Title :
Hierarchical supervisory control for batch processes
Author_Institution :
Control Eng. Lab., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
A batch process involves a sequence of operations that are carried out on a discrete quantity of material within a piece of operating equipment. A recipe specifies the sequence of operations to be executed and all possible ways the plant can by utilized in order to produce the desired product. In this paper we divide the plant into two sub-systems: processors (units) and transporting system. A hierarchical supervisor is then constructed that solves the deadlock problem for each of these subsystems separately. Deadlock that can arise as a consequence of the combination of these two subsystems is taken care of by the way recipes are modeled. We start by briefly reviewing the plant and recipe models used. Next, we show the construction of a sub-supervisor for the transporting system and a plant supervisor
Keywords :
batch processing (industrial); hierarchical systems; materials handling; process control; batch processes; deadlock problem; hierarchical supervisory control; process control; recipe models; transporting system; Control engineering; Explosions; Inductors; Joining materials; Modular construction; Petri nets; State-space methods; Supervisory control; System recovery; Valves;
Conference_Titel :
Decision and Control, 1997., Proceedings of the 36th IEEE Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4187-2
DOI :
10.1109/CDC.1997.657626