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Computer-Aided Control System Design, 1992. (CACSD), 1992 IEEE Symposium on

Date 17-19 March 1992

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Displaying Results 1 - 25 of 44
  • 1992 IEEE Symposium on Computer-Aided Control System Design (CACSD) (Cat. No.92TH0443-2)

    Publication Year: 1992
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  • A matrix and expert system development aid language

    Publication Year: 1992, Page(s):148 - 155
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (607 KB)

    An effort has been made to extend the matrix-oriented MATLAB syntax so that a generic expert system development environment can be incorporated into the control environment. Knowledge constructs such as rules and facts could then be handled by the language parser. The aim is to provide an integrated environment for coupling numeric and symbolic processing. A control system design package that can ... View full abstract»

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  • PID autotuner design using machine learning

    Publication Year: 1992, Page(s):173 - 179
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    A method using machine learning to automatically produce controller tuning algorithms is described. The method constitutes a decision tree which selects from a set of tuning rules the rule which is best able to improve controller characteristics. The decision tree is constructed using a training set of example systems. Evaluations of the resulting tuning algorithm are performed using a large indep... View full abstract»

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  • MaTX: a high-performance programming language (interpreter and compiler) for scientific and engineering computation

    Publication Year: 1992, Page(s):15 - 22
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    A description is given of MaTX, a high-performance programming language for scientific and engineering computation that provides not only command-line interpreter matx whose interfaces are similar to the use of Matlab but also compiler matc which accepts the same syntax as that of matx and outputs portable C language code. The users can extend the functionality of a program by realizing algorithms... View full abstract»

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  • Integrated design environment for process control

    Publication Year: 1992, Page(s):90 - 93
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    An integration strategy for designing an interactive computer-aided control system design environment for chemical processes, in which several independently developed subprograms are coordinated by a metasystem, is presented. In this approach, each subprogram can be easily modified without affecting other subprograms. It also allows other subprograms to be added to the system easily. Individual su... View full abstract»

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  • The evolution of CACSD tools-a software engineering perspective

    Publication Year: 1992, Page(s):225 - 231
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    The earlier evolution of computer-aided control system design (CACSD) tools is discussed from a software engineering perspective. A model of the design process is presented as the basis for principles and requirements of future CACSD tools. Combinability, interfacing in memory, and an open workspace are seen as important concepts in CACSD. Some points are made about the problem of buy or make when... View full abstract»

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  • Discrete event modelling and simulation in Omola

    Publication Year: 1992, Page(s):262 - 268
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    The author describes how discrete event and combined discrete event and continuous-time models are represented in Omola, an object-oriented, equation-based language for representing structured dynamic models. Discrete event behavior is represented by events with state conditions. Events can also be scheduled. The main formalism for representing discrete behavior is difference equations, which are ... View full abstract»

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  • Designing databases in real-time embedded systems

    Publication Year: 1992, Page(s):285 - 292
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    The issues involved in implementing databases in hard real-time systems are investigated. The requirements of real-time databases are examined, and two new correctness measures, external consistency and temporal consistency, are proposed. An approach to defining transaction periods so that databases can guarantee the desired real-time performance is studied View full abstract»

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  • How well can data temporal consistency be maintained?

    Publication Year: 1992, Page(s):275 - 284
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    A model of hard real-time systems where tasks access shared data is presented, and temporal consistency is defined in terms of the age and dispersion of data. Based on this model, two variants of a multiversion lock-based concurrency control algorithm and two priority-driven preemptive scheduling algorithms, rate-monotone and earliest-deadline-first, are evaluated. Simulation results indicate how ... View full abstract»

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  • Linearization algorithms and heuristics for computer-aided control engineering

    Publication Year: 1992, Page(s):156 - 164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Algorithms and heuristic logic for the accurate and robust linearization of nonlinear dynamic system models are presented. This research is robust linearization methods has yielded new conventional methods and algorithms for linearization, as well as a new expert system to aid the controls engineer in determining linearized models for nonlinear systems. The focus here is on conventional methods an... View full abstract»

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  • A new technique for solving high-index differential-algebraic equations using dummy derivatives

    Publication Year: 1992, Page(s):218 - 224
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    A technique for solving high-index problems by combining symbolic and numerical methods is presented. The technique is a variant of index reduction. In the usual manner, parts of the differential-algebraic equation (DAE) are differentiated analytically and appended to the original system. For each additional equation, a derivative is selected to be replaced by a new algebraic variable called a dum... View full abstract»

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  • Phase-space control system design

    Publication Year: 1992, Page(s):68 - 75
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    A computational environment that has been developed to aid control system design for a particular class of nonlinear applications is described. The analysis and design tools that comprise this environment are based on knowledge about phase-space dynamics of nonlinear and chaotic systems. Two implemented, complementary programs that exploit the special properties of such systems to automatically sy... View full abstract»

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  • Automatic scheduling challenges in guidance, navigation and control

