Optimal scheduling and control of batch chemical processes with Petri nets
ZHOU Jia-zhong
LUO Ji-liang
ZHAN Yu-kun
Abstract：A method based on Petri nets is proposed to schedule and control a batch chemical system. First, an opera-tional process is modeled as a P-timed Petri net according to its recipe. Second, a net structure is introduced in the P-timed Petri net to model a valve according to the topological structure of a batch chemical system. Consequently, a controlled Petri net model is obtained for a batch chemical system. Finally, via the reachability tree of this controlled Petri net, a method is proposed to calculate an optimal control strategy that makes the processing time shortest. Further, a control matrix for valves is calculated based on the structure of the controlled Petri net. The proposed methods are illustrated by a typical batch system.
Keywords：Petri netsoptimal schedulingcontrolbatch chemical processesthe reachability tree
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 809-815 )