Extension of structured Petri nets for the control of a conveyor system

• Published in: Fifth International Conference on FACTORY 2000 - The Technology Exploitation Process pp. 472 - 477
• Main Authors: Stanton, M.J, Arnold, W.F
• Format: Conference Proceeding
• Language: English
• Published: London IEE 1997
• Subjects: Applied sciences; Combinatorial mathematics; Computer science; control theory; systems; Continuous conveyors: mechanical, hydraulic, pneumatic, etc; Control applications to materials handling; Control engineering computing; Control theory. Systems; Exact sciences and technology; Material handling, hoisting. Storage. Packaging; Materials handling and distribution; Materials handling equipment; Process control. Computer integrated manufacturing; conveyors; fault diagnosis; Petri nets; closed loop conveyor; scheduling systems; conveyor system control; monitoring; closed loop systems; workstations; structured Petri nets; fault monitoring; manufacturing control structure; manufacturing information systems; Computer integrated manufacturing; Conveyor; Process control; Monitoring; Defect detection; Petri net
• ISBN: 0852966822; 9780852966822
• ISSN: 0537-9989
• DOI: 10.1049/cp:19970185

This paper describes the extension of a manufacturing control structure for the control of a closed loop conveyor which delivers parts and raw materials to a number of workstations. The control structure is based on ordinary Petri nets which have been extended to allow the addition of external inputs and outputs. These nets are designed as modules which can be linked, via condition signals, to form the control structure of more complex systems. The possibilities of further expansion of the control structure to include scheduling systems and manufacturing information systems is also described. Finally the proposed application of such controllers to fault monitoring and diagnosis is discussed.