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QFT control based on zero phase error compensation for flight simulator

Journal of Systems engineering and Electronics 2007年第1期18卷 125-131页

作者： Liu Jinkun He Yuzhu Dept. of Automatic Automatic Control Beijing Univ. of Aeronautics and Astronautics Beijing 100083 E R. China Dept. of Engineering System of Engineering Beijing Univ. of Aeronautics and Astronautics Beijing 100083 E R. China

To improve the robustness of high-precision servo systems, quantitative feedback theory （QFT） which aims to achieve a desired robust design over a specified region of plant uncertainty is proposed. The robust design problem can be solved using QFT but it fails to guarantee a high precision tracking. This problem is solved by a robust digital QFT control scheme based on zero phase error （ZPE） feed forward compensation. This scheme consists of two parts： a QFT controller in the closed-loop system and a ZPE feed-forward compensator. Digital QFT controller is designed to overcome the uncertainties in the system. Digital ZPE feed forward controller is used to improve the tracking precision. Simulation and real-time examples for flight simulator servo system indicate that this control scheme can guarantee both high robust performance and high position tracking precision.

关键词： Quantitative feedback theory Zero phase error Feed forward compensation Servo system Flight simulator

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Novel method of extracting the feature of Partial Discharge signal from strong carrier disturbance

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Journal of Information and Computational Science 2007年第1期4卷 15-20页

作者： Cui, Xuemei Zhang, Bide Dept. of Automatic Control Engineering Chengdu University of Information Technology Chengdu 610225 China Xihua University Chengdu 610039 China

Our research purpose is to analyze the phase information of Partial Discharge PD signal and its disturbance, and to extract the feature of PD signal by using complex wavelet. The thesis, based on existing research, tries to explain our research to design complex compactly supported biorthogonal wavelets by real compactly supported biorthogonal wavelets, and then explore the features of the extraction of PD signal based on complex wavelets obtaining the general particular feature information from original signal, and finally propose ten novel complex information by combining the results of complex wavelet transform to analyze PD signal. The research demonstrates that complex wavelets are more superior to original real wavelets in identifying Partial Discharge signal, and that simulated applications and the data from laboratory can guarantee the effectiveness of the extraction of the feature of Partial Discharge and the restraint of the strong carrier disturbance.

关键词： Partial discharges

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Genetic algorithm active vibration control of a flexible plate structures

Genetic algorithm active vibration control of a flexible pla...

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51st Annual Meeting of the International Society for the Systems Sciences, ISSS 2007

作者： Mat Darus, I.Z. Tokhi, M.O. Faculty of Mechanical Engineering Universiti Teknologi Malaysia Malaysia Dept. of Automatic Control and Systems Engineering University of Sheffield United Kingdom

ISBN: (纸本)9781605600437

This paper presents the development of an active vibration control (AVC) mechanism for a flexible plate structure using a Genetic Algorithm (GAs) strategy. The global optimisation technique of GAs is utilised to obtain a dynamic model of a flexible plate structure and verified within the AVC system. The GA based AVC algorithm thus developed is implemented within a flexible plate simulation environment and its performance in the reduction of vibration of the plate is assessed. The validation of the algorithm is presented in both the time and frequency domains. An assessment of the results thus obtained is given in comparison to the AVC system using conventional recursive least squares (RLS) method. Investigations reveal that the developed GA based AVC system performs better in the suppression of vibration of a flexible plate structure compared to an RLS based AVC system.

关键词： Genetic algorithms

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Identification and control experimentation with a remote platform of an autonomous in-scale fast-ferry model

Identification and control experimentation with a remote pla...

