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    题名: Controllability of weakly dependent siphons under elementary-siphon control
    作者: Chao, Daniel Yuh;Chen, Jiun-Ting;Huang, J.-S.
    趙玉;陳俊廷
    贡献者: 資管系
    关键词: Deadlock prevention;Dependent siphon;Elementary siphon;Linear inequalities;Linear integer programming;Redundancy elimination;Resource requirements;Sequential process;Integer programming;Petri nets;Siphons;Robotics
    日期: 2013
    上传时间: 2015-05-21 16:16:13 (UTC+8)
    摘要: Monitors are added upon problematic siphons to avoid deadlocks. Li and Zhou add monitors to elementary siphons only while controlling the rest dependent siphons to save cost. After failing a Marking Linear Inequality (MLI) test, they perform a Linear Integer Programming (LIP) test (NP-hard). We proposed a new MLI test earlier to avoid the LIP and extended it to S3PR2 (systems of simple sequential processes with general resource requirements) for strongly dependent siphons (SDS). The control policy for weakly dependent siphons (WDS) is rather conservative due to some negative terms in the MLI. This paper shows that WDS and SDS have the same controllability (i.e., MLI). As a result, the control for WDS needs no longer be that conservative. We also develop an optimization (by redundancy elimination) of the computation required for LIP test to ensure deadlock prevention of S3PR (Systems of Simple Sequential Processes with Resources). A favorable result for this policy is that any n-dependent (n>2) WDS (similar to SDS) needs no monitor and hence the complexity for synthesizing a controller becomes polynomial. © (2013) Trans Tech Publications, Switzerland.
    關聯: Applied Mechanics and Materials, 373-375, 1413-1427
    数据类型: article
    DOI 連結: http://dx.doi.org/10.4028/www.scientific.net/AMM.373-375.1413
    DOI: 10.4028/www.scientific.net/AMM.373-375.1413
    显示于类别:[資訊管理學系] 期刊論文

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