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Second International Conference on Intelligent Systems Engineering, 1994

5-9 Sep 1994

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Displaying Results 1 - 25 of 71
  • A hybrid knowledge processing architecture

    Publication Year: 1994, Page(s):372 - 377
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (444 KB)

    An example of a hybrid system architecture integrating connectionist models and symbolic knowledge processing is introduced. In particular the inclusion of non-symbolic knowledge sources (data from physical processes, measurements, sensors etc.), transformation of learned knowledge into a symbolic form (rule extraction) and associative storage as well as retrieval of information are discussed by m... View full abstract»

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  • Rule-based Boolean control of discrete-event systems-an arithmetic approach

    Publication Year: 1994, Page(s):218 - 222
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    The paper addresses finite state machines which provide suitable mathematical models for discrete-event dynamical systems. Boolean automata are of particular interest. Different from classical automata theory, an arithmetic representation of Boolean functions is used based on multilinear polynomials. By this technique finite automata are imbedded in the Euclidean vector space which allows to detec... View full abstract»

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  • An adaptive approach in production scheduling based on the mixed graph model

    Publication Year: 1994, Page(s):413 - 418
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    Proposes computer-aided heuristic approach for production planning and scheduling based on the ideas of adaptation. The objective is to make the scheduling theory more useful for operations management and production research workers. The methodology proposed bridges exact algorithms developed in the frameworks of scheduling theory, and methods of production scheduling. It is devised to combine mer... View full abstract»

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  • Arc welding seam tracking system based on artificial neural networks

    Publication Year: 1994, Page(s):177 - 182
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    A new approach towards controlling an arc welding seam tracking system based on process-oriented data is presented; an artificial neural network is the central controlling element. Special features of neural networks, such as trainability, abstraction capability and fault-tolerance give this controlling system significant advantages. The adaptation of the system to new welding tasks has been simpl... View full abstract»

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  • Flatness defects detection in rolling products with real-time vision system

    Publication Year: 1994, Page(s):407 - 412
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    Quality manufacturing is very important in order to increase the steel industry's competitiveness. For this reason, steel companies have been investigating ways to manufacture higher quality products. The authors have developed a system which is able to detect and measure flatness defects in rolling steel products. The system, which is not destructive, is made to be placed in hot strip mills, afte... View full abstract»

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  • A Petri-net representation of the qualitative behaviour of a dynamical continuous-time system

    Publication Year: 1994, Page(s):223 - 228
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    In this paper an approach is presented how a qualitative model of a dynamical continuous-variable system can be set up. The method is based on Petri nets which have been successfully used so far to describe discrete-event systems. Places will be used to represent qualitative states whereas transitions model the qualitative state transitions of the system. The influence of input variables is reflec... View full abstract»

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  • Decision support system for fault diagnosis and recovery of gas distribution networks

    Publication Year: 1994, Page(s):442 - 447
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    This paper describes an expert system for online fault detection and diagnosis of gas transmission networks, combining model- and knowledge-based methods. It consists of a set of hierarchically structured components which include signal processing, state observation, rule-based knowledge processing as well as an advanced user interface. In addition, an intelligent hypertext tool is integrated into... View full abstract»

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  • A CLP framework for time-related reasoning in industrial applications

    Publication Year: 1994, Page(s):183 - 188
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (424 KB)

    The aim of this paper is to present an implementation of the “general representation formalism”, a formalism to represent temporal knowledge, based on constraint logic programming (CLP). The work is a result of the ESPRIT project EQUATOR which focused on new formalisms and tools for developing applications requiring sophisticated time-related reasoning techniques. The general represent... View full abstract»

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  • Learning control and its place in automation

    Publication Year: 1994, Page(s):9 - 36
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (920 KB)

    The paper discusses for learning control the background, structures, basic elements, properties and some applications in automation tasks. It is based mainly on experiences built up during the last 10 years at the Control Systems Theory and Robotics Department of the Institute of Control Engineering at the Technical University Darmstadt View full abstract»

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  • Optimizing distributed production planning

    Publication Year: 1994, Page(s):419 - 424
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB)

    Production planning is one of the big challenges of artificial intelligence because of its complexity and the dynamic behavior of the different components of a manufacturing environment. We present a new organization scheme for a distributed planning method to coordinate the planning and scheduling of several autonomous agents as intelligent robots and of manufacturing cells on the task level. An ... View full abstract»

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  • Qualitative control with quantitative models

    Publication Year: 1994, Page(s):229 - 234
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    This contribution addresses the issue of qualitative control based on quantitative models: A continuous plant is controlled via symbolic, or quantized, measurement and control signals. Quantization levels may be arbitrarily coarse (e.g. “temperature is too high“, “ok” or “too low”, “valve is open” or “closed”). Sensor quantization is assu... View full abstract»

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  • Knowledge based monitoring and diagnosis in machine maintenance

    Publication Year: 1994, Page(s):448 - 454
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    Maximum availability of cost intensive machinery is highly dependant of minimizing downtime caused by maintenance. Software systems for monitoring and diagnosis can help to reduce downtime. Permanent monitoring of a machine guarantees a reliable detection of most faults. An interactive diagnosis system can guide the maintenance staff to accomplish their tasks. A system architecture which supports ... View full abstract»

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  • Optimizing constraints for speed: benchmarking temporal logic

    Publication Year: 1994, Page(s):189 - 194
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    The notion of local constraint processors (“constraint chips”) is introduced. Local constraint processors are defined as hardware chips for processing local (discrete-valued and/or continuous-valued) constraints of arbitrary arity (also referred to as a “constraint class”) in a constraint network. A family of constraint chips supporting temporal scheduling and planning task... View full abstract»

