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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Xing-Gang Yan Sarah K.Spurgeon Christopher Edwards Instrumentation Control and Embedded Systems Research GroupSchool of Engineering and Digital ArtsUniversity of Kent Control and Instrumentation Research Group Department of EngineeringUniversity of Leicester

In this paper,global decentralised stabilisation of a class of interconnected delay systems is considered,where both known and uncertain interconnections involve time *** and mismatched interconnections are considered separately to reduce the conservatism.A composite sliding surface is designed and the stability of the associated sliding motion which is governed by a time delay interconnected system,is analysed based on the Razumikhin Lyapunov approach.A decentralised static output feedback variable structure control which is dependent on time-delay is synthesized to drive the interconnected system to the sliding surface *** results show the effectiveness of the proposed approach.

关键词： Lyapunov Global time-delay dependent decentralised sliding mode control using only output information

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An efficient translation-rotation template matching using pre-computed scores of rotated templates

An efficient translation-rotation template matching using pr...

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Sunyawit Sassanapitak Pakorn Kaewtrakulpong Department of Control Systems and Instrumentation Engineering Faculty of Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand

Printed Circuit Board Assembly (PCBA) quality inspection is an essential stage in PCBA manufacturing. In this paper, we focus on development of efficient template matching algorithms used in Automated Optical Inspection (AOI) for PCBA quality inspection in post-reflow process. In our work, a pre-computed set of Normalized Cross Correlation (NCC) scores from rotated templates to the original template are used to eliminate unnecessary calculation and to estimate rotation angles of scene object images. Two models called multiple band and piecewise linear are implemented and compared to find suitable rotation angles of candidate locations. Since the technique follows traditional systematic window sliding, existing efficient implementation techniques of template matching can be directly applied. Unlike other rotation invariant methods, accurate rotation angles can be directly obtained from the technique. Experimental results show excellent performance for PCBA quality inspection applications.

关键词： Global Positioning System Data analysis Filtering Base stations Measurement errors Filters Vehicles Roads Velocity measurement Space exploration

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Robust anti-windup against LTI uncertainty using frequency dependent IQCs

Robust anti-windup against LTI uncertainty using frequency d...

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ICCAS-SICE 2009 - ICROS-SICE International Joint Conference 2009

作者： Morales, R.M. Heath, W.P. Li, G. Control and Instrumentation Research Group Department of Engineering University of Leicester University Road Leicester LE1 7RH United Kingdom Control Systems Research Group University of Manchester Sackville St. Manchester M60 1QD United Kingdom Automatic Control Laboratory Department of Mechanical Engineering University of Bristol University Walk Bristol BS8 1TR United Kingdom

ISBN: (纸本)9784907764296

This paper will present a study on the robustness of anti-windup systems where the plant uncertainty can be expressed by LTI norm-bounded operators. The treatment is constructed under the IQC framework of Megretski and Rantzer. Robustness of anti-windup systems against LTI uncertainty using frequency dependent IQCs are less conservative than those where plant uncertainty is addressed by static IQCs. They can however increase significantly the computational burden in the algorithms. The paper shows that sufficient conditions for robustness of anti-windup systems against LTI uncertainty can be, in some circumstances, greatly simplified. They can also be expressed in the frequency domain and interpreted graphically. The test is finally exploited for anti-windup tuning. © 2009 SICE.

关键词： Frequency domain analysis

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Robust anti-windup against LTI uncertainty using frequency dependent IQCs

Robust anti-windup against LTI uncertainty using frequency d...

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SICE Annual Conference

作者： R. M. Morales W. P. Heath G. Li Control and Instrumentation Research Group Department of Engineering University of Leicester Leicester UK Control Systems Research Group University of Manchester Institute of Science and Technology Manchester UK Automatic Control Laboratory Department of Mechanical Engineering University of Bristol Bristol UK

关键词： Robustness Uncertainty Frequency dependence Robust control Automatic control control systems Heat engines Temperature control Sufficient conditions Actuators

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Validation of a model of regulation in the tryptophan operon against multiple experiment data using global optimisation

Validation of a model of regulation in the tryptophan operon...

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SICE Annual Conference

作者： Jongrae Kim Jung-Su Kim Ian Postlethwaite Pat Heslop-Harrison Declan G. Bates Department of AeroSpace Engineering University of Glasgow Glasgow UK Department of Control & Instrumentation Engineering Seoul National University of Technology Seoul South Korea Systems Biology Laboratory Departments of Engineering and Biology University of Leicester UK

This paper is concerned with validating a mathematical model of regulation in the tryptophan operon using global optimization. Although a number of models for this biochemical network are proposed, in many cases only qualitative agreement between the model output and experimental data was demonstrated, since very little information is currently available to guide the selection of parameter values for the models. This paper presents a model validating method using both multiple experimental data and global optimization.

关键词： Amino acids Biological system modeling Mathematical model systems biology Optimization methods Feedback loop Biochemistry control system synthesis Attenuation Equations

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Linear Matrix Inequality Based Dynamic Output Feedback Sliding Mode control for Uncertain Plants

Linear Matrix Inequality Based Dynamic Output Feedback Slidi...

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2009 American control Conference (ACC 2009)

作者： Jose Manuel ANDRADE-DA SILVA Christopher EDWARDS Sarah K. SPURGEON Control and Instrumentation Research Group Department of Engineering University of Leicester Leicester LE1 7RH U.K. Instrumentation Control and Embedded Systems Research Group Department of Electronics University of Kent Canterbury CT2 7NT U.K.

