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IEEE Conference on Decision and control

作者： Daniel Coutinho Minyue Fu Carlos E. de Souza Group of Automation and Control Systems Faculty of Engineering Pontifícia Universidade Católica do Rio Grande do Sul Porto Alegre Brazil School of Electrical Engineering and Computer Science University of Newcastle Callaghan NSW Australia Department of Systems and Control Laboratory Nacional de Computação Científica Petropolis Rio de Janeiro Brazil

ISBN: (纸本)9781424431236

A considerable amount of research has been done on the use of logarithmic quantizers for networked feedback control systems. However, most results are developed for the case of a single quantizer (either measurement or control signal quantization). In this paper, we investigate the case of simultaneous input and output quantization for SISO linear output feedback systems. Firstly, we show that the problem of quadratic stabilization via quantized feedback can be addressed with no conservativeness by means of the sector bound approach. Secondly, we provide a bound on the maximal admissible sector bound via a scaled H ¿ optimization problem.

关键词： Output feedback Linear feedback control systems control systems Linear systems Quantization Communication system control Feedback control Communication channels Digital control Bandwidth

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Attitude and Handling Improvements Through Gain-scheduled Suspensions and Brakes control

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IFAC Proceedings Volumes 2008年第2期41卷 2075-2080页

作者： C. Poussot-Vassal O. Sename L. Dugard P. Gáspár Z. Szabó J. Bokor GIPSA-lab Control Systems Department (former LAG) INPG-CNRS-ENSIEG - Domaine Universitaire BP46 38402 Saint Martin d'Hères - Cedex FRANCE Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 H-1111 Budapest HUNGARY

In this paper, the problem of comfort and handling improvements of a ground vehicle is treated through the control of the suspension and braking systems. Two gain-scheduled controllers are synthesized (in the H ∞ framework) to achieve, in the frequency domain, comfort and yaw performances according to the driving situation, observed by the mean of a monitor. The proposed strategy tackles the nonlinear tire braking force in an original way and meets the situation dependent objectives of the vehicle in a unified synthesis. Simulation tests on a complex nonlinear full vehicle model shows improvements of the proposed approach.

关键词： H ∞ Linear Parameter Varying Suspensions Brakes Global Chassis control Anti-locking Braking System Electronic Stability control

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Enhanced Biologically Inspired Model

Enhanced Biologically Inspired Model

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26th IEEE Conference on computer Vision and Pattern Recognition (CVPR 2008), vol.7

作者： Yongzhen Huang Kaiqi Huang Liangsheng Wang Dacheng Tao Tieniu Tan Xuelong Li National Laboratory of Pattern Recognition Institute of Automation Chinese Academy and Sciences Beijing China Biometrics Research Centre Department of Computing Hong Kong Polytechnic University Hong Kong China School of Computer Science and Information Systems Birkbeck University of London London UK

It has been demonstrated by Serre et al. that the biologically inspired model (BIM) is effective for object recognition. It outperforms many state-of-the-art methods in challenging databases. However, BIM has the following three problems: a very heavy computational cost due to dense input, a disputable pooling operation in modeling relations of the visual cortex, and blind feature selection in a feedforward framework. To solve these problems, we develop an enhanced BIM (EBIM), which removes uninformative input by imposing sparsity constraints, utilizes a novel local weighted pooling operation with stronger physiological motivations, and applies a feedback procedure that selects effective features for combination. Empirical studies on the CalTech5 database and CalTech101 database show that EBIM is more effective and efficient than BIM. We also apply EBIM to the MIT-CBCL street scene database to show it achieves comparable performance in comparison with the current best performance. Moreover, the new system can process images with resolution 128 × 128 at a rate of 50 frames per second and enhances the speed 20 times at least in comparison with BIM in common applications.

关键词： Biological system modeling Spatial databases Image databases Brain modeling Object recognition Visual databases Computational efficiency Feedforward systems Feedback Layout

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An Indoor Localization Algorithm for Lighting control using RFID

An Indoor Localization Algorithm for Lighting Control using ...