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  • Supporting qualitative model specification

    Publication Year: 1994, Page(s):37 - 42
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB)

    Constructing a model for qualitative simulation is a time consuming and difficult task. It can be divided into two main subtasks: i) specification of a preliminary model and ii) simulation and model debugging. This paper focuses on the task of specifying a preliminary model. It identifies the subtasks involved, and identifies whose execution can be supported. Based on this analysis a graphical use... View full abstract»

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  • Multiple capacity single vehicle job scheduling for AGV's

    Publication Year: 1994, Page(s):348 - 353
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    Although job scheduling for automated guided vehicle (AGV) systems has hardly been investigated, it is a very important problem as it is highly decisive for the performance of such a system. Current solutions focus on the simple case of vehicles loading only one unit at a time. However the introduction of multiple capacity vehicles increases the need for more general solutions. A heuristic optimis... View full abstract»

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  • A cognitive engineering approach with AI techniques to reactive scheduling in the supervision of dynamic manufacturing processes

    Publication Year: 1994, Page(s):425 - 433
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (588 KB)

    Recent advances in artificial intelligence (AI) techniques have greatly increased the potential for applying them to engineering intelligent real-time control and scheduling systems as joint man-machine cognitive systems. Rapid reactivity is becoming an increasingly important competitive factor for today's manufacturing companies in planning and controlling their shop floor processes. The construc... View full abstract»

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  • Application of fuzzy logic and neural network to the control of a flame process

    Publication Year: 1994, Page(s):235 - 240
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    In this paper, we proposed an implementation of a vision-guided flame control system based on fuzzy logic and neural network. The fuzzy control approach avoids the problem of constructing a burning model for the flame process. The use of neural network makes it easy to increase the number of control parameters and provides the system possibility to adjust its performance automatically View full abstract»

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  • The application of fuzzy logic to position control: optimisation, simulations and experiments

    Publication Year: 1994, Page(s):255 - 261
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB)

    In this paper fuzzy logic is applied to position control. Comparisons are made with other simple nonlinear controllers, and optimisation on a system with one degree of freedom has been carried out for these controllers using the same simulated annealing method. It is found that the full simulated annealing algorithm was not required for the idealised, mathematical model but in the real systems the... View full abstract»

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  • Control system fault-toleration ensuring via self-organization

    Publication Year: 1994, Page(s):461 - 466
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    A new approach of fault-toleration enhancement via self-reorganizing control, based on principles of three-level hierarchy, deep diagnosis and flexible fault counteraction is considered. Methods of solving the main problems of fault-toleration for technical plant's standard control system are described. The results of digital simulation of aircraft fault-tolerant control system are given View full abstract»

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  • Classification of geophysical features with CALM neural networks

    Publication Year: 1994, Page(s):138 - 143
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (460 KB)

    Unsupervised CALM neural networks are used to classify geophysical features in quasi-real-time. Geophysical features are extracted from geophysical datasets using classical pre-processing techniques. Corresponding feature vectors, describing the properties of such geophysical features, are interactively reduced to vectors containing the most suitable features for the classification purpose. The im... View full abstract»

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  • The event calculus at work: a case study in the medical domain

    Publication Year: 1994, Page(s):195 - 200
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    Efficiency issues involved in temporal reasoning have often been ignored, and this is a major limiting factor to the application of temporal reasoning in realistic domains. In this paper we adopt the event calculus (EC) model of time and change, enriched with preconditions. The addition of preconditions, which is crucial to deal with real-world examples, heavily deteriorates the performance. There... View full abstract»

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  • Using causal ordering for explanation in model-based diagnosis of continuous dynamic systems

    Publication Year: 1994, Page(s):274 - 279
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (464 KB)

    This paper presents a preliminary approach to providing an explanation facility for model-based diagnostic systems by the use of causal ordering. An explanation algorithm is described that allows explanations to be automatically generated for diagnostic findings by searching through the causal graph derived from the structural and behavioural model of the physical system under diagnosis. Typical e... View full abstract»

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  • A methodological framework for modelling complex technical marine systems for diagnostic purposes

    Publication Year: 1994, Page(s):298 - 303
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (496 KB)

    Hierarchical modelling of multiple interacting complex marine technical systems for model-based diagnosis is presented. A component-centered view of such systems, typically carrying a main flow, such as heavy fuel oil or steam/condensate, enables definition of so-called elementary components. Transformers, as special components interacting on different systems, are modelled by means of several ele... View full abstract»

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  • MYCROFT: a framework for qualitative reasoning

    Publication Year: 1994, Page(s):43 - 48
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (424 KB)

    In this paper, three qualitative simulators within the constraint based ontology (epitomised by QSIM) are reviewed. The best features from these are incorporated in a new qualitative reasoning framework: Mycroft. This framework permits the results of different approaches to qualitative reasoning to be explored within a single environment. The argument focuses on the semi-constructive and construct... View full abstract»

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  • Hybrid multi-agent framework for real-time knowledge-based control

    Publication Year: 1994, Page(s):354 - 359
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    The approach proposed is intended to take advantage of simultaneous use of agents of different types that, whilst being essentially independent and running mainly concurrently, produce outputs complementing one another in generating the final control decisions. A simple structure of modules cooperation, oriented mainly on a one-directional flow of module activations, enables a high-speed real-time... View full abstract»

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