocities. The paper discusses conditions making possible to implement the Listing's law on a purely mechanical basis, i.e. without active control

关键词： Tendons Muscles Intelligent robots Mechatronics automatic generation control Laboratories Pulleys Feedback Motion control Robotics and automation

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A Mixed H2/H∞ control Problem with controller Degree Constraint

A Mixed H2/H∞ Control Problem with Controller Degree Constr...

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IEEE Conference on Decision and control

作者： Ningbo Yu Li Qiu Automatic Control Laboratory ETH Zurich Zurich Switzerland Department of Electronic & Computer Engineering Hong Kong University of Science and Technology Hong Kong China

ISBN: (纸本)1424401704;9781424401703

In this paper, we consider a special mixed H 2 /H ∞ optimal control problem which is to obtain the optimal H 2 controller under H ∞ norm and controller degree constraints for an SISO plant. The H ∞ norm constraint on the controller is to achieve a certain level of closed-loop stability robustness against the gap metric, nu-gap metric, or normalized coprime factor uncertainties. The degree constraint requires the degree of the controller to be bounded by that of the plant. We first characterize the set of all feasible stabilizing controllers that meet both the degree and H ∞ norm constraints in terms of a finite dimensional convex set. We then carry out an optimization over the convex parameter set to find the controller that gives the optimal H 2 transient performance. Examples and observations are presented, and comparisons with the results obtained by other H 2 /H ∞ mixed optimization methods are made

关键词： Optimal control Hydrogen Upper bound Robust stability Robust control Feedback Attenuation measurement Riccati equations Centralized control USA Councils

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Adaptive Predictive control of Nonlinear System Base on Multi-layer Recursive Method

Adaptive Predictive Control of Nonlinear System Base on Mult...

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World Congress on Intelligent control and Automation (WCICA)

作者： Qiubin Luo Qiuming Li Rupeng Feng Department of Computer Harbin University Harbin China Department of Control Science and Engineering Harbin Institute of Technology Harbin China Department of Automatic Test and Control Harbin Institute of Technology Harbin China

An adaptive predictive control method is presented for nonlinear discrete system by introducing multi-layer recursive method into the predictive control strategy. In this method, nonlinear system is substituted with a time-varying linear system firstly, and then multi-layer recursive is used to identify and to forecast the varied parameters in order to get the predictive output of system model. At last, adaptive predictive control is designed for the original nonlinear system. The simulation results show the effectiveness of the presented method

关键词： Programmable control Adaptive control Predictive control Nonlinear systems automatic control Nonlinear control systems control systems automatic testing System testing Time varying systems

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