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Emerging Technologies and Factory Automation, 1994. ETFA '94., IEEE Symposium on

6-10 Nov. 1994

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  • ETFA '94. 1994 IEEE Symposium on Emerging Technologies and Factory Automation. (SEIKEN) Symposium) - Novel Disciplines for the Next Century - Proceedings

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (18 KB)
    Freely Available from IEEE
  • Genetic algorithm with age structure and its application to self-organizing manufacturing system

    Publication Year: 1994, Page(s):472 - 477
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (381 KB)

    The genetic algorithm has recently been demonstrated its effectiveness in optimization issues, but it has two major problems: a premature local convergence and a bias by the genetic drift. In order to solve these problems, we propose a new genetic algorithm with an age structure of a continuous generation model. The new genetic algorithm is applied to a self-organizing manufacturing system-a proce... View full abstract»

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  • Motion planning for a redundant manipulator by genetic algorithm

    Publication Year: 1994, Page(s):466 - 471
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (299 KB)

    A motion planning method is proposed for cutting a three dimensional workpiece by a redundant manipulator with six degrees of freedom. The method applies a genetic algorithm to optimize the rotational angles of the end-effector on a path. For a fitness function, an evaluation function is defined based on references from skilled operators. Using the proposed method the operator only has to determin... View full abstract»

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  • A new approach to genetic based machine learning for efficient improvement of local portions of chromosomes

    Publication Year: 1994, Page(s):458 - 465
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (457 KB)

    This paper presents a new approach to genetic based machine learning (GBML). The new approach is based on an imaginary mechanism of evolution. The authors call this new approach the Nagoya approach. The Nagoya approach is efficient in improving local portions of chromosomes. A simulation of simple computer graphics using the new approach is done. An obstacle avoidance of mobile robot is also simul... View full abstract»

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  • Co-evolving genetic algorithm with filtered evaluation function

    Publication Year: 1994, Page(s):454 - 457
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (349 KB)

    As a function optimizer or a search procedure, genetic algorithms (GAs) are very powerful and have many advantages. Fundamental research concerning the internal behavior of GAs has highlighted their limitations as regards the search performances, called GA-hard problems. The reason for these difficulties seems to be that GAs generate insufficient strategies for the convergence of populations. To o... View full abstract»

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  • The immune mechanism, adaptation, learning for the multi agent system

    Publication Year: 1994, Page(s):446 - 453
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (359 KB)

    In this research, we present an adaptation mechanism for the multi-agent system. We applied the biological "immune system" to our new algorithms. The immune system works for the "host defense mechanism" and the "homcostasis maintenance mechanism" against foreign enemy or the internal abnormality.<> View full abstract»

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  • Learning of decision regions based on the genetic algorithm

    Publication Year: 1994, Page(s):438 - 445
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (551 KB)

    A method for nonparametric (distribution-free) learning of complex decision regions in n-dimensional pattern space is introduced. Arbitrary n-dimensional decision regions are approximated by the union of a finite number of basic shapes. The primary examples introduced in this paper are parallelepipeds. By explicitly parameterizing these shapes, the decision region can be determined by estimating t... View full abstract»

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  • Evaluating the complexity of Petri nets and ladder logic diagrams for sequence controllers design in flexible automation

    Publication Year: 1994, Page(s):428 - 435
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (537 KB)

    This paper presents a methodology to evaluate the complexity of Petri nets (PNs) and ladder logic diagrams (LLDs) for sequence controllers design. Complexity of a design is characterized by the number of basic elements used to model the given control logic. More specifically, this paper presents analytical formulas to estimate the number of basic elements to model certain building blocks of logic ... View full abstract»

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  • Compositional Petri net environment

    Publication Year: 1994, Page(s):420 - 427
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (587 KB)

    This paper addresses the problem of application Petri nets to real-world parallel and distributed systems of industrial size. It is pointed out that in many cases a well-known hierarchy/refinement technique does not work perfectly. We suggest another solution based on an algebraic approach to Petri net representation. Two levels of compositionality are introduced. The first one, an algebraic level... View full abstract»

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  • Self-checking implementation of Boolean interpreted Petri nets

    Publication Year: 1994, Page(s):414 - 419
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (430 KB)

    This paper presents a technique of constructing a self-checking synchronous implementation of a Boolean interpreted Petri net. The validated Petri net specification is modeled with a circuit that automatically detects faults visible at Petri net level. The so called direct approach is used in modeling Petri nets by hardware. The faults that can be checked at hardware level manifest themselves at P... View full abstract»

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  • Verification of asynchronous circuits by Petri net unfoldings

    Publication Year: 1994, Page(s):404 - 413
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (924 KB)

    In this paper we use the interpreted Petri nets (signal transition graph (STG) model) for a verification of asynchronous circuits. The main property in the analysis is the speed-independence of a circuit, i.e. the independence of circuit functioning from the delays of gates. The idea of analysis is based on the PN unfolding into an occurrence net. The improved method of unfolding is suggested, in ... View full abstract»

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  • Proposal for a generic prototyping approach

    Publication Year: 1994, Page(s):396 - 403
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (853 KB)

    The procedure we define is parametrized by: the input description formalism which can be any structured and/or hierarchical representation; and the programming language used to describe the prototype of a system. Our prototyping procedure involves three description levels: 1) the input formalism is a semi-formal description that only allows syntactic checks (completeness and coherence of the speci... View full abstract»

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  • New results in systematic construction of functional abstractions of Petri net models of flexible manufacturing systems

