NECESSARY AND SUFFICIENT CONDITIONS FOR DEADLOCKS IN FLEXIBLE MANUFACTURING SYSTEMS BASED ON A DIGRAPH MODELFlexible manufacturing systemsdeadlock avoidancedeadlock preventionpetri netdigraphAs typical discrete event systems, flexible manufacturing systems have been extensively studied in such aspects as modeling...
On Necessary and Sufficient Conditions for Deadlock-Free Routing in Wormhole Networks 喜欢 0 阅读量: 39 作者:Verbeek,Freek,Schmaltz,Julien 摘要: Wormholewitching is popularwitchingechnique in interconnection networks.hisechnique islso proneo deadlocks.daptiveoutinglgorithms providelternative pathshatan...
This is called deadlock. This paper presents the sufficient conditions for deadlock to exist in a FMS; it models a FMS using digraphs to calculate slack, knot, order and space; it identifies three types of circuits that are fundamental in determining if a FMS is in deadlock....
Many deadlock control policies for flexible manufacturing systems (FMS) modelled by Petri nets are implemented via siphon control. Most of the existing methods design liveness-enforcing supervisors by adding control places for siphons based on their controllability conditions. To compute a liveness-...
A successful solution to deadlock prevention is to constrain the routing function such that it does not introduce any deadlock. Many necessary and sufficient conditions for deadlock-free routing have been proposed. The definition and the proof of these conditions are complex and error-prone. These...
Secondly, the sufficient and necessary conditions were presented to realize deadlock-free scheduling. By defining the maximal setting boundary for deadlock-free scheduling, a net-structure-based algorithm for resolution was proposed, as long as the initial marking of the Petri net was not greater ...
Secondly, the sufficient and necessary conditions were presented to realize deadlock-free scheduling. By defining the maximal setting boundary for deadlock-free scheduling, a net-structure-based algorithm for resolution was proposed, as long as the initial marking of the Petri net was not greater ...
If deadlock occurs, the automaton does not arrive at the goal at all. To overcome this drawback, we address a sufficient condition for designing a family of deadlock-free sensor-based path-planning algorithms in an uncertain world. Within this family, the automaton basically goes straight to ...