Application of Fuzzy Petri Net Simulation for Integrated Environmental Control of Production Networks

Abstract

In the first paragraph of our paper we discuss the balancing of input and output streams of production systems. Methodologically this can be based on input-output models (e.g. unit operation models) or simulation systems. According to the requirements for the modelling of real production systems (e.g. simultaneous modelling of structure and state of the production system, availability to describe analytical and synthetical production structures, the possibility to model different aggregation levels) the Petri net approach seems to be adequate to meet these requirements. In order to validate this approach, we examine in the second part an exemplary production system from the textile industry, consisting of a dye house, a hydro power plant, a boiler house, and a flue gas neutralization facility. As an extension we propose the integration of decentralized control strategies concerning economical and ecological goal functions. In accordance with the structure of the available expert knowledge. (fuzzy knowledge) a fuzzy Petri net approach for integrated environmental control of interconnected production systems is discussed in the fourth paragraph. The fith part focuses on the problem solving mechanisms of this approach. To illustrate the mechanism a simplified sub-system of the described example will be considered.