Incomparable Single Controller for Solving Deadlock Problems of Flexible Manufacturing Systems

A Deadlock Prevention Policy for Flexible Manufacturing Systems Using Siphons

In this paper, we present a new deadlock prevention algorithm for the class Petri nets. A new class of net that is extended from SPR, called ESPR where deadlocks are related to unmarked siphons. This method is an iterative approach by adding two kinds of control places called ordinary control place and weighted control place to the original model to prevent siphons from being unmarked. We have ...

Design Guidelines for Deadlock-Handling Strategies in Flexible Manufacturing Systems

Deadlock-free operation of flexible manufacturing systems (FMSs) is an important goal of manufacturing systems control research. In this work, we develop the criteria that real-time FMS deadlock-handling strategies must satisfy. These criteria are based on a digraph representation of the FMS state space. Control policies for deadlock-free operation are characterized as partitioning cuts on this...

Deadlock prevention in flexible manufacturing systems using symbolic model checking

Genetic Algorithms for Solving Scheduling Problems in Flexible Manufacturing Cells

In this paper, scheduling problems in Flexible Manufacturing Cells (FMC) are studied. The scheduling objective is to minimize the makespan. We used a genetic algorithm (GA) for solving the optimization scheduling problem. We have developed one FMC with industrial characteristics with the objective of studying scheduling problems in these types of manufacturing systems (single machine scheduling...

Deadlock prevention and deadlock avoidance in flexible manufacturing systems using Petri net models

Deadlocks constitute an important issue to he addressed in the design and operation of flexible manufacturing systems (FMS’s). In this paper, we show that prevention and avoidance of FMS deadlocks can he implemented using Petri net models. For deadlock prevention, we use the reachability graph of a Petri net model of the given FMS, whereas for deadlock avoidance, we propose a Petri net-based on...