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Convex hull manipulation based control performance optimisation

WSEAS Transactions on Systems and Control 2010年第8期5卷 691-700页

作者： Gróf, Patrícia Baranyi, Péter Korondi, Péter Computer and Automation Research Institute Cognitive Informatics Research Budapest Hungary Budapest University of Technology and Economics Dept. of Telecommunications and Media Informatics Budapest Hungary Budapest University of Technology and Economics Dept. of Mechatronics Optics and Engineering Informatics Budapest Hungary

This paper deals with the topic of qLPV state-space model based control design in which LMIs are used to optimize the multi-objective control performance. In this paper we investigate how the manipulation convex hull of the polytopic model influences the control performance which is derived by LMIs. We examine these influences through the control design of the two dimensional aeroelastic system's example. First we define various TP type polytopic model representations of a wing section whose vertices define different convex hulls. In the second step we investigate how these models lead to different control performances.

关键词： State space methods

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Association action rules and action paths triggered by meta-actions

Association action rules and action paths triggered by meta-...

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IEEE International Conference on Granular Computing

作者： Tzacheva, Angelina A. Ras, Zbigniew W. Dept. of Informatics Spartanburg Univ. of South Carolina Upstate SC 29303 United States Dept. of Computer Science Charlotte Univ. of North Carolina NC 28223 United States Polish-Japanese Institute of Information Technology 02-008 Warsaw Poland

ISBN: (纸本)9780769541617

Action rules are built from atomic expressions called atomic action terms and they describe possible transitions of objects from one state to another. They involve changes of values within one decision attribute. Association action rule is similar to an action rule but it may refer to changes of values involving several attributes listed in its decision part. Action paths are defined as sequences of association action rules with the assumption that the last rule in a sequence is as action rule. Early research on action rule discovery usually required the extraction of classification rules before constructing any action rule. Newest algorithms discover action rules and association action rules directly from an information system. This paper presents a strategy for generating association action rules and action paths by incorporating the use of meta-actions and influence matrices. Action paths show the cascading effect of meta-actions leading to a desired goal. © 2010 IEEE.

关键词： Decision support systems

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Determination of the Stability Parameter Space of a Two Dimensional Aeroelastic System, a TP Model-based Approach

Determination of the Stability Parameter Space of a Two Dime...

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International Conference on Intelligence Engineering Systems

作者： Patricia Grof Peter Baranyi Peter Korondi "Computer and Automation Research Institute/Cognitive Informatics Research Group Budapest University of Technology and Economics/Dept. of Telecommunications and Media Informatics Budapest University of Technology and Economics/Dept. of Mechatronics Optics and Engineering Informatics

ISBN: (纸本)9781424476527

This paper falls in the topic of qLPV state-space model based control design in which LMIs are used to optimize the multi-objective control performance. In this paper we investigate how the convex hull of the polytopic model influences the feasibility of the LMI based control design and the resulting control performances. We examine these influences through the control design of the two dimensional aeroelastic system's example. First we define various TP type polytopic model representations of a wing section whose vertices define different convex hulls. In the second step we investigate how these models lead to different control performances.

关键词： Stability Control systems Nonlinear control systems Delay effects Space technology Control design Feedback control Displacement control Force control Velocity control

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Basic course in control theory

Basic course in control theory

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2010 9th International Conference on Information technology Based Higher Education and Training, ITHET 2010

作者： Hetthéssy, Jeno Barta, András Bars, Ruth Keviczky, László Dept. of Automation and Applied Informatics Budapest University of Technology and Economics HAS-BME Control Research Group Budapest Hungary MTA SZTAKI Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary

ISBN: (纸本)9781424457922

Course material of basic control theory has been overviewed and updated recently at the Faculty of Electrical Engineering and informatics, BME. The paper describes shortly the contents and the teaching methods of the course. In the theoretical material the concept of the Youla parametrization has been introduced which gives a new insight into controller design. MATLAB exercises support understanding and interactively applying the theoretical knowledge. New lecture notes were written both for the theoretical material and for the MATLAB laboratory exercises. The course web-site provides the actual information and gives also additional learning materials. ©2010 IEEE.

关键词： Websites

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Performance/robustness limit evaluation for lyapunov-stable nonlinear plants

Performance/robustness limit evaluation for lyapunov-stable ...

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10th IFAC International Workshop on Adaptation and Learning in Control and Signal Processing, ALCOSP 2010

作者： Bányász, Cs. Keviczky, L. Dept. of Automation and Informatics Computer and Automation Research Institute of the H. Ac. of Sc. Budapest Univ. of Technology and Economics Kende u 13-17 H-1111 Budapest Hungary

ISBN: (纸本)9783902661852

Lyapunov-stable nonlinear plants can be approximated by an LTI model in many cases. If this approximation is obtained then it is possible to construct a G2DOF control system. The paper presents a new approach how the important relationships between the actuator, process and design parameters furthermore robustness measures can be determined. In this decomposition method the optimal control design for two-degree of freedom time delay control systems is discussed. Using a proper CAD algorithm the exact relationships can be plotted and the ultimate robustness limit of any control can be explicitly calculated. © 2010 IFAC.

关键词： computer aided design

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Cyclic Scheduling: Diophantine Problems Perspective

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IFAC Proceedings Volumes 2010年第4期43卷 338-343页

作者： Grzegorz Bocewicz Wojciech Muszyński Zbigniew Banaszak Koszalin University of Technology Dept. of Computer Science and Management Koszalin Poland Technical University of Wroclaw Wroclaw Poland Warsaw University of Technology Faculty of Management Dept. of Business Informatics Warsaw Poland

Cyclic scheduling concerns of rules aimed at resources assignment as to minimize a given objective function, e.g. the cycle of order execution, feasible timetabling. Such kind of problems belongs to a class of the NP-hard ones. Moreover, assuming integer character of data domain it belongs to the class of Diophantine problems that implies their undecidability. In that context, the contribution emphasizes benefits derived from Diophantine problems perspective while focuses on cyclic steady state reachability problem. The conditions sufficient for periodic behaviour of a system composed of sequential, repetitive processes are the main objective. The relationship between system resource constraints and an initial state as well as priority rules allocation is investigated. Finally, the conditions assuring steady state behavior of the system controlled by distributed set of dispatching rules are discussed.

