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[Proceedings] 1988 International Conference on Computer Integrated Manufacturing

23-23 May 1988

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  • 1988 International Conference on Computer Integrated Manufacturing

    Publication Year: 1988
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    Freely Available from IEEE
  • New methods for tolerance analysis in solid modeling

    Publication Year: 1988, Page(s):306 - 314
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    Results are presented of research at IBM into the use of solid modeling technology for the automated solutions of tolerating problems. This work focuses on the tolerance analysis problem, and presents several methods for the automated solution of three-dimensional tolerance analysis problems, using solid modeling technology. A Monte Carlo method is presented for both worst-case and statistical tol... View full abstract»

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  • PRISM (PRoductivity Improvement Systems for Manufacturing)-a CIM integration at AT&T

    Publication Year: 1988, Page(s):2 - 8
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    PRISM, the manufacturing execution link of the overall CIM (computer-integrated manufacture) architecture at AT&T, is a family of computerized information systems supporting end-to-end shop floor operations. The work presents how PRISM supports the manufacturing operations, and describes the functionalities and architectures of the PRISM systems. PRISM supports the movement of materials from t... View full abstract»

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  • FRAFES, a frame-based feature extraction system

    Publication Year: 1988, Page(s):296 - 305
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    A prototype feature extraction system based on frame representation of part data and features is presented. A feature description language (FDL), based on semantic nets, is described. The objective of this approach is to provide an intelligent and flexible link between design and manufacturing. Finally, the system implementation and sample results are discussed View full abstract»

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  • Using Grafcet to design generic controllers

    Publication Year: 1988, Page(s):110 - 119
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    Ways in which Grafcet is being used to help design generic controllers within the US National Bureau of Standards' Automated Manufacturing Research Facility are outlined. Grafcet is a powerful graphic language for expressing control flow and allows the expression of both parallel and sequential control logic. The rationale is described for using Grafcet as a design tool for expressing software for... View full abstract»

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  • Animated sensitivity analysis for production planning

    Publication Year: 1988, Page(s):171 - 180
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    The use of advanced computer graphics technology for animated sensitivity analysis is discussed in the context of production planning. Animated sensitivity analysis allows users to make continuous `local' changes to the state of the system (e.g. the schedule) and simultaneously see appropriate (though not optimal) global changes. The concept is illustrated with two examples from production schedul... View full abstract»

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  • Mathematical techniques in solid modeling

    Publication Year: 1988, Page(s):290 - 295
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Basic computational problems in mathematics for solid modeling are discussed. It is shown how merging results from algebras, geometry, and approximation theory into effect tools can lead to a higher level of performance in solid modeling. Effective mathematical techniques are shown, such as singularity analysis and resolution, parameterization and implicitization, residue computation and Chinese r... View full abstract»

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  • Complete manufacturing control using a contract net: a simulation study

    Publication Year: 1988, Page(s):100 - 109
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    Contract nets, which use a bidding mechanism to solve problems, were first proposed as artificial intelligence constructs for distributed problem solving. They have recently been applied to distributed manufacturing control. The contract net presented, called a complete contract net, is intended to implement both high- and low-level control. The complete contract net incorporates mechanisms for ju... View full abstract»

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  • Simulation analysis applied to the design of a totally automated assembly system

    Publication Year: 1988, Page(s):368 - 376
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    Partial results are presented of a research project, geared toward developing an automated assembly system design proposal. The assembly system is intended for production of small copiers and similar products composed primarily of plastic parts small motors, and externally supplied electronic and mechanical components. The candidate systems designed are developed and simulation analysis is used to... View full abstract»

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  • Asynchronous parallel paint systems: sequencing and control issues in JIT environment

    Publication Year: 1988, Page(s):327 - 336
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    The asynchronous parallel painting of vehicles in modern vehicle assembly facilities provides the flexibility to handle variations in mix, quality, and equipment uptimes. However, this results in an unpredictable output sequence of vehicles leading to problems in material flow, especially in plants that use just-in-time (JIT) parts delivery. A flow model is developed that captures the relationship... View full abstract»

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  • Integration of design, planning, and manufacturing subsystems in sheet metal processing

    Publication Year: 1988, Page(s):138 - 143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The elements and integration are described of a prototype manufacturing system which achieves a fully automated link between all CIM (computer-integrated manufacturing) functions from design to machine output. A generative computer-aided process-planning module operates directly on CAD exchange files, supplying part process information to a master production compiler. The compiler, in turn, combin... View full abstract»

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  • A flexible interface between two-dimensional representation and three-dimensional representation

    Publication Year: 1988, Page(s):160 - 170
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    An approach is presented to reconstructing an object from its engineering drawing by recognizing the 2-D features on the drawing and using volume sweeping. Important features on the drawing like symmetry, ear, rib, hole pattern and cross section are recognized. Nonexact projections are removed first, then primitives are constructed by sweep volume according to the cross section. The final object i... View full abstract»

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  • Control of multiple robotic arms engaged in cooperative manipulation and assembly operations

    Publication Year: 1988, Page(s):282 - 287
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    An approach to the control of robots engaged in cooperative manipulation and assembly operations is presented. The techniques uses transducers to measure constraint reactions created in the resulting closed-chain multirobot configuration by relative trajectory errors between manipulators. A structural analysis formulation is then utilized to determine the magnitude of these errors, followed by act... View full abstract»