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作者： Velasco, F.J. Revestido, E. López, E. Moyano, E. Dept. Electronics Technology and Systems Engineering and Automatic Control Univ. Cantabria Spain Spain Dept. Applied Mathematics and Computing Sciences Univ. Cantabria Spain

ISBN: (纸本)9783902661623

In this paper a parametric lineal model of heading is obtained, using a remote experimentation platform for marine vehicles. This platform has an in-scale fast-ferry physical model, TF-120 which is autonomous and has all the elements required to emulate a real vessel. The physical model is controlled remotely from a PC using Wi-Fi communications. The tests for the data acquisition with the platform for marine vehicles were carried out in the surroundings of the Bay of Santander. The parametric model identified is used to design a PID controller for heading autopilot and a simulation of this system is performed in Simulink. Copyright © 2007 IFAC.

关键词： Three term control systems

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Obtaining ship trajectories of an autonomous in-scale fast-ferry by identifying a heading model

Obtaining ship trajectories of an autonomous in-scale fast-f...

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IEEE International Symposium on Intelligent Signal Processing

作者： Velasco, F. J. Revestido, E. Lopez, E. Moyano, E. Dept. Electronics Technology and Systems Engineering and Automatic Control Univ. Cantabria Dept. Sciences and Navigation Technics Engines and Naval Architecture Univ. País Vasco (UPV/EHU) Dept. Applied Mathematics and Computing Sciences Univ. Cantabria

ISBN: (纸本)9781424408290

The aim of this paper is to obtain a model for an in-scale fast-ferry model TF-120 including the dynamics and kinematics, using a remote experimentation platform for marine vehicles. The physical model is autonomous and is controlled remotely from a PC using Wi-Fi communications. The identification and validation of the dynamical model is obtained with turning circle maneuverings. In this model are included the kinematical equations. The tests with the autonomous in-scale physical model of the high-speed ship were carried out in the surroundings of the Bay of Santander. With this model. simulations with several turbojets angles are made.

关键词： parametric identification ship physical model manoeuvring heading idemification

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Multi-agent based virtual learning environment. A socio-cultural approach

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WSEAS Transactions on Information Science and Applications 2007年第1期4卷 30-35页

作者： Moisil, Ioana Pah, Iulian Barbat, Boldur Popa, Emil Marin Faculty of Engineering Computer Science and Automatic Control Dept. Lucian Blaga University of Sibiu Blvd. Victoriei No. 10 Sibiu Romania Faculty of Sciences - Economic Informatics Lucian Blaga University of Sibiu Blvd. Victoriei No. 10 Sibiu Romania Faculty of Sociology and Social Work Babes-Bolyai University of Cluj Napoca Cluj Napoca Romania

In our paper we are proposing a complex model of the student (learner) in a virtual educational environment, supported by a multi-agent system. The whole system is centered on the student and it mainly takes into account Vygotsky's socio-cultural theory that states that social interaction plays a fundamental role in the development of cognition. The model is part of a larger project - DANTE - Socio-Cultural Models implemented through multi-agent architecture for e-learning - that has as main objective the development of a student centred framework for the virtual educational universe that facilitates collaborative learning. The virtual educational world is inhabited by agents: human agents and artificial agents that interact. Agents can be mediating agents, semiotic agents or social agents;they can be intelligent software entities or simple ones, like interface agents.

关键词： Multi agent systems

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Tool supporting the co-design of control systems and their real-time implementation: Current status and future directions

Tool supporting the co-design of control systems and their r...

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Joint 2006 IEEE Conference on control Applications (CCA), Computer-Aided control Systems Design Symposium (CACSD) and International Symposium on Intelligent control (ISIC)

作者： Törngren, Martin Henriksson, Dan Årzen, Karl-Erik Cervin, Anton Hanzalek, Zdenek Division of Mechatronics Dept. of Machine Design Kungliga Tekniska Högskolan SE-100 44 Stockholm Sweden Dept. of Automatic Control Lund Institute of Technology Faculty of Electrical Engineering Czech Technical University Prague

