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IEEE International Conference on Industrial Informatics (INDIN)

作者： Christoph Sunder Alois Zoitl James H. Christensen Valeriy Vyatkin Robert W. Brennan Antonio Valentini Luca Ferrarini Thomas Strasser Jose L. Martinez-lastra Franz Auinger Automation and Control Institute (ACIN) Vienna University of Technology Vienna Austria Holobloc Inc. Cleveland Heigths OH USA Dept. of Electrical and Computer Engineering The University of Auckland Auckland New Zealand Schulich School of Engineering University of Calgary Calgary Alberta Canada Centro di Ricerca e Innovazione Tecnologica Crit Srl Vignola (Mo) Italy Dipartimento di Elettronica e Informazione Politecnico di Milano Milano Italy Robotics and Adaptive Systems PROFACTOR Produktionsforschungs GmbH Steyr-Gleink Austria Institute of Production Engineering Tampere University of Technology Tampere Finland Upper Austrian University of Applied Science Automation Engineering University of Applied Science Wels Austria Automation Engineering Upper Austrian University of Applied Science Wels Austria

Since IEC 61499 has reached the state of an international standard and a substantial body of research results exists the question of the authors as main intention for this paper was: Do the models of IEC 61499 solve all problems when thinking of usability and interoperability in heterogeneous system environments? The main problems discussed within the paper concern to the execution model defined for basic function blocks and the scheduling of events within function block networks.

关键词： Usability IEC standards Automation Software tools control systems automatic control Robots Adaptive systems Production engineering Job shop scheduling

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Introducing a new mathematical abstraction for modeling real time systems

Introducing a new mathematical abstraction for modeling real...

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作者： Deligiannis, Vasileios Manesis, Stamatis Electrical and Computer Engineering Dept. Division of Systems and Control University of Patras Greece

ISBN: (纸本)008045108X

Due to the increasing complexity of industrial production systems, there exists a need for the development of efficient formal approaches for their analysis and control. Various methods have been proposed and examined from researchers, without being widely adopted for direct industrial use. in general, an industrial production line can be modelled as a Discrete Event System, but a more accurate representation would result, if we considered it as a real-time system. This paper presents a new mathematical abstraction for modelling real-time systems. in comparison with the conventional methods, the proposed method introduces new formulation parameters and handles variables in a different manner. It gives the opportunity to handle both discrete and real valued variables as inputs, outputs or both. A formal definition of the method is given and some examples of computations or runs of two typical examples are also presented. Copyright © 2005 IFAC.

关键词： Discrete event simulation

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One-cycle control for the parallel operation of synchronous buck converters

One-cycle control for the parallel operation of synchronous ...

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IEEE International Symposium on Industrial Electronics 2005, ISIE 2005

作者： Berbel, Néstor Guerrero, Josep M. Cruz, Juan Miret, Jaime Castilla, Miguel Dept. Electronics Engineering Universitat Politècnica de Catalunya Spain Dept. Automatic Control and Computer Eng. CEIB Spain

Thispaperpresentsanovelcontrolforamultiphasedc-dcconverter, whichprovidestightoutputvoltageregulation,fasttransientresponse, androbustnessagainstlarge-signaldisturbancesintheinput-voltageandtheload- current. © 20... 详细信息

ISBN: (纸本)0780387384

关键词： Electric converters

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A radio and plasma wave experiment for the Solar Orbiter mission

A radio and plasma wave experiment for the Solar Orbiter mis...

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2nd Solar Orbiter Workshop

作者： Maksimovic, M. Bale, S.D. Vaivads, A. Krasnoselskikh, V. Chust, T. Balikhin, M. Goetz, K. Gough, P. Travnicek, P. Soucek, J. Rucker, H. LESIA Observatoire de Paris Place Jules Janssen 92195 Meudon cedex France Department of Physics Space Sciences Laboratory University of California Berkeley Berkeley CA 94720-7450 United States Swedish Institute of Space Physics Uppsala Sweden LPCE/CNRS 3A ave. de la recherche scientifique 47071 Orleans cedex France CETP 10-12 avenue de l'Europe 78140Vélizy France Dept. of Automatic Control and Systems Eng. University of Sheffield Mappin Street Sheffield S13JD United Kingdom School of Physics and Astronomy University of Minnesota 116 Church street S.E. Minneapolis MN 55455-0112 United States Space Science Centre School of Engineering University of Sussex Brighton BN1 9QT United Kingdom Institute of Atmospheric Physics Czech Academy of Sciences Bocni II 1401 14131 Prague 4 Czech Republic Space Research Institute Austrian Academy of Sciences Graz Austria

ISBN: (纸本)9290922052

We present in this paper the general characteristics of a Radio and Plasma Wave experiment that we wish to submit in response to a possible Announcement of Opportunity for the Solar Orbiter payload. This experiment will provide measurements of both electrostatic and electromagnetic fields and waves in a broad frequency band, typically from a fraction of a Hertz up to a few tens of MHz, covering therefore all the scientific objectives described in the Solar Orbiter Science requirements document.

关键词： Space research

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Evaluation of suboptimal real-time control results for model predictive control using improved initial conditions

Evaluation of suboptimal real-time control results for model...

