By Topic

Computer Integrated Manufacturing and Automation Technology, 1994., Proceedings of the Fourth International Conference on

Date 10-12 Oct. 1994

Filter Results

Displaying Results 1 - 25 of 69
  • Proceedings of the Fourth International Conference on Computer Integrated Manufacturing and Automation Technology

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (46 KB)
    Freely Available from IEEE
  • Modeling of sensor-based robotic task plans using fuzzy Petri nets

    Publication Year: 1994, Page(s):73 - 80
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    This paper proposes a fuzzy Petri net (FPN) model of sensor-based execution of robotic task plans. A fuzzy Petri net consists of three types of fuzzy variables: local fuzzy variables, fuzzy marking variables, and global fuzzy variables, which are used to model object attributes, system states, and degrees of completion of global tasks. An executable fuzzy Petri net, a subnet of the FPN for sequenc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hierarchical production planning with part, spatial and time aggregation

    Publication Year: 1994, Page(s):430 - 435
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A hierarchical approach to planning production in complex manufacturing systems is presented. A single facility containing a number of work-centers that produce multiple part types is considered. The planning horizon includes a sequence of time periods, and the demand for all part types is assumed to be known. The production planning problem consists of minimizing the holding costs for the work-in... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • R-TICS: a real-time infrastructure for control systems

    Publication Year: 1994, Page(s):358 - 363
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    This paper describes the design and implementation of R-TICS (Real-Time Infrastructure for Control Systems). R-TICS enables the rapid development and modification of periodic and event-driven real-time control systems. Built on top of the RT Mach operating system, R-TICS takes care of the low-level details such as data acquisition, inter-task communication, memory management, and task scheduling. ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A hybrid scheduling algorithm for multiclass production systems with setup times

    Publication Year: 1994, Page(s):279 - 284
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Proposes a hybrid algorithm for scheduling non-preemptive, single operation jobs in a multiclass production environment. The objective is to minimize the sum of the total weighted tardiness and setup costs of the schedule. The authors believe the problem is NP hard, and use an efficient suboptimal algorithm based on Lagrangian relaxation and simulated annealing. The authors' algorithm works well f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer aided performance analysis of Petri net synthesis methods for automated manufacturing systems

    Publication Year: 1994, Page(s):81 - 86
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    An application of a computer aided tool, called the Petri Net Synthesis Tool (PNST), for performance analysis and comparison of Petri net synthesis methods for automated manufacturing systems is presented. Three synthesis theories for manufacturing are experimented. The performance data generated by the tool show that the structure-based method by Krogh and Beck (1986) and the behavior-based techn... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic capacity allocation in manufacturing systems with significant setup times

    Publication Year: 1994, Page(s):436 - 442
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Considers setup scheduling as one level of decision making in a hierarchical control approach for manufacturing systems. From a flow control model used in the hierarchy, production targets are determined which are to be tracked in the setup level using a “corridor policy”. The authors' results show that simple linear corridor policies can possibly lead to a chaotic behavior for product... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Enterprise information management for global manufacturers

    Publication Year: 1994, Page(s):364 - 371
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    New information technologies such as distributed computing systems and the National Information Infrastructure have brought the integration for global enterprises closer to being a reality. These technologies and standards alone, however, are not sufficient to effect scalability, adaptability, and usability of integrated enterprise information systems, without which the integration can collapse of... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A new algorithm for form tolerance evaluation

    Publication Year: 1994, Page(s):286 - 291
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    A new algorithm for form tolerance evaluation has been developed. Evaluation of the minimum tolerance zone is formulated as an optimization problem following the definitions of geometric tolerances in the current ANSI standards. The algorithm utilizes the experimental optimization techniques and the combinatorial nature of orthogonal arrays to plan the experimentation and evaluate the minimum tole... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fuzzy Petri nets to model and control output quality from a flexible manufacturing cell

    Publication Year: 1994, Page(s):87 - 92
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The paper demonstrates how a Petri net based on a hierarchical structure block diagram can be used to model and control all the activities within an flexible manufacturing cell (FMC). Next by utilising fuzzy Petri nets, a technique based on 9 fuzzy rules is developed. The tool speed (s) and the feed rate (r) throughout the milling operation are used to determine surface finish (f'). It also illust... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Developing a class of sequential function charts from Petri nets

    Publication Year: 1994, Page(s):163 - 168
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    A fundamental problem in specifying control software is that the interaction of inputs and outputs becomes difficult to tract as the size of the control problem grows. This has led to a great deal of interest in graphical programming languages (GPL), such as the sequential function chart (SFC) or the GRAFCET approach to program documentation. These languages are based on Petri nets. In this paper ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A receding horizon strategy for the hierarchical control of manufacturing systems

    Publication Year: 1994, Page(s):443 - 450
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    This paper concerns the development of a hierarchical framework for the planning and scheduling of a class of manufacturing systems. In this framework, dynamic optimization plays an important role in order to define control strategies that, by taking into account the dynamic nature of these systems, minimize customized cost functionals subject to state and control constraints. The proposed archite... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The integration of simulation and reality for education enhancement and training

