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IEEE Conference on Decision and control

作者： J.A. Rossiter Liuping Wang Department of Automatic Systems and Control Engineering University of Sheffield UK School of Electrical and Computer Engineering RMIT University Australia

ISBN: (纸本)9781424431236

This paper develops a novel mechanism for managing the performance and feasibility trade off within predictive control. Specifically, it demonstrates that the potential of Laguerre functions needs more investigation by the community as this offers a simple and effective alternative to the more usual parameterisations using pulse operator in the predictions. The paper develops a simple and efficient dual-mode algorithm using Laguerre functions and demonstrates, by example, the improvements with respect to a conventional approach, in terms of performance and feasibility benefits.

关键词： Open loop systems Predictive control control systems Infinite horizon Algebra computer industry electrical equipment industry Industrial control control engineering Trajectory

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Disturbance rejection and set-point tracking of sinusoidal signals using Generalized Predictive control

Disturbance rejection and set-point tracking of sinusoidal s...

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IEEE Conference on Decision and control

作者： Liuping Wang J.A. Rossiter School of Electrical and Computer Engineering RMIT University Australia Department of Automatic Systems and Control Engineering University of Sheffield UK

ISBN: (纸本)9781424431236

This paper seeks to extend Generalized Predictive control (GPC) to tracking of trajectories in a periodic nature. The initial focus is on sinusoidal trajectories, but the work may be extended later on to a signal with bandlimited frequencies. In addition, this paper proposes strategies for optimizing the prefilter in GPC to improve the transient performance in setpoint tracking.

关键词： Predictive control Predictive models Steady-state Trajectory computer errors Error correction Cutting tools Frequency domain analysis Robustness Signal generators

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On the existence and uniqueness of solutions for the concept values in Fuzzy Cognitive Maps

On the existence and uniqueness of solutions for the concept...

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IEEE Conference on Decision and control

作者： Yiannis Boutalis Theodoros Kottas Manolis Christodoulou Department of Electrical and Computer Engineering Democritus University of Thrace Xanthi Greece Department of Electrical Electronic and Communication Engineering Chair of Automatic Control University of Erlangen Nuremberg Germany Department of Electrical and Computer Engineering Democritus University of Thrace Thrace Greece Electronic and Computer Engineering Technical University of Crete Crete Greece

ISBN: (纸本)9781424431236

Fuzzy cognitive maps (FCM) have been introduced by Kosko to model complex behavioral systems in various scientific areas. One issue that has not been adequately studied so far is the conditions under which they reach a certain equilibrium point after an initial perturbation. This is equivalent to studying the existence and uniqueness of solutions for their concept values. In this paper, we study the existence of solutions by using an appropriately defined contraction mapping theorem. It is proved that when the weight interconnections fulfill certain conditions the concept values will converge to a unique solution regardless the exact values of the initial concept values perturbations. Otherwise the existence or the uniqueness of equilibrium can not be assured. The results are considered very significant because set the basis for the development of reliable system identification and control schemes based on the concept of FCM. In view of these results recently proposed extensions of FCM, the fuzzy cognitive networks are invoked.

关键词： Fuzzy cognitive maps System identification control systems Fuzzy control Fuzzy systems Humans Power system modeling Decision making Power engineering and energy Automatic control

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New delay-range-dependent stability condition for linear system

New delay-range-dependent stability condition for linear sys...

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World Congress on Intelligent control and Automation (WCICA)

作者： Shaoshuai Mou Huijun Gao Tongwen Chen Department of Control Science and Engineering Harbin Institute of Technology Harbin China Department of Electrical and Computer Engineering University of Alberta AB Canada

This paper proposes an improved delay-range-dependent stability condition for linear systems with an interval time-varying delay, which satisfies h 1 lesd(t)lesh 2 . The improvement is achieved by representing d(t) as h 1 +h(t) with 0lesh(t)lesh 2 -h 1 , and then constructing a novel Lyapunov-Krasovskii functional with the idea of partitioning the constant time delay. It is illustrated via a numerical example that the proposed result is much less conservative than those available in the literature.

关键词： Delay Stability analysis Stability criteria Time varying systems Delay effects Asymptotic stability Symmetric matrices

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A Coordinated Design Framework For Power System Automation

A Coordinated Design Framework For Power System Automation

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12th International Middle East Power Systems Conference, vol.1

作者： Shady A. El-Kashlan Electrical & Computer Control Engineering Department Arab Academy for Science Technology and Maritime Transport Alexandria Egypt

This paper presents a coordinated design of power automation platform for integrating the various power automation sub-systems. It closely follows the IEC standards (IEC61970, IEC61968, IEC61850) and meets the high demands on operation performance, reliability, expandability, openness and security of modern power system control and management. The design introduces two new concepts: Operation Oriented Architecture (OOA) and Multiple Redundancy, or 1×M redundancy. It also includes a high speed open database connection to various RDBMS databases and an open interface layer to different computer operating systems. Other advanced features are also provided in the new design, including the distributed real time database, the data subscribing mechanism, GUI-based data model editing tools and the full version management mechanisms.