    Publication Year: 1994, Page(s):388 - 394
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The use of generic models in the synthesis of FMS systems, which allows for rapid modelling and analysis, does not ease the verification task difficulty. Even though generic modules can be verified separately, the verification of the interconnections between modules requires the whole model to be considered. A potential solution is to replace the generic modules with their functional abstractions ... View full abstract»

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  • On the application of coloured Petri nets to computer aided assembly planning

    Publication Year: 1994, Page(s):381 - 387
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (534 KB)

    The problem of assembly process planning is particularly critical for the automation and integration of production, due to the combinatorial complexity and the requirement of both flexibility and productivity. Several planning methodologies and techniques have been proposed in the literature, using an approach limited to specific product typologies and structures. Some of them are more suitable fo... View full abstract»

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  • A Petri net approach to modeling and performance analysis of Fiber Data Distributed Interface (FDDI) network

    Publication Year: 1994, Page(s):373 - 380
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    This paper presents a Petri net approach to modeling and performance analysis of the Fiber Distributed Data Interface (FDDI) network. The service type described in the "Timed Token Rotation" protocol, supporting both synchronous and asynchronous traffic, is modeled using stochastic Petri nets, and its performance is conducted for both symmetric/asymmetric cases. In order to deal with large network... View full abstract»

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  • Analysis of function charts for control systems using Petri nets

    Publication Year: 1994, Page(s):365 - 372
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (677 KB)

    As opposed to the widely investigated continuous control, this paper concentrates on event-related control modelling and validation. In this case, the process and related process control can be described by steps and transitions, which can be represented very concisely by function charts for control systems model (Grafcet). As it is difficult to validate the Grafcet model, we propose to transform ... View full abstract»

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  • From the Petri net model to real time control: bases of a development package

    Publication Year: 1994, Page(s):360 - 364
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (367 KB)

    Any discrete system with a behavior which lends itself to a graphical representation can be a candidate for a Petri net modelization. In this way the Petri net model can be adopted more and more in process control, especially within the framework of factory automation and flexible manufacturing systems, for low level control as well as for coordination and monitoring levels. Based on a high level ... View full abstract»

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  • Net-based cooperative control for autonomous distributed systems

    Publication Year: 1994, Page(s):350 - 357
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    This paper discusses an autonomous distributed control system to overcome the deficiencies in robustness against failures, flexibility, and set-up speed of conventional centralized control systems. In order to realize the autonomous distributed control for intelligent manufacturing systems, we propose a model and a method to realize this model. The model consists of numerous autonomous agents and ... View full abstract»

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  • Automated digitization and geometric modelling of refurbished components for deburring

    Publication Year: 1994, Page(s):345 - 349
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (366 KB)

    A scheme is proposed for the automated edge deburring of refurbished components with intricate geometries. An adaptive routine is presented that gathers a small number of digitized positional data points to construct a differential geometric model with a prescribed accuracy. The affine surface connections, from whence one calculates the Gaussian curvature, are computed and used to determine an edg... View full abstract»

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  • Fieldbus and CNC architecture: towards a CNC software factory

    Publication Year: 1994, Page(s):338 - 344
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (647 KB)

    The paper explains the needs for introducing fieldbuses in machine-tools, a design choice whose economic benefits may not be apparent. We first explain the general trends of the factory of the future and its impact on the machine-tools characteristics and hence on computerised numerical controllers (CNC). We then show how the requirements can be fulfilled and the resulting architecture that opens ... View full abstract»

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  • Planning-based visual programming for sequence control

    Publication Year: 1994, Page(s):330 - 337
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (585 KB)

    This paper describes the planning-based visual programming for sequence control in the prototype system: VIPS/S-SFCD (Visual Programming System for Sequence control program Specification Design). VIPS/S-SFCD features: 1) a rehearsal-based visual programming technique in which designers specify the goal states of machines using graphical representations, and 2) a planning method that infers machine... View full abstract»

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  • Tele-existence robotic system with autonomous mobility

    Publication Year: 1994, Page(s):319 - 329
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (699 KB)

    The semi-autonomous, human-cooperative system is complemented by operator's maneuvering to compensate for the level of autonomy missing in the robot. Because the robot is human-cooperative, the human interface must be designed to optimize interaction. It is emphasized that a human interface in the broad definition, tele-existence in narrow definition, is essential to complement the semi-autonomous... View full abstract»

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  • Multi sensory system for the recovery of 3D structure; industrial applications

    Publication Year: 1994, Page(s):314 - 318
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (258 KB)

    The importance of 3D data acquisition is widely recognized in robotics field. One approach is to measure the distance on the basis of triangulation principle from the disparity of two images. This stereo method has a difficult problem of finding the correspondence of features between two images. This correspondence problem can be solved geometrically by adding one more camera (trinocular vision). ... View full abstract»

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  • MicroMMS: a compact abstract syntax for MMS

    Publication Year: 1994, Page(s):304 - 311
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (394 KB)

    MMS (Manufacturing Message Specification) was initially designed for interconnection of industrial devices in manufacturing and process control applications. MMS can also be applied to new areas such as building automation, field buses and remote meter reading. Such applications have much stronger constraints concerning the available processing power and memory. The use of an MMS specified in ASN.... View full abstract»

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  • Fault tolerance techniques integrating MMS and ISIS

    Publication Year: 1994, Page(s):297 - 303
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Fault tolerance and interoperability in a heterogeneous environment are two important concerns in distributed industrial applications. The manufacturing message specification (MMS) was designed to standardize and facilitate the remote control and monitoring of industrial devices made by different vendors. Software such as the ISIS Distributed Toolkit makes the task of providing fault tolerance eas... View full abstract»

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