ISBN: (纸本)9781424445233

The development of a synthesis methodology to design compensator-based sliding mode output feedback controllers using linear matrix inequalities is considered in this paper. The class of dynamical system dealt with belongs to the class of uncertain plants with matched, and mismatched uncertainties in polytopic form. The efficacy of the proposed design methodology is demonstrated by a numerical design and computer simulations.

关键词： Linear matrix inequalities Output feedback Sliding mode control Uncertainty Design methodology Iterative algorithms Linear feedback control systems control system synthesis Robust control Nonlinear dynamical systems

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Design of optimal fuzzy logic-PID controller using bee colony optimization for frequency control in an isolated wind-diesel system

Design of optimal fuzzy logic-PID controller using bee colon...

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IEEE/PES Transmission and Distribution Conference and Exhibition: Asia and Pacific

作者： T. Chaiyatham I. Ngamroo S. Pothiya S. Vachirasricirikul Department of Electrical Engineering King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Center of Excellence for Innovative Energy Systems King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand School of Communication Instrumentation & Control Sirindhorn International Institute of Technology Thammasat University Thailand

ISBN: (纸本)9781424452293

Generally, the inevitable problems in the fuzzy logic-PID (FLPID) control design are the trial and error of the setting of scale factors, membership functions and control rules. To solve these problems, this paper proposes the optimal FLPID controller design using bee colony optimization (BCO) for the load frequency control in the microgrid system. The considered microgrid is the hybrid wind-diesel isolated system. The BCO is applied to automatically optimize the FLPID controllers of governor in the diesel side and blade pitch control in the wind side. Simulation studies show the superior robustness of the optimal FLPID against system parameters variation in comparison with the optimal PID controller and the non-optimal FLPID controller.

关键词： Fuzzy control Fuzzy logic Fuzzy systems Optimal control control systems Design optimization Frequency control Automatic control Fuzzy sets control design

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Robust static output feedback sliding mode control design via an artificial stabilizing delay

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IFAC Proceedings Volumes 2008年第2期41卷 8654-8659页

作者： Alexandre Seuret Christopher Edwards Sarah K. Spurgeon Emilia Fridman Control and Instrumentation Research Group Department of Engineering University of Leicester University Road Leicester LE1 7RH UK. as389 ce14 Department of Electrical Engineering-Systems Tel-Aviv University Tel-Aviv 69978 Israel

It is well known that for uncertain linear systems, a static output feedback sliding mode controller can only be determined if a particular triple associated with the reduced order dynamics in the sliding mode is stabilizable. This paper shows that the static output feedback sliding mode control design problem can be solved for a broader class of systems if a known delay term is deliberately introduced into the switching function. Effectively the reduced order sliding mode dynamics are stabilized by the introduction of this artificial delay.

关键词： Sliding mode control output feedback exponential stability discretized Lyapunov-Krasovskii functionals stabilizing delay Robustness

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Navigation of an omni-directional mobile robot with active caster wheels

Navigation of an omni-directional mobile robot with active c...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Eui-jung Jung Ho Yul Lee Jae Hoon Lee Byung-Ju Yi Whee Kuk Kim Shin'ichi Yuta School of Electrical Engineering and Computer Science Hanyang University South Korea Intelligent Systems Research Institute Ubiquitous Functions Research Group AIST Japan Department of Control and Instrumentation Engineering Korea University South Korea Institute of Engineering Mechanics and Systems University of Tsukuba Japan

This work deals with navigation of an omni-directional mobile robot with active caster wheels. Initially, the posture of the omni-directional mobile robot is calculated by using the odometry information. Next, the position accuracy of the mobile robot is measured through comparison of the odometry information and the external sensor measurement. Finally, for successful navigation of the mobile robot, a motion planning algorithm that employs kinematic redundancy resolution method is proposed. Through experiments for multiple obstacles and multiple moving obstacles, the feasibility of the proposed navigation algorithm was verified.

关键词： Navigation Mobile robots Wheels Kinematics Computer science Position measurement Roads Robotics and automation USA Councils Motion planning

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Minimisation of harmonics amplification due to resonance by relocation of capacitors using ADALINE on a DSP

Minimisation of harmonics amplification due to resonance by ...

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International Conference on Computing, Communication and Networking, ICCCN

作者： K.R. Valluvan A. Vetrivel A.M. Natarajan Jovitha Jerome Department of Information Technology Kongu Engineering College Erode India Department of Electrical and Electronics Engineering Institute of Road and Transport Technology Erode India Dept. of Electronics & Communication Engineering Bannari Amman Institute of Technology Sathyamangalam India Department of Instrumentation and Control Systems Engineering PSG College of Technology Coimbatore India

Nonlinear loads produce current harmonics. The harmonic current flowing through the nonzero impedance of the electrical network, produce harmonics in supply voltage. Harmonics in power systems cause many ill effects and economic losses. To minimise the losses, IEEE: 519- 1992 has specified limits on voltage and current harmonics. Inductive loads like induction motors produce lagging power factor of less than unity. Capacitors are often used to improve the power factor by adding them in shunt with inductive loads. When high frequency harmonic currents flow through the network, due to the combination of inductive and capacitive loads (which are linear), resonance occurs. This causes an amplification of harmonics. Consequently, the increased harmonics affect the linear loads and produce more losses. This paper explains the results of harmonics measurements by a class of neural network, ADALINE implemented on a digital signal processor. Measurements were carried out when capacitors were grouped in one place and after their relocation nearer to the linear loads. The results show that, relocation of capacitors have minimised both voltage and current harmonics significantly. This methodology is very economical since it does not require any additional equipment for filtering of harmonics.

关键词： Resonance Capacitors Digital signal processing Power system harmonics Power harmonic filters Voltage Power generation economics Reactive power Impedance Power system economics

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