关键词： Diophantine problem cyclic process concurrent processes state space FMS AGVs control.

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Performance evaluation of various storage formats for clinical data repositories

Performance evaluation of various storage formats for clinic...

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2010 IEEE International Workshop on Medical Measurements and Applications, MeMeA 2010

作者： Gilchrist, Jeff Frize, Monique Ennett, Colleen M. Bariciak, Erika Dept. Systems and Computer Engineering Carleton University Ottawa ON Canada School of Information Technology and Engineering University of Ottawa Ottawa ON Canada Dept. Biomedical Informatics Philips Research North America Briarcliff Manor NY United States Faculty of Medicine University of Ottawa Children's Hospital of Eastern Ontario Ottawa ON Canada

ISBN: (纸本)9781424462896

The performance of three different Entity-Attribute-Value (EAV) storage formats for Clinical Data Repositories (CDRs) is compared with regards to querying millions of data points from clinical sources to assess the amount of storage space the data use, the speed with which the data can be obtained, and the complexity of the queries required to retrieve the data. Performance results are presented that show that the hybrid EAV approach provides a nice balance of the simple and multi-data type formats. ©2010 IEEE.

关键词： Decision support systems

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Tensor Product Model Transformation Based Friction Compensation of a Mechatronic System

Tensor Product Model Transformation Based Friction Compensat...

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International Conference on Intelligence Engineering Systems

作者： Bela Takarics Peter Korondi Peter Baranyi Dept. of Mechatronics Optics and Engineering Informatics Budapest University of Technology and Economics Cognitive Informatics Research Group Computer and Automation Research Institute

ISBN: (纸本)9781424476527

The Tensor Product (TP) model transformation is a recently proposed technique for transforming given Linear Parameter-Varying (LPV) state-space models into polytopic model form, namely, to parameter-varying convex combination of Linear Time Invariant (LTI) systems. The main advantage of the TP model transformation is that it is executable in a straightforward way and the Linear Matrix Inequality (LMI) based control design frameworks can immediately be applied to the resulting polytopic models to yield controllers with tractable and guaranteed performance. The main contribution of this paper is that it represents the friction of a DC servo drive in TP model form, automatically designs LMI based controller for friction compensation. The reference signal compensation is also based on the TP model transformation. The results were simulated for speed control of the DC servo drive and were compared to other control techniques.

关键词： Non-linear system control Friction compensation DC servo drive Simulation

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A triple-random ensemble classification method for mining multi-label data

A triple-random ensemble classification method for mining mu...

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10th IEEE International Conference on Data Mining Workshops, ICDMW 2010

作者： Nasierding, Gulisong Kouzani, Abbas Z. Tsoumakas, Grigorios Dept. of Computer Science and Technology Xinjiang Normal University 102 Xin Yi Rd. Urumqi China School of Engineering Deakin University Geelong VIC 3217 Australia Department of Informatics Aristotle University of Thessaloniki Thessaloniki 54124 Greece

ISBN: (纸本)9780769542577

This paper presents a triple-random ensemble learning method for handling multi-label classification problems. The proposed method integrates and develops the concepts of random subspace, bagging and random k-labelsets ensemble learning methods to form an approach to classify multi-label data. It applies the random subspace method to feature space, label space as well as instance space. The devised subsets selection procedure is executed iteratively. Each multi-label classifier is trained using the randomly selected subsets. At the end of the iteration, optimal parameters are selected and the ensemble MLC classifiers are constructed. The proposed method is implemented and its performance compared against that of popular multi-label classification methods. The experimental results reveal that the proposed method outperforms the examined counterparts in most occasions when tested on six small to larger multi-label datasets from different domains. This demonstrates that the developed method possesses general applicability for various multi-label classification problems. © 2010 IEEE.

关键词： Learning systems

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Discrete-time modeling tools for DC-DC converters

Discrete-time modeling tools for DC-DC converters

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2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010

作者： Hamar, J. Nagy, I. Funato, H. Nishida, Y. Ohsaki, H. Masada, E. Department of Automation and Applied Informatics Budapest University of Technology and Economics Goldmann Gyorgy Ter 3 1111 Budapest Hungary MFKK Invention and Research Center Services Co. Ltd. Budapest Hungary Computer and Automation Research Institute Hungarian Academy of Science Budapest Hungary Dept. of Electrical and Electronic Engineering Utsunomiya University Utsunomiya Japan Dept. of Electric Electronics and Computer Engineering Chiba Institute of Technology Japan University of Tokyo Tokyo Japan Railway Technology Research Institute Tokyo Japan

ISBN: (纸本)9781424453955

The objective of the discrete-time modeling tools is twofold. First, they give an insight into the basic ideas of discrete-time modeling of dc-dc converters for university students and interested power electronics specialists. Second, as it is being presented below, the interactive calculation tools facilitate the fast and simple model-development in WEB browser after entering the basic circuit and load parameters. This feature can especially be useful for the practicing design engineers, since without long calculations with matrix functions the linearized discrete-time system model is immediately and automatically developed in both mathematical form (state-space equations and transfer functions in the Z domain) and also in graphical form (pole-zero map and bode plot). © 2010 IEEE.

关键词： DC-DC converters

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