PETRI-NET BASED APPROACHES TO FLEXIBLE MANUFACTURING SYSTEMS

Abstract

This paper describes the planning process in flexi ble manufacturing systems. Flexible manufacturing s ystem consisting of machines, computers, robots and automated guided vehicle. The skeleton and the functiona lity of a Petri Net Toolbox, embedded in the MATLAB environment, are briefly presented, as offering a collection of in struments devoted to simulation, analysis and synthesis of di screte event systems. The integration with the MATLAB (1) philosophy responds to the general interest manifes ted by educators for enlarging the compatibility be tween the traditional background of Control Engineering appli cations and the novelty of discrete-event-systems s cenarios. It explains a scheme of labelling and firing which makes modelling convenient for complex systems whose constraints are difficult to express only in terms of firing duration. The system manufacture choose is from the undertake S.C. APULUM S.A. Alba Iulia. Timed Petri nets are used to model operational and routing flexibility in production systems. A genera lized multi-productive machine module is defined, adapted to system feature, repeated and connected to compo se the TPN models of production systems with different levels of routing and operation flexibility.