Supervisor Synthesis for Enforcing a Disjunction of GMECs on Controlled Petri Nets

2007 ◽  
Author(s):  
Jiliang Luo ◽  
Shouguang Wang
Keyword(s):  
Petri Nets ◽  
Supervisor Synthesis

Petri Net Supervisory Method for Linear Constraints and its Applications to Flexible Manufacturing Systems

2013 ◽  
pp. 20-35
Author(s):  
Jiliang Luo
Keyword(s):  
Petri Nets ◽  
Petri Net ◽  
Flexible Manufacturing ◽  
Flexible Manufacturing Systems ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Flexible Manufacturing System ◽  
Linear Constraints ◽  
Supervisor Synthesis ◽  
Synthesis Procedure

An algorithm is proposed to equivalently transform original linear constraints on Petri nets, where the uncontrollable subnets are forward-concurrent free nets, into admissible ones. Consequently, this algorithm can be used to design both efficient and optimal supervisors for enforcing linear constraints on Petri nets since the problem on how to enforce admissible constraints has been well solved. Further, the supervisor synthesis procedure is presented using this algorithm. Lastly, it is illustrated by an example where an optimal supervisor is designed for a flexible manufacturing system.

scholarly journals An Efficient Siphon-Based Deadlock Prevention Policy for a Class of Generalized Petri Nets

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
YiFan Hou ◽  
Mi Zhao ◽  
Ding Liu ◽  
Liang Hong
Keyword(s):  
Petri Nets ◽  
Flexible Manufacturing ◽  
Flexible Manufacturing Systems ◽  
Manufacturing Systems ◽  
Synthesis Method ◽  
Deadlock Avoidance ◽  
Deadlock Prevention ◽  
Prevention Policy ◽  
Supervisor Synthesis ◽  
Resource Allocation Systems

We propose a new deadlock prevention policy for an important class of resource allocation systems (RASs) that appear in the modeling of flexible manufacturing systems (FMSs). The model of this class in terms of generalized Petri nets is, namely, S4PR. On the basis of recent structural analysis results related to the elementary siphons in generalized Petri nets on one hand and an efficient deadlock avoidance policy proposed for the class of conjunctive/disjunctive (C/D) RASs on the other hand, we show how one can generate monitors to be added to a net system such that all its strict minimal siphons aremax′-controlled and no insufficiently marked siphon is generated. Thereby, a new, simple, and more permissive liveness-enforcing supervisor synthesis method for S4PR is established.

Sign in / Sign up

Export Citation Format

Share Document