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Classifier Selection for Locomotion Mode Recognition Using Wearable Capacitive Sensing Systems 2

2nd International Conference on Robot Intelligence Technology and Applications, RiTA 2013

作者： Song, Yi Zhu, Yating Zheng, Enhao Tao, Fei Wang, Qining Intelligent Control Laboratory College of Engineering Peking University Beijing100871 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Beijing Engineering Research Center of Intelligent Rehabilitation Engineering Beijing100871 China

ISBN: (纸本)9783319055817

Capacitive sensing has been proven valid for locomotion mode recognition as an alternative of popular electromyography based methods in the control of powered prostheses. In this paper, we analyze the characteristics of the capacitive signals and extract suitable feature sets to improve the recognition accuracy. Then the classification results of different classifiers are compared and one optimal classifier which can offer highest accuracy within a reasonable time limit is selected. Experimental results show that the recognition accuracy of the wearable capacitive sensing system has been improved by using the selected classifier. © Springer International Publishing Switzerland 2014.

关键词： Electromyography

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Finite-time stability and stabilization of Itô stochastic time-varying systems 33

Finite-time stability and stabilization of Itô stochastic t...

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Proceedings of the 33rd Chinese control Conference, CCC 2014

作者： Yan, Zhiguo Zhang, Weihai Lin, Zhongwei School of Electrical Engineering and Automation Qilu University of Technology Jinan Shandong250353 China College of Electrical Engineering and Automation Shandong University of Science and Technology Qingdao Shandong266590 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer Engineering North China Electric Power University Beijing102206 China

ISBN: (纸本)9789881563842

This paper deals with the finite-time stability and stabilization for continuous-time linear stochastic time-varying systems. Several necessary and sufficient conditions and a sufficient condition for finite-time stability are derived. Moreover, a sufficient condition for the existence of state feedback controller is given. Such results involve the feasibility problems of differential linear matrix inequalities with terminal constraint. © 2014 TCCT, CAA.

关键词： Stochastic systems

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An intelligent hybrid BFO-PSO algorithm for multi-loop robust controller design in discrete-time networked control systems

An intelligent hybrid BFO-PSO algorithm for multi-loop robus...

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International Conference on Mechatronics and control, ICMC 2014

作者： Jiaqi, Liu Xianlin, Huang Xiaojun, Ban Gao, X.Z. Zenger, K. Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin China Department of Electrical Engineering and Automation Aalto University Espoo Finland

ISBN: (纸本)9781479925384

In this paper, the effectiveness of hybrid bacteria foraging optimization (BFO) algorithm and particle swarm optimization (PSO) algorithm have been tested for multi-loop robust controller design in discrete-time networked control systems (NCSs). Of particular interest is the case that varying transmission delays and varying transmission intervals in NCSs cause the optimal function to be nonconvex and even the gradient is not easily computed. The new intelligent hybrid BFO-PSO algorithm is employed to search for the optimal controller parameters, and then to minimize the constrained object function subject to robust control specifications by using a randomized technique is developed which does not need any gradient information. For this purpose, we first extend the results in robust controller synthesis via parameter-dependent Lyapunov function, where the study of interplay between the stability and robust performance of NCSs feedback loops are investigated. Next, the hybrid BFO-PSO algorithm is introduced to minimize the robust control function with communication constraints. Finally, the proposed method is applied to some typical numerical examples. Simulation results show that the system oscillations are effectively damped by the proposed approach. © 2014 IEEE.

关键词： Networked control systems

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Application of Graph Segmentation Method in Thermal Camera Object Detection

Application of Graph Segmentation Method in Thermal Camera O...

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International Conference on Methods and Models in automation and Robotics

作者： Hung V. NGUYEN Linh Hoai TRAN Department of Automation Control Institute of Science and Technology Hanoi Vietnam School of Electrical Engineering Hanoi University of Science and Technology Hanoi Vietnam

ISBN: (纸本)9781479987023

The paper presents the application of graph-based segmentation algorithm in image object detection. The input images are taken from thermal camera for night surveillance application. The graph-based algorithm was selected due to its low complexity, which allows us to process each image with the complexity of O(***(n)) where n is the number of pixels, and due to the fact that thermal images contains smaller number of regions of colors. With the detected regions, some additional measures are used to filter out the artifacts to correctly detect the object in the images. The numerical results have proved the high quality of the proposed solutions.

关键词： graph-based segmentation image segmentation object detection thermal camera

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Extremum seeking control for an anaerobic digestion process

Extremum seeking control for an anaerobic digestion process

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Sergiu Caraman George Ifrim Emil Ceangă Marian Barbu Mariana Titica Radu-Emil Precup Department of Automatic Control and Electrical Engineering “Dunarea de Jos” University of Galati Galati Romania Universite de Nantes CNRS GEPEA UMR-CNR 6144 Bd. de l'Universite France Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania

The paper deals with the optimal control (extremum seeking algorithm) of an anaerobic digestion process. It uses a simplified version of the anaerobic digester model. Three cases of optimization criteria are considered taking into account the quality variable of the process: 1. the methane quantity in gaseous form, 2. the level of pollutants (it is expressed as the difference between the influent substrate and the substrate quantities accumulated in the digester) and 3. an aggregated quality variable resulted from the combination of the first two criteria. The analysis of anaerobic digestion process static characteristics shows that each characteristic reaches a point of maximum. The extremum seeking algorithm aims to keep the operating point in this point of maximum. The simulation results confirm the good behaviour of the extremum seeking algorithm.