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IEEE Energy 2030 Conference, ENERGY

作者： Zi-Ning Zhen Qing-Shan Jia Chen Song Xiaohong Guan Department of Automation Tsinghua University Beijing China Center for Intelligent and Networked Systems (CFINS) Tsinghua National Laboratory for Information Science and Technology Department of Automation Tsinghua University Beijing China United Technologies Research Center China and the Tsinghua-UTC Research Institute for Integrated Building Energy Safety and Control Systems Beijing 100084 P. R. China (phone: +86-10-62772183 fax: +86-10-62770554 e-mail: songc@***) SKLMS Laboratory and System Engineering Institute Xi''an Jiaotong University Xi'an China

Occupant's identity and location are important information for lighting control in order to reduce the energy consumption while increasing livelihood. While active RFID system provides occupant's identity, it is nontrivial to localize the occupant's location in an indoor environment due to the multipath effect, the changing environment, and the unreliable communication link. In this paper, we implement a system with multiple active RFID readers, and develop a localization algorithm based on support vector machine (SVM). The algorithm uses round-robin comparison to localize the occupant to one of the multiple regions in a floor. The geometric relationship among the rooms and the historical localization data are used to further improve the localization accuracy. Numerical results demonstrate a high localization accuracy of this algorithm. We hope this work sheds insight on lighting control for energy saving and an increased livelihood.

关键词： Lighting control Radiofrequency identification Energy consumption Active RFID tags Educational institutions Indoor environments Round robin Support vector machines Humans Safety

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Multi-Model Based Fault Detection and Diagnosis of a Hydraulic Servo Axis

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IFAC Proceedings Volumes 2008年第2期41卷 13117-13117页

作者： Marco Muenchhof Technische Universitaet Darmstadt Institute of Automatic Control Laboratory for Control Systems and Process Automation Darmstadt Germany (Tel: +49-6151-16-3114

This contribution describes the design and implementation of a multi-model based fault detection and diagnosis system for a hydraulic servo axis. Multiple models are operated in parallel to the plant - similar to a bank of observers. Beside one model mimicking the fault free process, there are additional models describing the process behavior in the presence of both actuator and process faults. For each model the squared error between the model output and the plant output is determined. The model which (over a period of time) shows the best match with the process is assumed to currently best describe the process behavior. The fault injected into the model with the best match is thus at the same time the diagnosis, i.e. the fault which is assumed to be present in the real system. This system has been tested exhaustively at a testbed. The result of the tests is shown in the accompanying video.

关键词： Hydraulic Actuators Fault Diagnosis Physical Models Video Demonstration

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Research on rough set theory and applications in China

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Lecture Notes in computer Science

作者： Wang, Guoyin Zhang, Qinghua Huang, Houkuan Ye, Dongyi Hu, Qinghua Hu, Xuegang Shi, Zhongzhi Li, Yongli Shang, Lin An, Liping Sai, Ying Chen, Shanben Liang, Jiye Qin, Keyun Zeng, Huanglin Xie, Keming Miao, Duoqian Min, Fan Wu, Zhaocong Wu, Weizhi Dai, Jianhua Institute of Computer Science and Technology Chongqing University of Posts and Telecommunications Chongqing 400065 China School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China College of Math. and Computer Fuzhou University Fuzhou 350002 China Harbin Institute of Technology PO Box 458 Harbin 150006 China School of Computer and Information Hefei University of Technology Hefei 230009 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Lanzhou University No.222 Tianshui South Rd. Lanzhou 730000 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Management Science and Engineering Department Business School Nankai University Tianjin 300071 China Shandong University of Finance No.40 Shun-geng Road Jinan 250014 China Welding Engineering Institute Shanghai Jiaotong University Shanghai 200030 China School of Computer and Information Technology Shanxi University Taiyuan 030006 China Intelligent Control Development Center Southwest Jiaotong University Chengdu 610031 China Artificial Intelligence of Key Laboratory Sichuan University of Science and Engineering Zigong 643000 China Department of Automation College of Information Engineering Taiyuan University of Technology Taiyuan 030024 China 4800 CaoAn Highway Shanghai 201804 China School of Computer Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China School of Remote Sensing Information Engineering Wuhan University Wuhan 430079 China Institute for Information and System Sciences Faculty of Science Xi'an Jiaotong University Xi'an 710049 China Information College Zhejiang Ocean University Zhejiang 316004 China Institute of Artificial Intelligence Zhejiang University Hangzhou 310027 China

ISBN: (纸本)3540850635

This article gives a capsule view of research on rough set theory and applications ongoing at universities and laboratories in China. Included in this capsule view of rough set research is a brief description of the following things: Chinese research groups on rough set with their URLs for web pages, names of principal researchers (supervisors), numbers of graduate students, and topics being investigated. Statistical summaries showing the growth in the research on rough set theory and application in China are included. In addition, an introduction summarizing the research interests of Chinese researchers is included in this article. The contribution of this article is a complete overview of the principal research directions in rough set theory and its applications in China. © 2008 Springer-Verlag Berlin Heidelberg.

