The proceedings contains 10 papers. Topics discussed include computeraidedcontrolsystemdesign, object-oriented integrated environment for CACSD tools, ANDECS framework for modelling and simulation, real-time contr...
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The proceedings contains 10 papers. Topics discussed include computeraidedcontrolsystemdesign, object-oriented integrated environment for CACSD tools, ANDECS framework for modelling and simulation, real-time controlsystemdesign, control and computeraided engineering, knowledge acquisition, object oriented interface to MATLAB, and hybrid modelling and simulation for process integration and control.
This paper addresses the advances in computer-aidedcontrolsystems design and considers how the commercial advances have pushed the envelope. It also reviews the framework reference model's place in the new marke...
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This paper addresses the advances in computer-aidedcontrolsystems design and considers how the commercial advances have pushed the envelope. It also reviews the framework reference model's place in the new market place and assesses the impact of recent technological developments. It hopes to provide a useful statement of context and point of departure for computing environment designers.
The main aim of this paper is to present an understanding of the nature, purpose and future developments in intelligent object-oriented modelling arising from a research project being carried out by the control and Co...
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The main aim of this paper is to present an understanding of the nature, purpose and future developments in intelligent object-oriented modelling arising from a research project being carried out by the control and computeraided Engineering (CCAE) research group at Swansea. Three important concepts for engineering modelling are emphasised: the independence of modelling from simulation;the object-oriented paradigm;knowledge-based systems. It is argued that intelligent technologies are natural tools for multidisciplinary engineering applications and are not only suited to qualitative approaches but also to quantitative methodologies.
This paper presents an approach to the definition of an object-oriented integrated environment for computer-aidedcontroldesign (CACSD). The key to this approach is a software architecture in the role of a framework ...
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This paper presents an approach to the definition of an object-oriented integrated environment for computer-aidedcontroldesign (CACSD). The key to this approach is a software architecture in the role of a framework supporting the communication of the tools. This communication covers two distinct levels of information, physical and conceptual. Combined use of object orientation, OMT, EXPRESS and the ODMG standard ensure that all architecture and environment needs can be successfully dealt with.
This paper describes an approach to process modeling that aims at making use of the experience with respect to process behaviour that engineers in industry accumulate during their everyday work. Making extensive use o...
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This paper describes an approach to process modeling that aims at making use of the experience with respect to process behaviour that engineers in industry accumulate during their everyday work. Making extensive use of graphical interface facilities, the approach is implemented into an interactive computer program which is designed in such a way that it can be handled by engineers without experience in process modelling. In the overall context of computeraidedcontrolsystemdesign (CACSD), the suggested approach, called MODELing, will serve as a preprocessor to the modules 'Experimental Process Identification', 'controller design' and 'Process Simulation'. The overall structure of the suggested approach is broadly outlined in this contribution while one of its features, the aggregation of a list of descriptive attributes, is considered in some more detail.
The paper describes a framework for the modelling and simulation of hybrid systems and the implementation of the strategy in the real-time Expert system tool, G2. The strategy is predicated on three key notions: hybri...
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The paper describes a framework for the modelling and simulation of hybrid systems and the implementation of the strategy in the real-time Expert system tool, G2. The strategy is predicated on three key notions: hybrid model base, interactions between dissimilar model elements, and hybrid simulation. The combination of a hybrid model structure, incorporating Grafcets, equations, rules and objects, with the real-time features of G2 is shown to be an efficient vehicle for the integration of process functions such as supervisory control, sequential control, scheduling, fault monitoring and optimisation.
ANDECS is a the new generation of open CAF system for computational experimenting in controlled dynamics systems simulation, analysis, and multi-objective optimization. It strict databased function modularization with...
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ANDECS is a the new generation of open CAF system for computational experimenting in controlled dynamics systems simulation, analysis, and multi-objective optimization. It strict databased function modularization with neutral object-oriented data- and model interfaces allows a flexible configuration of computational chains and loops. Also, its function modules can be used for basic mathematical methods, control methods, simulation, parameter- and trajectory optimization, and interactive visualization for result- and algorithm animation. ANDECS supports interoperability by exchanging both commands and data via interprocess communication with: MATLAB and Xmath for system dynamics analysis and synthesis;KHOROS and Data explorer For versatile results visualization;KISMET as robot animation package;and the like.
Development Framework automatically converts a control engineering specification into a parallel implementation. Hybrid controlsystems are a combination of real-time control law and discrete-state logic. An extension...
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Development Framework automatically converts a control engineering specification into a parallel implementation. Hybrid controlsystems are a combination of real-time control law and discrete-state logic. An extension to the Development Framework allows the design of such systems. The discrete events and continuous components of the system can be integrated when they are translated to the software engineering domain. Further, work is progress to support achievement of dependability goals is described. The assessment of competing approaches through modeling is advocated.
This talk describes a new version of the Multivariable Frequency Domain Toolbox for Matlab. The intellectual issue which arises here is whether there is a role for Matlab-4 GUI facilities in a Toolbox which provides r...
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This talk describes a new version of the Multivariable Frequency Domain Toolbox for Matlab. The intellectual issue which arises here is whether there is a role for Matlab-4 GUI facilities in a Toolbox which provides relatively low-level functionality, with a correspondingly random pattern of user interaction. My belief is that there is a role, but it is very restricted: in effect only for providing convenient 'viewing' facilities for low-level objects (which are multivariable frequency responses in the case of the MFD Toolbox). There is a more obvious role for a GUI with higher-level functions, such as frequency domain identification or parametric controller optimisation.
Graphical procedures have been used within controlsystemdesign for over two decades. In classical linear systems theory, frequency domain representations such as Bode and root locus techniques, using 2-D graphics te...
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Graphical procedures have been used within controlsystemdesign for over two decades. In classical linear systems theory, frequency domain representations such as Bode and root locus techniques, using 2-D graphics terminals, allow the engineer to assess very rapidly the behaviour of the system and picture, in a broad sense, the effect of compensation on it. Various powerful, new controldesign techniques are now available or are emerging. However they are characterised by a necessary mathematical abstraction which renders them difficult to understand for the majority of industrial engineers. Two-dimensional systems is one such area. The displays required to visualise these systems are essentially three-dimensional in nature. Modern graphical visualisation techniques used in the creation of virtual environments offer a new approach to computeraidedcontrolsystemdesign and appear to be ideal for the analysis of two-dimensional systems. Silicon Graphics hardware and software have been used to create initial virtual environments that aid the analysis and design of two-dimensional systems. These initial environments allow the user to interact with 3-D frequency response plots and 3-D output response plots. Current work also includes the generation of a graphical 2-D system compensation tool.
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