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 Computer Aided 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.
The proceedings contains 10 papers. Topics discussed include computer aided control system design, 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 computer aided control system design, object-oriented integrated environment for CACSD tools, ANDECS framework for modelling and simulation, real-time control system design, control and computer aided engineering, knowledge acquisition, objectoriented interface to MATLAB, and hybrid modelling and simulation for process integration and control.
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.
A graphical 'front end' using the freely available Tcl/Tk programming toolkit is used to provide a point and click and drag and drop interface to the users of interface to Matlab. The overall effect is an intu...
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A graphical 'front end' using the freely available Tcl/Tk programming toolkit is used to provide a point and click and drag and drop interface to the users of interface to Matlab. The overall effect is an intuitive and easy to use interface to Matlab which may also be utilized to provide the same structure to a similar tool with only minor code changes. The implementation of the drag and drop philosophy projects an objectoriented window onto the underlying application providing significant gains in learning and productivity.
This paper presents an approach to the definition of an object-oriented integrated environment for computer-aided control design (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-aided control design (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.
The paper is concerned with the online rescheduling of mass rapid transit (MRT) trains after sudden increases of passenger flow, In particular, the use of predictive fuzzy control for carrying out the train dwell-time...
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The paper is concerned with the online rescheduling of mass rapid transit (MRT) trains after sudden increases of passenger flow, In particular, the use of predictive fuzzy control for carrying out the train dwell-time in event-driven an framework is considered. Two fuzzy expert systems for improving the performance of MRT systems and for enhancing functions of the typical automatic train control (ATC) systems are proposed. Using the event-driven approach, the only decisions to be made in each of the two fuzzy expert systems will be whether or not to dispatch the train at a proposed reschedule time. Due to its simplicity, the proposed methodology is fast enough for online implementation. An object-oriented been developed for control and simulation algorithms that reduces the efforts required for understanding the interactive operation of railway subsystems and for preparing study data. Therefore, the efforts for future development will be reduced. The proposed approach is used for adjusting the train dwell time and for studying the effects on the MRT performance. Results show that the train dwell time adjustment is an effective means of maintaining the quality of train service after sudden load disturbances. Several simulated case studies are included to illustrate the effectiveness of the proposed approach.
Combining asynchronous transfer mode over a passive optical network (APON) can provide broadband services as defined by the international telecommunications union (ITU). The medium access control (MAC) layer is of pri...
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Combining asynchronous transfer mode over a passive optical network (APON) can provide broadband services as defined by the international telecommunications union (ITU). The medium access control (MAC) layer is of primary importance to the access scheme as it controls the flow of traffic in the access network. It is therefore beneficial to model MACs for APONs to provide a performance evaluation without the expensive and time consuming job of building prototypes. This paper describes the simulation and performance comparison of a selection of proposed MAC schemes for APON, using the block oriented network simulator (BONeS) simulation software. The protocols simulated are all based on the TDM/TDMA technique, each with a different polling scheme, namely;demand, cyclic and semi-static. Both the development of a simulation strategy using a common simulation platform and the implementation of the permit distribution algorithm for the MAC protocols are described. The simulations show that the performance characteristics of the MACs are to a large degree comparable. There is, however, superior performance in the parameters measured by the protocol based on demand polling.
This paper describes the use of Prolog in the implementation of a Knowledge-based Environment for Modelling and simulation (KEMS). The basis of the implementation is the AI frame paradigm which provides a conceptual f...
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This paper describes the use of Prolog in the implementation of a Knowledge-based Environment for Modelling and simulation (KEMS). The basis of the implementation is the AI frame paradigm which provides a conceptual foundation for the design of the Model Base, the simulation Code Generator and the Knowledge Acquisition Module which are the Prolog-based components of KEMS. The experiences derived from KEMS provide a springboard from which the wider applications of Logic programming in control Engineering are discussed. Six application areas are identified, including modelling, the design of from-ends for CAD packages, the design of object-oriented databases, the prototyping of engineering concepts, knowledge-based control and the design of decision-support systems.
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 Computer Aided 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.
The paper describes the use of Prolog in the implementation of a Knowledge-based Environment for Modelling and simulation (KEMS). The basis of the implementation is the AI frame paradigm which provides a conceptual fo...
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The paper describes the use of Prolog in the implementation of a Knowledge-based Environment for Modelling and simulation (KEMS). The basis of the implementation is the AI frame paradigm which provides a conceptual foundation for the design of the model base, the simulation code generator and the knowledge acquisition module which are the Prolog-based components of KEMS. The experiences derived from KEMS provide a springboard from which the wider applications of logic programming in control engineering are discussed. Six application areas are identified, including modelling, the design of front-ends for CAD packages, the design of object-oriented databases, the prototyping of engineering concepts, knowledge-based control and the design of decision-support systems.
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