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Computer Integrated Manufacturing, 1988., International Conference on

Date 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
  • 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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  • Implementation of a distributed data management system for manufacturing applications-a feasibility study

    Publication Year: 1988, Page(s):19 - 28
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    A prototype implementation of a data management system primarily designed for technical applications is discussed. The system may be regarded as a superset of well-known data administration concepts like file systems and database systems, both centralized and distributed. The basic idea is to enrich the concept of consistency supported in a classical database system by a more flexible data distrib... View full abstract»

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  • An integrated analysis of flexible assembly systems

    Publication Year: 1988, Page(s):377 - 382
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    An attempt to define the requirements for a flexible automated assembly system is discussed. The system's flexibility is a structural characteristic that depends on the physical design of the system and the product. The author addresses three critical questions: (i) what is flexible assembly, (ii) what is design for assembly, and (iii) how is it possible to economically analyze assembly lines? The... 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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  • Production planning for a prone to failures manufacturing facility with stochastic demand

    Publication Year: 1988, Page(s):74 - 80
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The production planning of a manufacturing facility with uncertain capacity and stochastic demand is discussed. The plan is based on the hedging point policy as derived by S.B. Gershwin et al. (1985). The same policy is applied for a system that has stochastic demand and is prone to failures. The same policy can also be used to determine the size of the buffer for a system with two machines. Simul... 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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  • An integrated data model for CIM planning and control

    Publication Year: 1988, Page(s):338 - 342
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    After describing a database-centered planning environment, the article concentrates on issues involved in developing an integrated data model. These include (1) the data requirements for representing modern manufacturing systems, (2) the data requirements for a decision-making environment, and (3) the data requirements of the planning models themselves. By emphasizing information relationships, th... View full abstract»

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  • IGES and PDES, the current status of product data exchange standard

    Publication Year: 1988, Page(s):210 - 216
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Currently, IGES (Initial Graphic Exchange Specification) is the international standard for exchange product definition data between CAD (computer-aided design) systems. However, due to its efficiencies, a new standard is in the process of development and will gradually replace IGES. It is believed that PDES will be less error-prone than IGES. Its improvements include free-form format representatio... View full abstract»

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  • 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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  • Automated design of fixtures for FMS

    Publication Year: 1988, Page(s):201 - 207
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A system for the automated design of fixtures is under development at the University of Minnesota at Duluth and at the University of Birmingham, UK. This system is being developed on a microVAX and a GPX workstation using solid modeling CAD (computer-aided design) and a Lisp-based inference engine. The CAD-rulebase interface languages being used are Fortran and C. A structured set of rules has bee... View full abstract»

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  • Automatic construction of assembly partial-order graphs

    Publication Year: 1988, Page(s):383 - 392
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    A system is presented which automatically constructs an assembly partial-order graph from an object-oriented model describing parts and their connections. The construction is based on the principle of assembly by disassembly and on assembly heuristics representing criteria for preferred subassemblies. The system first identifies disassemblable parts and subassemblies by reasoning geometric and phy... View full abstract»

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  • Parallel machine scheduling using Lagrangian relaxation

    Publication Year: 1988, Page(s):244 - 248
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    A two-level optimization methodology is presented for scheduling independent jobs with due dates on parallel machines (resources). A Lagrangian relaxation technique is applied to a constrained integer programming formulation of the problem. A decomposition by job of the dual problem serves to simplify the solution at a low level. The high-level problem is then solved by a subgradient method. In ge... 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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  • 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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  • 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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  • Mare Island flexible manufacturing workstation

    Publication Year: 1988, Page(s):9 - 18
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The Mare Island flexible manufacturing workstation (MIFMW) is a fully automated flexible turning workstation being developed at the US National Bureau of Standards (NBS). It is designed to produce parts unattended, for extended periods of time. It has many capabilities and sophisticated features which include hierarchical control architecture, in-process gaging, tool setting, tool condition, monit... View full abstract»

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  • Production control implications for CIMS

    Publication Year: 1988, Page(s):343 - 349
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    The implications and importance of production control for CIM (computer-integrated manufacturing) are discussed. To better understand what these implications are, a list of twenty desirable attributes of computer integrated production planning and control (CIPP&C) systems are presented. The list is neither exhaustive nor mandatory. It is in a sense a wish list and it is unlikely that any one s... 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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  • A generalized calibration method for robots in manufacturing applications

    Publication Year: 1988, Page(s):266 - 272
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    A generalized method of robot calibration is presented. Using this method, the true values of the robot's joint and link parameters can be estimated, which would considerably improve the accuracy of current industrial robots and remove one of the major obstacles to the implementation of offline programming. This calibration method, unlike some previous techniques, is general in nature and applicat... View full abstract»

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  • The integration of manufacturing information systems

    Publication Year: 1988, Page(s):217 - 225
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    The status of computerization in industry is examined, using the results of a survey of European manufacturers. It is shown that some areas (e.g. inventory, design) are more computerized than are others, but that even where one firm has computerized multiple segments of its operation, the computer systems used are rarely integrated. Methods of integrating systems within and between businesses are ... View full abstract»

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  • The application of state-of-the-market CIM to GE's electrical distribution and control business

    Publication Year: 1988, Page(s):316 - 320
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    The application of innovative sheet-metal fabrication and automated assembly technologies in GE's ED&C production operations is reviewed. Specific attention focused is on the integration of workcell control systems, equipment productivity levels, and process-quality controls. The result of establishing integrated systems has permitted improved customer service from the initial proposition phas... 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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  • Distributed architecture for production planning and control in discrete manufacturing

    Publication Year: 1988, Page(s):357 - 366
    Cited by:  Papers (1)  |  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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