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Design of multiple anti-windup loops for multiple activations

Science China(Information Sciences) 2012年第9期55卷 1925-1934页

作者： WU XiongJun 1,2 & LIN Zongli 3,1 1 Department of automation,Shanghai Jiao Tong University,and Key Laboratory of system control and Information Processing,Ministry of Education of China,Shanghai 200240,China 2 No.802 Institute of Shanghai Academy of Space Flight Technology,the Eighth Academy of China Aerospace Science and Technology Corporation,Shanghai 200090,China 3 Charles L.Brown Department of electrical and Computer engineering,University of Virginia,P.O.Box 400743,Charlottesville,VA 22904-4743,USA 1. Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 China2. No. 802 Institute of Shanghai Academy of Space Flight Technology the Eighth Academy of China Aerospace Science and Technology Corporation Shanghai 200090 China3. Charles L. Brown Department of Electrical and Computer Engineering University of Virginia P.O. Box 400743 Charlottesville VA 22904-4743 USA

This paper considers anti-windup design for linear systems subject to actuator *** anti-windup gains are designed for activations immediately at the occurrence actuator saturation,after the saturation has reached a certain level and in anticipation of the occurrence of saturation,*** design is based on the minimization of L 2 gain from the disturbance to the controlled output of the resulting closed-loop *** anti-windup scheme involves a single anti-windup loop for immediate activation.A recent innovation is to design a single anti-windup loop for delayed or anticipatory activation,as well as to design two anti-windup gains,one for immediate activation and one for delayed *** design of three anti-windup gains for three different activations is shown through simulation to lead to significant further performance improvement over the previous activation schemes.

关键词： actuator saturation anti-windup anticipatory activation delayed activation L 2 gain nonlinear control

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BLOCK-BASED DECISION-FEEDBACK EQUALIZERS WITH REDUCED REDUNDANCY

BLOCK-BASED DECISION-FEEDBACK EQUALIZERS WITH REDUCED REDUND...

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European Signal Processing Conference

作者： Wallace A. Martins Paulo S. R. Diniz Federal Center for Technological Education Dept. of Control and Automation Industrial Eng. Federal University of Rio de Janeiro Depart. of Electronics and Computer Eng. Electrical Engineering Program

ISBN: (纸本)9781467310680

In recent years many works related to the design of block-based transceivers have been published. The main target of this research activity is to optimize the use of the spectral resources in broadband transmissions. A possible way to address this problem is to reduce the amount of redundancy required by block transmissions to avoid interblock interference. An efficient solution is to employ zero-padding zero-jamming (ZP-ZJ) transceivers, which allow the transmission with reduced redundancy. ZP-ZJ systems have been successfully employed in the context of linear transceivers. This paper shows how the ZP-ZJ concept can be applied in decisionfeedback equalization. Some performance analyses based on the resulting mean-square error and error probability of symbols are included to show the possible degrading effects of the reduction in the amount of redundancy. Nevertheless, simulation results illustrate that data throughput and average mutual information between transmitted and estimated symbols can be enhanced significantly without affecting the system performance, for a certain level of signal-tonoise ratio at the receiver.

关键词： Block DFE Reduced redundancy Throughput redundancy Transceivers Research Activities system performance Signs and symbols feedback equalizer data throughput Error probability Transmissions broadband

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Biophotogrammetry model of respiratory motion analysis applied to children

Biophotogrammetry model of respiratory motion analysis appli...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： W. L. Ripka D. da V. Ricieri L. Ulbricht E. B. Neves A. M. W Stadnik E. F. R. Romaneli Electrical Engineering and Industrial Computing Program Federal University of Technology Paraná Brazil Physical Education Department Federal University of Paraná Brazil Master Program in Biomedical Engineering Physical Education Federal University of Technology Paraná Brazil Control and Automation Engineering Federal University of Technology Paraná Brazil