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  • A facility-level CIM system

    Publication Year: 1988, Page(s):253 - 263
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (980 KB)

    Application modules are identified that clearly lend themselves to an integrated information flow in a controlled manner: CAD (computer-aided design) and CAPP (computer-aided process planning) consist of the product and process design centers of the proposed system respectively. MRP II undertakes the management of production plants to satisfy the market demand. The functional design of the system ... View full abstract»

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  • Distributed architecture for production planning and control in discrete manufacturing

    Publication Year: 1988, Page(s):357 - 366
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The production management (PM) problems to be solved in a discrete manufacturing plant of large dimension are analyzed. Two separated approaches are discussed: the plant manager approach and the systems integrator approach. In the former, one states the PM objectives to be optimized; using the latter, one must suggest the mathematical formalizations of PM problems and the methods to solve them. A ... View full abstract»

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  • A computer integrated manufacturing cell for use in education and training

    Publication Year: 1988, Page(s):321 - 326
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A computer-integrated manufacturing (CIM) cell has been developed for use in colleges, universities, and industrial training centers. This CIM cell, complete with curriculum for the system and each of the five modules, can be used to teach the principles involved in implementing computer-integrated manufacturing in industry. One cell has already been installed for use in a classroom environment, b... View full abstract»

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  • Development and integration of a microcomputer based image analysis system for automatic PCB inspection

    Publication Year: 1988, Page(s):129 - 135
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Completely repeatable inspection of printed circuit boards (PCBs) requires that the inspection be automated. The cost of such inspection is beyond most medium to small PCB manufacturers. The authors address this problem with a microcomputer-based image-analysis system. Illumination, filtering, and flaw detection of the IBM-AT-based system are addressed. The authors conclude that when processing co... View full abstract»

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  • Part families selection for computer integrated manufacturing systems

    Publication Year: 1988, Page(s):194 - 200
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The problem of partitioning the part types produced by a flexible manufacturing system (FMS) is discussed. The system examined is designed to produce a set of part types, the number of which is too high to run simultaneously on the system. Constraints imposed by the specifications of the system, such as capacity of tool magazines, number of existing pallets and/or capacity of buffers are violated.... View full abstract»

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  • Spatial and temporal decomposition method in production management

    Publication Year: 1988, Page(s):153 - 158
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Some decomposition methods to split scheduling problems into smaller scheduling subproblems are discussed. Spatial decomposition methods consist of dividing the production system into subsystems that are as independent as possible. It is shown how to manage the remaining links between these subsystems. Temporal decomposition handles the problem with a decomposition along the time axes: part sets a... View full abstract»

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  • An online supervisor for robotic tasks

    Publication Year: 1988, Page(s):274 - 281
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    To increase task flexibility in a robotic assembly environment, a hierarchical planning and execution system is being developed which will map user-specified three-dimensional part assembly tasks into various target robotic workcells, and execute these tasks efficiently using manipulators and sensors available in the workcell. One level of this hierarchy, the supervisor, is responsible for assigni... View full abstract»

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  • Automated generation and evaluation of control programs for discrete manufacturing processes

    Publication Year: 1988, Page(s):92 - 99
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    A set of software tools is described for specifying the control and process dynamics for discrete manufacturing systems. Specifications are entered and modified in a relational database using a formalism that naturally reflects the functional components of a discrete control system. A Petri-net model of the control and process logic is extracted automatically from the database, and various analysi... View full abstract»

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  • A multilevel production control model for FMS with disturbances

    Publication Year: 1988, Page(s):81 - 84
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    A hierarchical flexible manufacturing system (FMS) is discussed. Three levels are considered-factory, section and machine-each level presenting a different stochastic optimization problem. The machines are universal. The rates of demand and the due dates are pregiven deterministically. Each machine processes parts with several possible speeds which are subject to disturbances. On the machine level... View full abstract»

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  • Integration of knowledge-based and algorithmic techniques for production scheduling

    Publication Year: 1988, Page(s):64 - 73
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    The integration of algorithmic and heuristic methods has been investigated in different manufacturing environments. The algorithmic procedures developed for production scheduling results were limited in their ability to cope with the complexity of real-world manufacturing. The scheduling problem, seen as a constraints-satisfaction problem, can be approached with knowledge based techniques. However... View full abstract»

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  • Intelligent decision support for manufacturing enterprise

    Publication Year: 1988, Page(s):44 - 52
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    A set of ongoing research activities at the Decision System Laboratory (DSL) at Stanford University is briefly described. These activities address the global issue of strategic integration from the technical point of view of developing intelligent decision support systems (IDSS) which support the management process in strategic integration. The approach is to break the global issue into three basi... View full abstract»

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  • An extended horizon scheduling algorithm for the job-shop problem

    Publication Year: 1988, Page(s):249 - 252
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A real-time scheduling algorithm for a flexible manufacturing system environment is described. This algorithm uses a schedule space search which is characterized by a heuristic-oriented approach based on simulation. The algorithm can be seen as a look-ahead dispatching rule, because the simulation-based search gives a forecast of how good a schedule can be, before choosing the best one. The algori... View full abstract»

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