ISBN: (纸本)0780397975

control systems design has traditionally been treated separately from the design of its software and hardware implementation. The increasing use of embedded control in for example distributed, safety critical and mass-produced systems has caused an increasing need for the simultaneous consideration of the control system and its implementation platform during development. To this end, there is a need for both theoretical contributions and supporting tools that assist designers in understanding and analyzing the intricate relationships between the qualities, such as control performance, robustness and cost, and design parameters related to control system and platform design. This paper explores issues in co-design. A number of representative tools are compared with the purposes of illustrating different approaches concerning the levels of abstraction, analysis vs. synthesis features, constraints addressed and usability features. A perspective to the co-design tools is also provided, where opportunities and challenges for future design environments are discussed. © 2006 IEEE.

关键词： control systems

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Fuzzy observer-based control of servomechanisms subject to friction dynamics

Fuzzy observer-based control of servomechanisms subject to f...

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33rd Annual Conference of the IEEE Industrial Electronics Society, IECON

作者： Mostefai, Lotfi Denaï, Mouloud Hori, Yoichi Institute of Industrial Science University of Tokyo 4-6-1 Komaba Meguro Tokyo Japan Dept. Automatic Control and Systems Engineering University of Sheffield United Kingdom

ISBN: (纸本)1424407834

This paper proposes an approach of dynamic fuzzy modeling applied to friction compensation to enhance the performance of a servodrive system in tracking a trajectory. The fuzzy observer is derived from the dynamic nature of friction, and is used to suppress friction-induced errors. The linearity of the local models simplifies the design of the observer and its estimation capabilities are improved with the addition of a nonlinear compensating gain. Simulation results demonstrate the effectiveness of this observer-based control strategy. ©2007 IEEE.

关键词： Friction

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DEVELOPMENT TOOLS FOR DRIVE control APPLICATIONS BASED ON DSP ARCHITECTURES

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IFAC Proceedings Volumes 2007年第18期40卷 713-719页

作者： Alexandru Onea Vasile Horga Marcel Rätoi *Technical University oflasi/Dept. of automatic control and technical informatics lasi Romania Technical University oflasi/Dept of electrotechnics lasi Romania

The paper presents a Windows-based application, designed in order to assist a control algorithms developer in research and/or development activities. The application solves the main requirements of such a work. A new approach in software development was followed in order to obtain flexible and reusable DSP digital control applications. It was used a standard promoted by Texas Instruments that stimulates software modularity strategy. Experimental results show an implementation example of a modular control application using MSK243 DSP Motion Starter Kit. The software product can be used in educational process and in research as well.

关键词： digital signal processors graphic user interface software engineering software project management debugging

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Optimal guaranteed cost control for fuzzy descriptor systems with time-varying delay

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Journal of Systems engineering and Electronics 2008年第3期000卷

作者： Tian Weihua Zhang Huaguang Tian Weihua (School of Information Science and Engineering Northeastern Univ. Shenyang 110004 P. R. China Dept. of Automatic Control Shenyang Inst. of Engineering Shenyang 110136 P. R. China) Zhang Huaguang (School of Information Science and Engineering Northeastern Univ. Shenyang 110004 P. R. China.)

Based on the delay-independent rule, the problem of optimal guaranteed cost control for a class of Takagi-Sugeno (T-S) fuzzy descriptor systems with time-varying delay is studied. A linear quadratic cost function is considered as the performance index of the closed-loop system. Sufficient conditions for the existence of guaranteed cost controllers via state feedback are given in terms of linear matrix inequalities (LMIs), and the design of an optimal guaranteed cost controller can be reduced to a convex optimization problem. It is shown that the designed controller not only guarantees the asymptotic stability of the closed-loop fuzzy descriptor delay system, but also provides an optimized upper bound of the guaranteed cost. At last, a numerical example is given to illustrate the effectiveness of the proposed method and the perfect performance of the optimal guaranteed cost controller.

关键词： fuzzy descriptor systems optimal guaranteed cost control time-varying delay linear matrix inequalities (LMIs)

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