IEEE Symposium on Computer-Aided Control System Design

17-19 March 1992

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  • 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 (10)
    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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  • DSSA case study: navigation, guidance, and flight director design and development

    Publication Year: 1992, Page(s):102 - 109
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (576 KB)

    The effort to create a workstation-based environment to support the development, maintenance and upgrade of avionics systems with an order-of-magnitude improvement in quality and productivity over current approaches through the reuse of large portions of well-designed and documented software is discussed. The challenges of capturing and representing knowledge for avionics navigation, guidance, and... View full abstract»

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  • Hybrid control

    Publication Year: 1992
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (104 KB)

    An effort to investigate an environment for the design, implementation and evaluation of hierarchical, distributed, intelligent hybrid control is summarized. Hybrid control here means an integrated approach to continuous physical devices (mechanical, electrical, hydraulic, etc.) being controlled by discrete computational units (digital CPUs). Nonlinear dynamical systems theory is being used to sup... View full abstract»

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  • Frequency response computation via rational interpolation

    Publication Year: 1992, Page(s):188 - 195
    Cited by:  Papers (1)
    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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  • The need for automated formula manipulation in object-oriented continuous-system modeling

    Publication Year: 1992, Page(s):1 - 8
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (560 KB)

    Automated formula manipulation is shown to be central to object-oriented continuous-system modeling. Such techniques are needed to (i) solve the causality assignment problem in modeling any kind of energy transducer, (ii) generate the equations that result from the couplings between different objects, (iii) automatically reduce structurally singular models, and (iv) take care of algebraic loops th... View full abstract»

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  • PID autotuner design using machine learning

    Publication Year: 1992, Page(s):173 - 179
    Cited by:  Papers (2)
    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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  • Integrating CACSD packages and control libraries; towards more flexible and versatile CACSD

    Publication Year: 1992, Page(s):62 - 67
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (544 KB)

    A short overview is given of the development of interactive computer-aided control system design (CACSD) packages and control libraries, and of software that has been devised to act as an interface between them. The specific roles of these CACSD components are analyzed. It is concluded that the continuing development of CACSD packages and control libraries offers convenient and promising opportuni... 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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  • Interactive loop-shaping design of MIMO controllers

    Publication Year: 1992, Page(s):76 - 81
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (412 KB)

    It is shown that many classical and singular value loop shaping problems are closed-loop convex. Consequently, loop shaping problems can be solved by efficient numerical methods. In particular, it can be determined whether or not a compensator exists that satisfies a given set of loop shaping specifications. Loop shaping design problems that are formulated as classical optimization problems, e.g.,... 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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  • 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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  • 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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  • 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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  • Modelling of power systems in Omola for transient stability studies

    Publication Year: 1992, Page(s):30 - 36
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (572 KB)

    It is illustrated how the universal, equation-based, and object-oriented modeling language Omola facilitates modeling and simulation. The application is modeling of power systems for transient stability studies. However, the intention is not to develop a full-fledged power system mode, but to illustrate general ideas with concrete examples. The focus is on structural issues of model decomposition,... 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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  • An iteration scheme for dominant singular values

    Publication Year: 1992, Page(s):215 - 217
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (148 KB)

    An iteration method is presented for determining the largest singular value (2-norm) of a matrix, and its corresponding singular vectors. Connections with the power method and Bernoulli's method are presented. A formula is derived which describes the relationship between a matrix perturbation and the perturbation of its singular values 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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  • Learning and adaptation in control systems with interactive computer graphics

    Publication Year: 1992, Page(s):180 - 187
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (532 KB)

    A neural-based computer-aided control system design tool is described. For control purposes, a learning and adaptive neural controller, called the inverse-dynamics neural controller, is proposed for unknown linear dynamical plants. The mathematical relationship describing the dynamics of the plant under control does not need to be known a priori, and no teaching signal is required to guide the lea... View full abstract»

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  • Control engineering environments in DB-Prolog

    Publication Year: 1992, Page(s):55 - 61
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (596 KB)

    The authors show that DB-Prolog, a database programming environment for engineering design, can be adapted. Its original application was to computer-aided control system design (CACSD). It is shown that it serve the wider needs of computer-aided control engineering (CACE) by using it to construct a model-building environment and a simulation environment, within DB-Prolog. These two complement the ... 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 (6)  |  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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  • 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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  • Software standards in the control systems community

    Publication Year: 1992, Page(s):238 - 241
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (280 KB)

    The need for standards in the control community is briefly motivated. The activities of the IFAC/IEEE-CSS Working Group on guidelines for computer-aided control system design (CACSD) software are described. The emerging ISO standard for data exchange is highlighted as an example of existing standards activities which the control community could take advantage of. An invitation to contribute to the... 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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  • Knowledge-based control

    Publication Year: 1992, Page(s):138 - 147
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (752 KB)

    Knowledge-based control is defined here as the management of dynamic systems whose states admit qualitative modeling. Contributions from several disparate disciplines, such as artificial intelligence, the decision sciences, and fuzzy control, are examined. An aeronautical application is used to illuminate the concepts examined. Two levels of architecture are presented for implementing qualitative ... View full abstract»

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