    Publication Year: 1994, Page(s):372 - 377
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Quite often, when engineers are exposed to a manufacturing environment on the job for the first time, they undergo a baptism by fire. The environment forces them to deal with situations that integrate many different bodies of knowledge. Reliance on concepts acquired in the academic environment is crucial to their success. Unfortunately, lacking in most academic environments, is any experience thro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance models for communication networks in manufacturing environment

    Publication Year: 1994, Page(s):417 - 422
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The performance analysis of computer communication networks for manufacturing automation has been investigated by a number of researchers. Many analytical and simulation models have been proposed. Basically, one can classify these models as queueing models, queueing network models, simulation models and Petri net models. In this paper, an overview of various models and a Petri net method for model... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automatic synthesis algorithms for supervisory controllers

    Publication Year: 1994, Page(s):151 - 156
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Describes the authors' experience with a prototype system capable of synthesizing supervisor controller programs based largely on the theory of discrete event systems (DES) first proposed by Ramadge and Wonham (1987). The authors augment the theory by also allowing continuous time trajectories modeling transitions between events. The authors illustrate their approach by an example, the discrete co... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Holonic control of a water cooling system for a steel rod mill

    Publication Year: 1994, Page(s):134 - 141
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (924 KB)

    As part of the intelligent manufacturing systems feasibility study on holonic manufacturing systems, a benchmark study whose objective was to develop an architecture of a holonic cooling control system for a steel rod rolling mill is described. The resulting architecture was simulated to illustrate benefits that could be obtained with the holonic system compared with a conventional system. A gener... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Future R&D directions for CIM deployment

    Publication Year: 1994, Page(s):208 - 211
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The manufacturing world is always in mutation, at this time shifting from economy of scale to globalization and customer satisfaction leading to economy of scope. While this enforces the need for more integration, it has severe implications on the deployment of computer integrated manufacturing (CIM) in manufacturing enterprises. The paper reviews some CIM technical issues requiring further resear... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Compensating probe radius in free surface modeling with CMM

    Publication Year: 1994, Page(s):222 - 227
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    In surface measurement system using a touch probe, probe radius compensation is a key to accuracy. In this paper, the authors investigate methods for compensating probe radius so that the surface equation for an unknown free-surface can be efficiently derived. The algorithm developed derives a surface equation by an iterative procedure consisting of: a) estimation, b) verification, and c) modifica... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A new algorithm for discrete tolerance optimization

    Publication Year: 1994, Page(s):292 - 297
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A new algorithm has been developed which deals with the problem of least cost tolerance allocation with process selection. This algorithm uses the combinatorial nature of orthogonal arrays and experimental optimization techniques to allocate the magnitude of tolerance to each design dimension and select the corresponding manufacturing process. Interaction graphs are used to assign the dimensional ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic Petri nets and their applications

    Publication Year: 1994, Page(s):93 - 98
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    In this paper a modeling tool based on Petri nets is introduced. This tool is a generalization of the classical Petri nets. It introduces the idea of having a dynamic structure. The structure of the net (i.e. the incidence matrix) can be changed dynamically via external control. A systematic study is done to give the conditions required to keep the initial properties of the net even in presence of... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic analysis of supervisory controllers: a timed Petri net approach

    Publication Year: 1994, Page(s):169 - 176
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    In this study, we consider a system with two processes (A,B) sharing a single resource. Through out the study we assume that each box consists of a single transition, and processes A and B work in a cyclic manner according to the temporal constraints. An ordinary timed Petri net is introduced, which demonstrates both conflicts and concurrency. The objective of this study is to describe the dynamic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Product development on the information superhighway or staying out of the electronic breakdown lane

    Publication Year: 1994, Page(s):455 - 458
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    Increasing maturity of the mathematical models used to develop part geometries, and emerging standardization of computing platforms and information exchange, have made extensive sharing of electronic data between design, development, and downstream tasks possible for the first time. For a broad range of engineering products, it is likely that this exchange will profoundly reduce development cycle ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The controllability and supremal controllable sublanguage of Petri net languages

    Publication Year: 1994, Page(s):236 - 241
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    In this paper we discuss the controllability problem of Petri net languages and obtain the necessary and sufficient condition for it. Then we present a method for synthesizing a feedback controller by which the closed loop system generates the supremal controllable sublanguage of a given Petri net language, and two examples are given for illustration View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Tolerance analysis for assembly planning

    Publication Year: 1994, Page(s):306 - 311
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    The specification of tolerances is an integral part of product design since tolerance directly affects the functionality, manufacturability, and cost-effectiveness of the product. However, it is not clear whether the given tolerance specification will allow assembling the product successfully. Therefore, the tolerance analysis can play an importance role in assembly planning. Assembly planners in ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An object oriented graphical tool for creating and editing Petri nets

    Publication Year: 1994, Page(s):254 - 259
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    This paper presents an object oriented graphical tool for creating and editing Petri nets in a graphical form and for translating these nets into a textual form for analysis and simulation purposes. The tool is called Netman. Its architecture, functionality and application are discussed and a simple example of its use is presented. This paper illustrates the ability to create a net and evaluate a ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.