This study aimed to test a protocol of measurements based on Biophotogrammetry to Analysis of Respiratory Mechanics (BARM) in healthy children. Seventeen normal spirometric children (six male and 11 female) were tested. Their performed maneuvers of forced inspiratory vital capacity were recorded in the supine position. The images were acquired by a digital camera, laterally placed to the trunk. Surface markers allowed that the files, exported to CorelDraw® software, were processed by irregular trapezoids paths. Compartments were defined in the thoracic (TX), abdominal (AB) and the chest wall (CW). They were defined at the end of an inspiration and expiration, both maximum, controlled by a digital spirometer. The result showed that the measured areas at the inspiratory and expiratory periods were statistically different (p

关键词： Muscles Educational institutions Lungs Member and Geographic Activities Board committees Biological system modeling Pediatrics Surface treatment

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Heterogeneity of organizing chance promotes cooperation in spatial public goods games

Heterogeneity of organizing chance promotes cooperation in s...

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第八届中国多智能体系统与控制会议(MASC'2012)

作者： Yongkui Liu Lin Zhang Xiaojie Chen Long Wang School of Automation Science and Electrical Engineering Beihang University - Beijing 100191China Sc School of Automation Science and Electrical Engineering Beihang University - Beijing 100191China Evolution and Ecology Program International Institute for Applied Systems Analysis(IIASA)- Schlosspl Center for Systems and Control State Key Laboratory for Turbulence and Complex SystemsCollege of En

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Stochastic stability of genetic regulatory networks with multiple time-varying delays

Stochastic stability of genetic regulatory networks with mul...

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International Conference on Advanced Mechatronic systems (ICAMechS)

作者： Yan Wang Hong Wang Linkun Wang School of Automation Science and Electrical Engineering Beihang University Beijing P. R. China Control System Center The University of Manchester Manchester UK Instrumentation Technology & Economy Institute Beijing P. R. China

This paper investigates the stochastic stability problem of genetic regulatory networks (GRNs) with multiple time-varying delays. Most of the results on the stability of GRNs with delays are based on a model in which the delays of the transcription and translation processes for each gene product take the same value. In this paper, we generalized the model to a differential equation with multiple time-varying delays. Sufficient conditions for the stochastic stability of the GRNs with stochastic noise are obtained. Finally, a simulation example is given to show the effectiveness of the proposed results.

关键词： Biological system modeling Delay Equations Mathematical model

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Distributed Finite-time Cooperative Tracking of Networked Lagrange systems via Local Interactions

Distributed Finite-time Cooperative Tracking of Networked La...

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American control Conference

作者： Ziyang Meng Zongli Lin Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia Charlottesville VA 22904-4743 USA

ISBN: (纸本)9781457710957

This paper studies the finite-time cooperative tracking problem for networked Lagrange systems with a time-varying leader's generalized coordinate derivative. First, a finite-time state feedback control protocol is proposed for each follower by using only local information, under which the states of the followers are shown to converge to those of the leader in finite time. The results of the static feedback design are then extended to those of the dynamic feedback design. The finite-time cooperative tracking problem of networked Lagrange systems over a directed switching communication topology is proposed. With the help of a so-called finite-time consensus-based observer, we show that cooperative tracking of networked Lagrange systems can be achieved in finite time if the leader has directed information paths to each follower at each time instant and the control parameters satisfy certain conditions.

关键词： Lagrange Mentoring tracking problem local information. control parameter

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On Global Consensus of Linear Multi-agent systems Subject to Input Saturation

On Global Consensus of Linear Multi-agent Systems Subject to...

