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    政大機構典藏 > 商學院 > 資訊管理學系 > 期刊論文 >  Item 140.119/65331


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    题名: A New Optimal Control Policy for A Well-Known S3PR (systems of simple sequential processes with resources
    作者: Chao, Daniel Yuh
    趙玉
    贡献者: 資管系
    关键词: deadlocks, flexible manufacturing, FMS control, manufacturing control systems, Petri nets, recovery
    日期: 2011.08
    上传时间: 2014-04-14 11:29:05 (UTC+8)
    摘要: There are many studies reported in the literature comparing the effectiveness of new control policies by testing them against a well-known S3PR (systems of simple sequential processes with resources) model. We propose a new approach that recovers the system from empty-siphon states to former live states. It therefore attains the same number of states as the original uncontrolled model by adding monitors (and control arcs) similar to the prevention approach. There is no need to perform a reachability analysis. INA (integrated net analyser) analysis indicates that the resulting controlled model is live and reaches all 26,750 states (in the uncontrolled model), more than the maximally permissive 21,581 states. Only seven monitors are employed, fewer than in most other approaches. This arises from the fact that no new problematic siphons are generated due to the added monitors. We discuss the disadvantages (a variant of the scheme to overcome the disadvantages is also discussed) and physical meaning of the policy. We further propose a lossless approach by colouring some arcs. This not only avoids material loss, but also tackles the livelock problem.
    關聯: International Journal of Production Research,50(22), 6259-6271
    数据类型: article
    DOI 連結: http://dx.doi.org/10.1080/00207543.2011.623725
    DOI: 10.1080/00207543.2011.623725
    显示于类别:[資訊管理學系] 期刊論文

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