Lopez-Mellado, E., and Alami, R., "A Failure Recovery Scheme for Assembly Workcells", IEEE Int. Conf. on Robotics and Automation , May 1990, pp. 702--707.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....[138] Lipton, R. J. Reduction: A Method of Proving Properties of Parallel Programs , Jour. of. Assn. Comp. Mach. No. 3, 1981. 139] Lirov, Y. Melamed, B. and Morris, R. J. T. Combined Control and Diagnosis for Complex Processes: An Intelligent Control Approach , Springer Verlag, 1993. [140] Lopez Mellado, E. and Alami, R. A Failure Recovery Scheme for Assembly Workcells , IEEE Int. Conf. on Robotics and Automation , May 1990, pp. 702 707. 141] Lou, X. C. and et al. Failure Detection with Uncertain Models , Proceedings of the 1985 American Control Conference, 1985, pp. ....

....mechanisms for soft failures. Section four deals with hard failures in a system concentrating on redundancy measures to incorporate fault tolerance. Section five deals with system deadlocks, their effects and how they are analyzed using PNs . B.1. Failure Classification Flexibility and autonomy [140] are two important system characteristics. Flexibility is related to the ability to adapt to new applications, and may involve re configuration of components and reprogramming. Autonomy refers to the ability of the system to make decisions according to external asynchronous events (asynchronous ....

Lopez-Mellado, E., and Alami, R., "A Failure Recovery Scheme for Assembly Workcells", IEEE Int. Conf. on Robotics and Automation , May 1990, pp. 702--707.

....leads to a better defined EPN system model. The subnet structural properties and the overall system properties are preserved. The Stochastic Petri Net Package (SPNP) is used for simulation studies. I. Introduction Flexibility, autonomy and reliability are important system characteristics [4]. The mean time between failures (MTBF) or the failure rate within a system represent suitable single reliability measurements [15] A (potential) system failure may be classified in general as external (due to factors external to the system) or internal failure (directly associated with the ....

Lopez-Mellado, E., Alami, R., "A Failure Recovery Scheme for Assembly Workcells", IEEE Intl' Conference on Robotics and Automation, pp. 702--707, May 13--18, 1990.

....SET(1,#) OF failure source; apply: exception handling plan; to confirm: OPTIONAL SET(1,#) OF failure source; to exclude: OPTIONAL SET(1,#) OF failure source; END ENTITY; Attachment of sensor activities to each combination of robot activity and failure is a common approach. L pez Mellado et al. [11] presented for instance a robot in work cell, characterised by a set of sites. Such a site could contain objects. In the case of exception, the robot detects for instance against its expectation no object on a site, a collection of test on the occupancy of different sites is performed. The rules ....

López-Mellado, E. and R. Alami "A failure recovery scheme for assembly workcells" Proceedings of IEEE conference on robotics and automation 1990

....will often fail due to the complexity and unpredictability of the environment. An unexpected, high priority order may arrive at the job shop or a piece of equipment used to process orders may break down. Existing methods to deal with this problem include real time recovery from plan failures [1] [2] [7] and post hoc plan repair based on failures observed while executing the plan [6] Failure recovery mechanisms, such as replanning, can be expensive, and it may not be feasible to repair a plan by letting it repeatedly fail. An alternative strategy is to monitor the execution of the plan, ....

Lopez-Mellado, Ernesto and Alami, Rachid. A failure recovery scheme for assembly workcells. In Proceedings of the IEEE International Conference on Robotics and Automation, volume 1, pages 702-707, 1990.

....research is supported by ARPA AFOSR contract F30602 91 C 0076. 1 Introduction Plans formulated to run in the real world will often fail due to the complexity and unpredictability of the environment. Existing methods to deal with this problem include real time recovery from plan failures [1] [2] [7] and post hoc plan repair based on failures observed while executing the plan [5] Failure recovery mechanisms, such as replanning, can be expensive, and it may not be feasible to repair a plan by letting it repeatedly fail. An alternative strategy is to monitor the execution of the plan, ....

Lopez-Mellado, Ernesto and Alami, Rachid. A failure recovery scheme for assembly workcells. In Proceedings of the IEEE International Conference on Robotics and Automation, volume 1, pages 702-707, 1990.

....by ARPA Rome Laboratory under contract #F30602 91 C 0076. 1 Introduction Plans formulated to run in the real world will often fail due to the complexity and unpredictability of the environment. Existing methods to deal with this problem include real time recovery from plan failures [1] [3] [12] and post hoc plan repair based on failures observed while executing the plan [9] Failure recovery mechanisms, such as replanning, can be expensive, and it may not be feasible to repair a plan by letting it repeatedly fail. An alternative strategy is to monitor the execution of the plan, ....

Lopez-Mellado, E. and Alami, R. A failure recovery scheme for assembly workcells. In Proceedings of the IEEE International Conference on Robotics and Automation, volume 1, pages 702-707, 1990.

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López-Mellado, E., R. Alami (1990). A Failure Recovery Scheme for Assembly Workcells, 1990 IEEE Int. Conf. on Robotics and Automation, Cincinnati.

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