关键词： Rough set theory

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Performance evaluation of Kalman filter for fault detection of hydraulic actuators

Performance evaluation of Kalman filter for fault detection ...

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作者： Muenchhof, Marco Isermann, Rolf Laboratory for Control Systems and Process Automation Institute of Automatic Control TU Darmstadt Germany

ISBN: (纸本)9783902661241

In this paper, an Extended Kalman-Bucy-Filter approach for fault detection and diagnosis of an hydraulic servo-axis is presented. The filter improves the results with the EKF as reported in literature since it uses a new model structure, considers nonlinear valve spool displacement-flow relationships and incorporates temperature effects. The performance of the newly proposed architecture is evaluated thoroughly at a testbed in the presence of both process faults and sensor faults. For sensor faults, the smallest reliably detectable sensor fault is determined. The method is finally compared to parity equations and parameter estimation, which have also successfully been applied to the supervision oif hydraulic servo axes. Copyright © 2007 IFAC.

关键词： Fault detection

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Parametric and nonparametric EEG analysis for the evaluation of EEG activity in young children with controlled epilepsy

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Computational Intelligence and Neuroscience 2008年第1期2008卷 462593页

作者： Sakkalis, Vangelis Cassar, Tracey Zervakis, Michalis Camilleri, Kenneth P. Fabri, Simon G. Bigan, Cristin Karakonstantaki, Eleni Micheloyannis, Sifis Department of Electronic and Computer Engineering Technical University of Crete Chania 731 00 Greece Institute of Computer Science Foundation for Research and Technology Heraklion 71110 Greece Department of Systems and Control Engineering Faculty of Engineering University of Malta Msida MSD 2080 Malta Faculty of Engineering Ecological University of Bucharest 061341 Bucharest Romania Clinical Neurophysiology Laboratory Faculty of Medicine University of Crete Heraklion 71409 Greece

There is an important evidence of differences in the EEG frequency spectrum of control subjects as compared to epileptic subjects. In particular, the study of children presents difficulties due to the early stages of brain development and the various forms of epilepsy indications. In this study, we consider children that developed epileptic crises in the past but without any other clinical, psychological, or visible neurophysiological findings. The aim of the paper is to develop reliable techniques for testing if such controlled epilepsy induces related spectral differences in the EEG. Spectral features extracted by using nonparametric, signal representation techniques (Fourier and wavelet transform) and a parametric, signal modeling technique (ARMA) are compared and their effect on the classification of the two groups is analyzed. The subjects performed two different tasks: a control (rest) task and a relatively difficult math task. The results show that spectral features extracted by modeling the EEG signals recorded from individual channels by an ARMA model give a higher discrimination between the two subject groups for the control task, where classification scores of up to 100% were obtained with a linear discriminant classifier.

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A new approach in urban traffic control systems

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Periodica Polytechnica Transportation Engineering 2007年第1-2期35卷 3-13页

作者： Varga, István Bokor, József Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 H-1111 Budapest Hungary Department of Control and Transport Automation Budapest University of Technology and Economics Bertalan L. u. 2 H-1111 Budapest Hungary

The paper proposes some new methods for traffic control systems design. The goal was to find solutions that make possible to give constraints in course of the estimation process of the road traffic parameters and the traffic controller system design. The proposed solutions are built on the constrained Moving Horizon Estimation and the Fault Detection Filter technique.

关键词： Traffic control

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Approximation and Complexity Trade-off by TP model transformation in controller Design: A case study of the TORA system

Approximation and Complexity Trade-off by TP model transform...

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8th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics, CINTI 2007

作者： Petres, Zoltán Baranyi, Péter System and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Hungary

The main objective of the paper is to study the approximation and complexity trade-off capabilities of the recently proposed Tensor Product Distributed Compensation (TPDC) based control design framework. The TPDC is the combination of the TP model transformation and the Parallel Distributed Compensation (PDC) framework. The TP model transformation includes an HOSVD based technique to solve the approximation and complexity trade-off. In this paper we generate TP models with different complexity and approximation properties, and then we derive controllers for them. We analyze how the trade-off effects the model behavior and control performance. All these properties are studied via the state feedback controller design of the Translational Oscillations with an Eccentric Rotational Proof Mass Actuator (TORA) System.

关键词： controllers

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