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Proceedings of IEEE Symposium on Computer-Aided Control Systems Design (CACSD)

7-9 March 1994

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Displaying Results 1 - 25 of 86
  • Role of standardization in future evolution of control design automation tools

    Publication Year: 1994
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (46 KB)

    Summary form only given. As in other design automation industries, standardization can significantly expand the utility of control system design automation tools. Standardization increases the number of users by making the tools easier to use and allowing users to mix and match the best tools from different vendors. It also allows the development of special purpose or niche tools further expanding... View full abstract»

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  • Proceedings of IEEE Symposium on Computer-Aided Control Systems Design (CACSD)

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (33 KB)
    Freely Available from IEEE
  • A computationally efficient framework for hybrid controller design

    Publication Year: 1994, Page(s):333 - 338
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A hybrid control system uses a logical discrete event system (DES) controller to supervise the behaviour of a continuous state plant. An important issue in hybrid control systems concerns precisely what constitutes “logically stable” behaviour in such systems. The challenge concerns the formulation of computationally efficient procedures for designing such logically stable systems. Thi... View full abstract»

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  • A modeling language for hybrid systems

    Publication Year: 1994, Page(s):339 - 344
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The general hybrid systems modeling language (HSML) described here will serve two purposes: to define formally what is meant by the term “hybrid system”, and to provide the basis for language-based “front ends” for hybrid system simulation environments. Features of HSML include: hierarchical, modular construction of models; consistent yet distinctive definition of continuou... View full abstract»

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  • Designing fuzzy net controllers using GA optimization

    Publication Year: 1994, Page(s):83 - 88
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    As plant specifications become complicated, more robust controller design methodologies are needed. A genetic algorithm optimizer, which utilizes natural evolution strategies, offers a promising technology that supports optimization of the parameters of fuzzy logic and other parameterized non-linear controllers. This paper shows how GAs can effectively and efficiently optimize the performance of p... View full abstract»

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  • The role of hybrid systems theory in virtual manufacturing

    Publication Year: 1994, Page(s):345 - 350
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    Virtual Manufacturing (VM) is an integrated, synthetic manufacturing environment exercised to enhance all levels of decision and control in a manufacturing enterprise. VM environments are being proposed to improve the authors' military preparedness, enable lean and agile manufacturing, improve product and process design. Reduce manufacturing risks, improve manufacturing design and operation, suppo... View full abstract»

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  • A hybrid analytical/intelligent approach to the modeling and control of DEDS

    Publication Year: 1994, Page(s):47 - 53
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Many manufacturing processes, such as those arising in electronic circuit assembly and packaging, are characterized by both continuous variables and discrete event dynamics. The design of innovative end effective monitoring and control strategies for these processes requires the development of new models that can capture the hybrid continuous/discrete dynamic nature of the processes and can addres... View full abstract»

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  • A nonlinear PID-type controller utilizing fuzzy logic

    Publication Year: 1994, Page(s):89 - 94
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    This paper presents a new controller model, the fuzzy-PID controller, which merges PID control and fuzzy control in order to improve system performance especially when nonlinearity, uncertainty and complexity are involved. The proposed model provides a mechanism to achieve PID control selftuning and encodes different control strategies for use under different circumstances in a fuzzy rulebase. The... View full abstract»

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  • Integrating control and software views in a CACE/CASE toolset

    Publication Year: 1994, Page(s):353 - 358
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Significant previous and ongoing work exists in the area of computer-aided control engineering toolsets to support the specification and analysis of control systems. Several toolsets exist to support control system design and analysis, and a few tools exist to automatically generate control software. Analogous work on computer-aided software engineering toolsets for high-level specification and an... View full abstract»

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  • Tradeoffs in frequency-weighted H-control

    Publication Year: 1994, Page(s):469 - 474
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    An important problem in H∞-control is the design of a controller that minimizes the H∞ -norm of a closed-loop transfer matrix, multiplied by a suitable weighting function which reflects different performance requirements over different frequency bands. Often, these are competing requirements, and in this paper, we show how we may efficiently comp... View full abstract»

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  • The ANDECS-CACE framework A RSYST for integrated analysis and design of controlled systems

    Publication Year: 1994, Page(s):389 - 394
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    Computer-aided control engineering (CACE) environments, in order to be reusable in a broad spectrum of applications, have to be based on an open software framework which provides seven classes of services: database services; model-definition services; algorithmic services; tool-control services; task-control services; user-interaction services; message services. Details of the ANDECS framework A R... View full abstract»

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  • Computer-aided design of intelligent control systems for discrete event dynamic systems

    Publication Year: 1994, Page(s):55 - 60
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    Presents a Petri nets-based approach to both modelling the discrete event dynamic systems (DEDS) to be controlled and the representation of knowledge about details or specifications concerning the control task. In order to synthesize intelligent control systems for the DEDS a procedure utilizing the Petri nets-based model of both the DEDS and the knowledge representation (both of them expressed in... View full abstract»

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  • Open environments and object-oriented methods: the way forward in computer-aided control system design