关键词： Mathematical model Process control Biological system modeling Microorganisms Carbon dioxide Optimization Substrates

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RETRACTED: Dual-mode predictive flexible rotor control for active magnetic bearings with input constraints

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Journal of Vibration and control 2016年第20期23卷 NP2页

作者： Yue Wu Jie Zhao Hai-Tao Zhang Ming-Can Fan Xi Yu Guangdong HUST Industrial Technology Research Institute Guangdong Province Key Lab of Digital Manufacturing Equipment ChinaKey Laboratory of Image Processing and Intelligent Control School of Automation State Key Laboratory of Digital Manufacturing Equipments and Technology Huazhong University of Science and Technology China Key Laboratory of Image Processing and Intelligent Control School of Automation State Key Laboratory of Digital Manufacturing Equipments and Technology Huazhong University of Science and Technology China Department of Mathematics Huizhou University China School of Electrical and Information Engineering Xi'an Technology University China

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Repowering of a synchronous generation plant by induction generator

Repowering of a synchronous generation plant by induction ge...

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CHILEAN Conference on electrical, Electronics engineering, Information and Communication Technologies (CHILECON)

作者： Alana S. Magalhaes C. A. Leovir Calebe A. Matias Alan H. F. Silva Elder G. Domingues Aylton. J. Alves Wesley P. Calixto Program in Electronic Systems and Automation University of Brasilia (UnB) Brasília Brazil Experimental and Technological Research and Study Group (NExT) Federal Institute of Goias (IFG) Goiânia Brazil School of Electrical Mechanical and Computer Engineering Federal University of Gouias (UFG) Goiânia Brazil

ISBN: (纸本)9781467387576

This work proposes itself through mathematical modeling, simulating the electrical interactions between two electrical generators, an induction generator and a synchronous generator connected to a common bus in steady state, subject to non-linear load. By comparing the modeling of the two machines, we can see that the induction generator will present best way for the harmonic currents flowing in common bus. Experimental tests have confirmed the results of comparative modeling of the electric generators. It was evident that the induction generator, in addition to increasing the active power to the electrical system, could reduce current harmonics components present at the connection point improving the voltage profile in the network.

关键词： Induction generators Harmonic analysis Synchronous generators Power system harmonics Reactive power

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From linear to nonlinear model predictive control of a building 19

From linear to nonlinear model predictive control of a build...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Pčolka, Matej Žáčeková, Eva Robinett, Rush Čelikovský, Sergej Šebek, Michael Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Mechanical Engineering-Engineering Mechanics Michigan Technological University United States Institute of Information Theory and Automation Academy of Sciences of the Czech Republic Czech Republic

ISBN: (纸本)9783902823625

In the building climate control area, the linear model predictive control (LMPC)- nowadays considered a mature technique-benefits from the fact that the resulting optimization task is convex (thus easily and quickly solvable). On the other hand, while nonlinear model predictive control (NMPC) using a more detailed nonlinear model of a building takes advantage of its more accurate predictions and the fact that it attacks the optimization task more directly, it requires more involved ways of solving the non-convex optimization problem. In this paper, the gap between LMPC and NMPC is bridged by introducing several variants of linear time-varying model predictive controller (LTVMPC). Making use of linear time-varying model of the controlled building, LTVMPC obtains predictions which are closer to reality than those of linear time invariant model while still keeping the optimization task convex and less computationally demanding than in the case of NMPC. The concept of LTVMPC is verified on a set of numerical experiments performed using a high fidelity model created in a building simulation environment and compared to the previously mentioned alternatives (LMPC and NMPC) looking at both the control performance and the computational requirements. © IFAC.

关键词： Model predictive control

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Attitude synchronization for multiple flexible spacecraft based on non-smooth control 19

Attitude synchronization for multiple flexible spacecraft ba...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Du, Haibo He, Yigang Li, Shihua Cheng, Yingying Chen, Xisong School of Electrical Engineering and Automation Hefei University of Technology Hefei230009 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing210096 China

ISBN: (纸本)9783902823625

This paper considers the problem of attitude synchronization for a group of flexible spacecraft based on distributed attitude cooperative control strategy. Based on the backstepping design, non-smooth control, and the neighbor-based design rule, a distributed attitude control law is constructed step by step. Under the proposed control law, it is shown that the attitude synchronization is achieved asymptotically and the induced vibration by flexible appendages is simultaneously suppressed. © IFAC.

关键词： control theory

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Recurrence characteristics analysis of near-Surface wind speed signal with different sampling frequencies

Recurrence characteristics analysis of near-Surface wind spe...

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4th International Conference on Frontiers of Manufacturing Science and Measuring Technology, ICFMM 2014

作者： Zeng, Ming Wu, Zhan Xie Meng, Qing Hao Li, Jing Hai Ma, Shu Gen Tianjin Key Laboratory of Process Measurement and Control Institute of Robotics and Autonomous Systems School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

ISBN: (纸本)9783038351924

The wind is the main factor to influence the propagation of gas in the atmosphere. Therefore, the wind signal obtained by anemometer will provide us valuable clues for searching gas leakage sources. In this paper, the Recurrence Plot (RP) and Recurrence Quantification Analysis (RQA) are applied to analyze the influence of recurrence characteristics of the wind speed time series under the condition of the same place, the same time period and with the sampling frequency of 1hz, 2hz, 4.2hz, 5hz, 8.3hz, 12.5hz and 16.7hz respectively. Research results show that when the sampling frequency is higher than 5hz, the trends of recurrence nature of different groups are basically unchanged. However, when the sampling frequency is set below 5hz, the original trend of recurrence nature is destroyed, because the recurrence characteristic curves obtained using different sampling frequencies appear cross or overlapping phenomena. The above results indicate that the anemometer will not be able to fully capture the detailed information in wind field when its sampling frequency is lower than 5hz. The recurrence characteristics analysis of the wind speed signals provides an important basis for the optimal selection of anemometer. © (2014) Trans Tech Publications, Switzerland.

关键词： Time series

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