关键词： Power System Automation Multi-Agent Distributed Database Multiple Redundancy (1×M) Operating System Independent

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Towards Model-based Continuous-time Identification of the Human Balance controller

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IFAC Proceedings Volumes 2008年第2期41卷 11612-11617页

作者： Peter J Gawthrop Liuping Wang Centre for Systems and Control and Department of Mechanical Engineering University of Glasgow GLASGOW. G12 8QQ Scotland Discipline of Electrical Energy and Control Systems School of Electrical and Computer Engineering RMIT University Melbourne Victoria 3000 Australia

There are a number of competing scientific hypotheses about the structure and parameters of the human control system concerned with balance. System identification techniques have potential to distinguish between such competing hypotheses. As a step towards this goal, the data from an initial series of experiments involving balancing an inverted pendulum by a human via a joystick was analysed using a recently-developed two-stage continuous-time identification method.

关键词： Identification an validation Model formulation, experiment design Kinetic modelling and control of biological systems

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Hybrid error concealment in image communication using data hiding and spatial redundancy

Hybrid error concealment in image communication using data h...

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International Conference on Telecommunications (ICT)

作者： Alireza Kenarsari Anhari Shabnam Sodagari Alireza Nasiri Avanaki Department of Electrical and Computer Engineering University of British Columbia Vancouver BC Canada Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

Designed to diminish the artifacts caused by application of the state-of-the-art error concealment methods, a hybrid error concealment scheme is introduced. The proposed scheme stands out by using the inherent spatial redundancy of natural images along with a data hiding technique to obtain the information required for reconstruction of the lost parts of the image at the receiver. Furthermore, to maintain the quality of the received image in high packet loss conditions, an alternative scheme is proposed which will be activated in response to a receiverpsilas feedback reporting a high packet loss ratio. Our simulation results show that the proposed scheme outperforms the existing methods in terms of the quality of the received image and computational cost.

关键词： Transform coding Watermarking Image coding Decoding Approximation methods Interpolation Estimation

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Disturbance Rejection and Set-point Following of Periodic Signals Using Predictive control with Constraints

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IFAC Proceedings Volumes 2008年第2期41卷 10892-10897页

作者： Liuping Wang Peter J Gawthrop Discipline of Electrical Energy and Control Systems School of Electrical and Computer Engineering RMIT University Melbourne Victoria 3000 Australia Centre for Systems and Control and Department of Mechanical Engineering University of Glasgow GLASGOW. G12 8QQ Scotland

This paper proposes a continuous-time model predictive control design for disturbance rejection and set-point following of periodic signals. By assuming input disturbance in the form of sinusoid, the periodic frequency is embedded into the design model. Hence, from internal model principle, the steady-state error of the model predictive control system is ensured to be zero for both disturbance rejection and set-point following. Furthermore, with the design framework of model predictive control, hard constraints on the derivative and amplitude of the control signals are imposed as part of the performance specification. Simulation studies have been used to show the efficacy of the design with or without hard constraints.

关键词： Periodic set-point signal periodic disturbance predictive control constrained control optimization

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Nonlinear sliding surfaces;Computing and existence of solution

Nonlinear sliding surfaces;Computing and existence of soluti...

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International Conference on control, Automation and Systems ( ICCAS)

作者： Azad Ghaffari Mohammad Javad Yazdanpanah Department of Instrumentation and Control Monenco Iran Tehran Iran Department of Electrical and Computer Engineering University of Tehran Tehran Iran

In this paper, we have concentrated on real systems consisting of structural uncertainties and affected by external disturbances. In this regard, Sliding Mode control (S.M.C.) is utilized. To decrease energy consumption, arising from chattering phenomenon, a smooth switch has been used in design procedure. Consequently, sliding equation will play a dominant controlling role in its neighborhood. The converging property of sliding motion towards the origin is a challenging issue. In this article we present a new method to prove the stability of the sliding phase which means, state trajectories on the sliding surface move toward the origin. At the beginning, the equivalent control method is reestablished such that makes this purpose accessible. The modification bounds the sliding equation to a converging set. Then to improve main factors of closed loop system, such as, transient behavior, energy consumption and the domain of attraction, the optimal control theory is used to compute the optimized sliding surface in the stabilizing set. Generally, desired surface has nonlinear terms. Finally, we propose an elaborate algorithm for computing optimized nonlinear surfaces. The designed controller is applied to a flexible-link setup. Simulation results show the efficiency of the proposed approach.

关键词： Sliding mode control Switches Equations control systems Optimal control Energy consumption Automatic control Nonlinear control systems Uncertainty Stability

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A Novel Dual Power Flow Wind Power Generation System

A Novel Dual Power Flow Wind Power Generation System

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11th International Conference on electrical Machines and Systems(第11届国际电机与系统会议)

作者： Ming Cheng Xikai Sun Longya Xu Wei Hua Engineering Research Center for Motion Control of MOE School of Electrical EngineeringSoutheast Un Department of Electrical & Computer Engineering The Ohio State University Columbus 43210 USA Engineering Research Center for Motion Control of MOE School of Electrical Engineering Southeast U

A novel dual power flow wind power generation system based on electrical variable transmission (EVT) is proposed which combines the advantages of direct-driven and non-direct-driven systems. In this paper, the principles of the dual power flow wind power generation system are presented. The dynamic model and operation modes of the double layer permanent magnet outer rotor based EVT are introduced. Furthermore, the operation processes and control strategies of the novel system are simulated and analyzed. An EVT prototype machine is designed and verified by finite element analysis (FEA).

关键词： Load flow Wind power generation Magnetic analysis Power system modeling Permanent magnets Rotors Process control Analytical models Prototypes Finite element methods

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