    Publication Year: 1994, Page(s):3 - 12
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    Two current trends in the computer industry are towards open systems and object-oriented methods. The relevance and significance of these for computer-aided control system design are examined. It is observed that, compared with computer-aided software engineering, there is no open system policy and a lack of design environments. A variation on the open environment for computer-aided software engin... View full abstract»

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  • The CASCIDA project: a computer-aided system control for interactive design and analysis

    Publication Year: 1994, Page(s):247 - 251
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Since 1985 at Setif University, Algeria, the author has initiated and worked on a project which was aimed at the development of a CACSD System. The results of the CASCIDA project (Computer Aided Systems Control for Interactive Design and Analysis) are briefly described. More importantly and over the years, this project laid down the basis for, and the nurturing of, a whole intellectual environment... View full abstract»

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  • Computation of basic fuzzy controllers by approximation of time-optimal controllers

    Publication Year: 1994, Page(s):95 - 100
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    This paper presents a method to compute robust fast nonlinear controllers for real plants for which a-not necessarily precise-mathematical model is available. The development is based on ideas from fuzzy control, but in contrast to usual fuzzy controller designs, most of the rules are not derived from heuristics but rather are mathematical formulae which, together with the standard fuzzy quantizat... View full abstract»

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  • A project based environment for computer-aided control engineering

    Publication Year: 1994, Page(s):297 - 302
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Probably the largest single factor inhibiting the development of an environment supporting the full control engineering design cycle has been the lack of widely recognised standards in this field. The issue of standardisation can be viewed on two levels, the representation of the dynamic system model itself and the provision of database facilities, including those high-level facilities required fo... View full abstract»

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  • Hybrid systems as a substrate for DSSA

    Publication Year: 1994, Page(s):359 - 361
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    DSSA entails severe modelling, simulation, and validation problems because of the diversity of interacting physical and logical systems which have to be represented. Development of software specifications and development of physical system specifications for what are often interacting reactive systems cannot be separated. Software writers and engineers wish this were not so, but it is. Neither can... View full abstract»

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  • PARSIM: a parallel optimization tool

    Publication Year: 1994, Page(s):579 - 584
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Current computer aided control system design environments seldom support optimization methods for controller design in a truly interactive manner. A prototype tool, called PARSIM, supporting parallel processing, optimization and a graphical user interface is presented addressing many of the problems inherent in current approaches to multiobjective optimization based design methods. An XWindows int... View full abstract»

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  • State-space algorithms for manipulating rational matrices

    Publication Year: 1994, Page(s):475 - 480
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    State-space descriptions have been proven to be effective means for manipulating proper rational matrices. In many systems and control applications, however, rational matrices representing system transfer functions are not necessarily proper. Ψlab, a scientific software package developed at INRIA, uses a state-space description for both proper and improper rational matrices View full abstract»

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  • Stability robustness analysis and design for linear systems with structured time-invariant uncertainty

    Publication Year: 1994, Page(s):403 - 408
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    A new sufficient condition is derived from a general framework for linear state space models maintaining asymptotic stability in spite of existence uncertainty. Constant structured design problem is solved by using a numerical optimization program. In all examples we examined the results of stability robustness analysis and synthesis based on our sufficient condition are less conservative than tho... View full abstract»

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  • An intelligent front end for the H controller design

    Publication Year: 1994, Page(s):61 - 66
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    An intelligent front end for the H∞ control system design method is described. Systematic procedures for the H∞ controller design are presented, and they are applied to the control system design of a single flexible link. The authors' approach provides a coupling of the design knowledge and design algorithms for carrying out the controller design. Design knowledge... View full abstract»

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  • Multiscale models and controllers

    Publication Year: 1994, Page(s):13 - 26
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    Presents results in the area of simulation, design, and control of complex systems using a new approach which unifies modeling, prediction, and optimization capabilities for decision making, planning, and real time operation. The system for control and simulation employs multiscale knowledge representation with multiresolutional nesting as a major principle of knowledge organization, programming, ... View full abstract»

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  • Modular simulation for logic, distributed, real-time control systems

    Publication Year: 1994, Page(s):225 - 230
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The present paper describes a CAD environment developed to model, simulate and evaluate the correctness and performance of distributed real-time control systems. The flexible modular approach allows the clear separation of the definition and evaluation of a control algorithm as a stand-alone entity from that of the synchronization mechanisms among tasks and processors. Particular care has been pai... View full abstract»

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  • Containers-a step towards objects with Matlab

    Publication Year: 1994, Page(s):277 - 283
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    The need for object-oriented model representations in CACE software is discussed. It is shown how this can be achieved, to some extent, using Matlab, preserving maximal consistency with existing syntax, programming solutions and interaction style. We introduce `containers', which have some of the commonly accepted properties of `objects'. Examples of the use of containers are given. The paper disc... View full abstract»

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  • Inverse dynamics control of a steam power plant

    Publication Year: 1994, Page(s):205 - 210
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    In this paper an artificial neural net is used to control the boiler of a steam power plant. The proposed controller is using a multi-input, multilayer artificial neural network, trained off-line using the error backpropagation algorithm, over a wide range of operating conditions. The data used during the learning phase are calculated by simulating the drum boiler dynamics. The proposed controller... View full abstract»

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