    Publication Year: 1992, Page(s):293 - 300
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A perspective on the problems associated with automating the real-time process scheduling for sophisticated guidance, navigation, and control (GN&C) systems is provided. Some of the real-time scheduling issues that arise in the domain of GN&C are described. Several potentially relevant scheduling theories are described, and their relative advantages are discussed. Some of the technical pro... View full abstract»

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  • Domain-specific software architectures for intelligent guidance, navigation and control

    Publication Year: 1992, Page(s):110 - 116
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The development of a domain-specific software architecture for intelligent (adaptive) guidance, navigation and control for aerospace applications is discussed. Some distinguishing aspects of the domain are a need to adapt to a variety of specialized target hardware systems, requirements for high reliability and system certification, and increasing demands for functional integration and high perfor... View full abstract»

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  • Computer aided robust control design for interval control systems

    Publication Year: 1992, Page(s):82 - 89
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    MATLAB-based CACSD (computer-aided control system design) implementation of a newly developed body of theory in parametric robust control is discussed. The theory allows the development of a computer-aided design package that virtually extends all classical control analysis and design techniques to handle problems with robustness requirements. A brief description is given of the theory, the CACSD ... View full abstract»

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  • Computer-aided modeling, analysis, and design of discrete event systems using Petri nets

    Publication Year: 1992, Page(s):255 - 260
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The use of Petri nets for computer-aided design and analysis of discrete-event systems (DES) on the discrete event control level is described. Several CAD packages devoted to different aspects of DES in different environments are described. They include a powerful and user-friendly Petri net graphic editor, a behavior analyzer based on reachability-graph generation or reduction, a performance eval... View full abstract»

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  • A Netlib library for the systems and controls community

    Publication Year: 1992, Page(s):211 - 214
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A sublibrary of Netlib, a network-accessible software library, developed for the systems and controls community, is described. It is sponsored by the Computer-Aided Control Systems Design working group of the IEEE Control Systems Society and can be accessed by anyone who can exchange mail with US Internet hosts. Contributions of software which have been placed in the public domain by the authors a... View full abstract»

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  • Blockm-a block diagram modelling interface and its applications

    Publication Year: 1992, Page(s):242 - 249
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A MATLAB-based menu-driven multi-input multi-output linear system block diagram modeling program called BLOCKM is presented. This program can be used very easily to enter complicated models described in block diagram form. The state-space representation of the system can then easily be found and processed in the MATLAB environment. The F-14 benchmark problem is used as an example to show the block... View full abstract»

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  • Frequency response computation via rational interpolation

    Publication Year: 1992, Page(s):188 - 195
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A simple rational interpolation method is given for estimating a frequency response matrix. The method is based on a generalization of the resolvent identity that avoids the potential inaccuracies introduced by the subtraction of nearly equal values in the calculation of the difference terms. When coupled with a pole cancellation method, the resulting interpolation algorithm is accurate and effici... View full abstract»

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  • Sparse matrix applications in computer-aided control systems design

    Publication Year: 1992, Page(s):196 - 203
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    Sparse matrix applications in computer-aided control systems design (CACSD) are described. A sparse matrix data structure is described and used in subsequent algorithms for the matrix exponential, linear simulation, and frequency response matrix calculations. The sparse matrix techniques require no special computer hardware such as aprallel or vector processors. The algorithms are applied to sever... View full abstract»

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  • A model for visual observation under uncertainty

    Publication Year: 1992, Page(s):269 - 274
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The problem of observing a moving agent is addressed. A modeling approach for the visual system and its observer is advocated in which a discrete-event dynamic system (DEDS) framework is developed and events are defined as ranges on parameter subsets. In particular, a system for observing a process in which a robot hand manipulates an object is proposed. A stabilizing observer is constructed, and ... View full abstract»

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  • Domain specific software architectures-command and control

    Publication Year: 1992, Page(s):129 - 136
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The command and control aspect of the domain-specific software architectures program is discussed. The objective is to develop and demonstrate an architecture-driven, component-based capability for the automated generation of command and control applications. An overview is given of the approach being taken. The automated generation of application components in the message-handling subdomain is th... View full abstract»

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  • Caesy: a computer-aided engineering system

    Publication Year: 1992, Page(s):232 - 237
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    A new software tool, Caesy (for computer aided engineering system), is described. This tool provides a strong programming environment for research in the development of algorithms and software for computer-aided control system design. An analysis of requirements is presented along with a brief description of the user language and the design of the prototype software implementation View full abstract»

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  • Domain-specific software architectures: distributed intelligent control and management

    Publication Year: 1992, Page(s):117 - 128
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1304 KB)

    The development of a generic control architecture suitable for use as a single intelligent agent or as multiple cooperating agents is described. The generic architecture combines a task-oriented domain controller with a metacontroller that schedules activities within the domain controller. The domain controller provides functions for model-based situation assessment and planning, and intercontroll... View full abstract»

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  • AP _LIN-a tool box for approximate linearization of nonlinear systems

    Publication Year: 1992, Page(s):94 - 101
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    A toolbox for nonlinear control system design is presented. This package contains modules to approximate systems as polynomial systems of arbitrary order and then render them input-output linear or input-state linear with arbitrary-order error terms. Possibilities for real-time control are discussed View full abstract»

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