A discrete and continuous systems simulator: applications of PNTBLSIM to manufacturing systems

Gsim: a Discrete Simulator for Manufacturing Based on Activities and Systems Interaction

In this paper we present a new methodology for modelling manufacturing discrete systems. The main contribution is to cleary differenciate the system and the activity that it performs. Such difference allows to create relationships between them, wich are essential for the model formulation. Through the proposed methodology we aim to developed an easy to use simulation tool for modelling the most...

A Microcomputer-Based Simulator for Digital Control Systems

A microcomputer-based simulator for digital control systems is proposed. The proposed simulator is a hybrid system in which the plant is simulated by conventional method of analog computers and other parts of the system including generation of input signal is performed digitally, using a Z-80 based microcomputer. To overcome the difficulty of programming in assembly language, and at the same ti...

A Statecharts Approach to the Modelling of Discrete Manufacturing Systems

The paper shows a novel approach to the modelling of the production cells of discrete manufacturing by asynchronous version of a statecharts formalism. For the proposed model, the functional speciication of the model based on the speciication language of temporal logic is presented. The speciied behaviours are translated into the syntax of statecharts as guarded constraints on the transitions r...

Decentralized prognosis of fuzzy discrete-event systems

This paper gives a decentralized approach to the problem of failure prognosis in the framework of fuzzy discrete event systems (FDES). A notion of co-predictability is formalized for decentralized prognosis of FDESs, where several local agents with fuzzy observability rather than crisp observability are used in the prognosis task. An FDES is said to be co-predictable if each faulty event can be...

Discrete-time Equivalents to Continuous-time Systems