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2005 IEEE International Conference on control Applications, CCA

作者： Milman, Ruth Davison, Edward Joseph Systems Control Group Dept. of Electrical and Computer Engineering University of Toronto

ISBN: (纸本)0780393538

In the Model Predictive control (MPC) framework a controller is computed using a finite horizon optimal control cost. When linear constraints are imposed on the system with a quadratic cost function, then the MPC problem can be reformulated as a constrained quadratic programming (QP) problem. In this paper active set methods are used in order to solve the QP problem associated with MPC, and it is shown that it is possible to use information from the previous sample interval in order to provide improved initial conditions for the QP problem which is applied to the subsequent sample interval. Simulations show that when real-time considerations force the used of suboptimal intermediate control values, then improved initial conditions can allow for control values which are closer to the true optimal solution than obtained when using standard initial conditions. These ideas can allow for the implementation of MPC schemes on a greater number of real industrial applications, where standard MPC control cannot be applied due to the excessive CPU time requirements. © 2005 IEEE.

关键词： Real time systems

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Adaptive H∞-control design for a class of LPV systems

Adaptive H∞-control design for a class of LPV systems

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44th IEEE Conference on Decision and control, and the European control Conference, CDC-ECC '05

作者： Karimi, H.R. Moshiri, B. Jabehdar Maralani, P. Lohmann, B. Dept. of Electrical and Computer Engineering Control and Intelligent Processing Center of Excellence University of Tehran Tehran Iran Institute of Automatic Control Technical University of Munich Munich Germany

ISBN: (纸本)0780395689

In this paper, we focus on the issue of adaptive H∞- control design for a class of linear parameter-varying (LPV) systems based on the Hamiltonian-Jacobi-Isaac (HJI) method. By combining the idea of polynomially parameter-dependent quadratic functions and vector projection method to derive an adaptive H∞-control, sufficient conditions with high precision are given to guarantee both robust asymptotic stability and disturbance attenuation of the LPV systems with unknown constant parameters. The applicability of the proposed design method is illustrated on a simple example. © 2005 IEEE.

关键词： Linear systems

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Multiobjective controller design: Optimising controller structure with genetic algorithms

Multiobjective controller design: Optimising controller stru...

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作者： Molina-Cristóbal, A. Griffin, I.A. Fleming, P.J. Owens, D.H. Dept. Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom

ISBN: (纸本)008045108X

This paper studies the open problem of reduced- and fixed-order H ∞ synthesis. Often, this non-convex constraint is tackled with iterative convex optimisation procedure over LMI constraints. in this paper, an evolutionary approach is proposed such that the trial and error approach involved in LMI techniques might be overcome. The order of the controller is optimised as a multiobjective problem over a set of controller structures, H∞, and time-domain specifications. Numerical results are presented with its counterpart the LMI procedure design, that show the advantage of investigating the Pareto optimal set resulting from the design procedure proposed. Copyright © 2005 IFAC.

关键词： Multiobjective optimization

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INTRODUCING A NEW MATHEMATICAL ABSTRACTION FOR MODELING REAL TIME systems

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IFAC Proceedings Volumes 2005年第1期38卷 141-146页

作者： Vasileios Deligiannis Stamatis Manesis University of Patras Electrical & Computer Engineering Dept. Division of Systems and Control

Due to the increasing complexity of industrial production systems, there exists a need for the development of efficient formal approaches for their analysis and control. Various methods have been proposed and examined from researchers, without being widely adopted for direct industrial use. In general, an industrial production line can be modelled as a Discrete Event System, but a more accurate representation would result, if we considered it as a real-time system. This paper presents a new mathematical abstraction for modelling real-time systems. In comparison with the conventional methods, the proposed method introduces new formulation parameters and handles variables in a different manner. It gives the opportunity to handle both discrete and real valued variables as inputs, outputs or both. A formal definition of the method is given and some examples of computations or runs of two typical examples are also presented.

关键词： Real-time systems discrete-event systems formal method automata industrial production systems

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H∞ control of linear parameter-dependent state-delayed systems

H∞ control of linear parameter-dependent state-delayed syst...

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2005 IEEE International Conference on control Applications, CCA

ISBN: (纸本)0780393538

In this paper, we deal with the issue of robust delay-independent asymptotic stability and robust disturbance attenuation problem for linear parameter-dependent systems. Using Hamiltonian-Jacoby-Isaac approach, a parameter-dependent LMI optimization is obtained. It is shown that by utilizing polynomial parameter-dependent quadratic Lyapunov functions, a parameter-dependent LMI optimization problem is derived. Therefore, state feedback control is determined by solving a parameter-independent LMI. Finally, the applicability of the proposed design is illustrated on a simple example. © 2005 IEEE.

关键词： Linear systems

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Modeling and control of IP transport in cellular radio links

Modeling and control of IP transport in cellular radio links

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作者： Möller, N. Fischione, C. Johansson, K.H. Santucci, F. Graziosi, F. Dept. Signals Sensors and Systems Automatic Control Royal Institute of Technology SE-100 44 Stockholm Sweden Dept. of Electrical Engineering University of l'Aquila Poggio di Roio I-67040 l'Aquila Italy

ISBN: (纸本)008045108X

A fundamental assumption of the TCP protocol is that packet losses indicate congestion on the network. This is a problem when using TCP over wireless links, because a noisy radio transmission may erroneously indicate congestion and thereby reduce the TCP sending rate. Two partial solutions, which improve the quality of the radio link, are power control and link-layer retransmissions. We consider a radio channel with multiple users and traffic classes, and investigate how parameters in the radio model influences TCP-related quality measures, such as the average delay and the probability of spurious timeout. The results indicate that the outer loop power control is robust to uncertainties in the radio model. This robustness property supports separation between the radio layer design and the IP and TCP layers. Copyright © 2005 IFAC.

关键词： Power control

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