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American control Conference

作者： Ziyang Meng Zhiyun Zhao Zongli Lin Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia Charlottesville VA 22904-4743 USA

ISBN: (纸本)9781457710957

This paper studies the leader-following consensus problem for a group of agents with identical linear systems subject to control input saturation. We focus on two classes of linear systems, neutrally stable systems and double integrator systems. For neurally stable systems, we establish that global consensus can be achieved by linear local feedback laws over an undirected fixed or a switching communication topology. For double integrator systems, we establish that global consensus can be achieved by linear local feedback laws over a fixed communication topology and, with the help of a simple saturation function in the local feedback laws, global consensus can also be achieved over a switching undirected topology. Simulation results illustrate the theoretical results.

关键词： Lead Topology Switches Multiagent systems Linear systems Trajectory

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Adaptive generalized predictive decoupling control for a class of MIMO nonlinear systems based on unmodeled dynamic compensation

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Kongzhi Lilun Yu Yingyong/control Theory and Applications 2012年第2期29卷 157-166页

作者： Zhang, Ya-Jun Chai, Tian-You Wang, Hong Niu, Hong The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang Liaoning 110004 China Research Center of Automation Northeastern University Shenyang Liaoning 110004 China The Control Systems Centre School of Electrical and Electronic Engineering University of Manchester M60 1QD United Kingdom Institute of System Science Northeastern University Shenyang Liaoning 110004 China

For a class of uncertain multi-input-multi-output (MIMO) discrete-time nonlinear systems with strong coupling and unstable zero-dynamics, an adaptive generalized predictive decoupling switching control method based on unmodeled dynamic compensation is proposed. It is only required that the higher order nonlinear terms of the system to satisfy a linear growth condition, rather than the global boundedness condition widely used. The analysis of stability and convergence of the adaptive control method are performed. Moreover, in designing the nonlinear generalized predictive decoupling controller, we combine the adaptive-network-based fuzzy inference system (ANFIS) training with the "one-toone mapping" technique to adaptively estimate the unmodeled dynamics, so that the universal approximation property of ANFIS can be guaranteed. Finally, simulation results demonstrate the superiority of the proposed method and validate the theoretical analysis.

关键词： Nonlinear systems

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Forward modeling of infinitesimal dipole dipping effects in marine CSEM survey

Forward modeling of infinitesimal dipole dipping effects in ...

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2011 International Conference on electrical engineering and Informatics, ICEEI 2011

作者： Hussain, Nazabat Karsiti, M.N. Yahya, Norashikin Burhanuddin, Zainal A. Automation and Control System Group Department of Electrical and Electronic Engineering Universiti Teknologi PETRONAS Bandar Seri Iskandar 31750 Tronoh Perak Malaysia

ISBN: (纸本)9781457707520

This paper present numerical modeling of infinitesimal dipole for the purpose of finding irregularities in real time survey data of marine controlled source electromagnetic survey. Algorithm for numerical solution using staggered grid scheme of finite difference method has been developed by using auxiliary potential functions in Helmholtz equation. Solution is obtained through a) discretized the solution region into number of elements and define boundary condition b) implementing algorithm for resulting system of linear algebraic equations. The results provides detailed understanding of irregularities in survey data caused by improper orientation of source during electromagnetic sounding for exploration of petroleum reserves in deep sea. © 2011 IEEE.

关键词： Numerical models

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Mapping of hydrocarbon with marine em method using 2-D forward modeling

Mapping of hydrocarbon with marine em method using 2-D forwa...

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International Conference on Modeling, Simulation and Applied Optimization

ISBN: (纸本)9781457700057

This paper present two-dimensional forward modeling of marine controlled-source electromagnetic data for the purpose of hydrocarbon mapping. The forward algorithm employs a staggered-grid finite difference solution to the total-electric field Helmholtz equation. Solution are achieved through a) an optimal grid technique that extends the boundaries of the mesh outward from the region of interest using a minimal number of nodes, and b) a direct matrix solution technique that allows for the simultaneous solution for all sources. The forward modeling provides qualitative understanding of electromagnetic signals behavior as it propagates through hydrocarbon and conductive saline fluids bearing layers at depth. © 2011 IEEE.

关键词： Hydrocarbons

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