Implementation of fuzzy system using hierarchical Colored Petri Nets to model flexible manufacturing cell

Abstract

In Flexible manufacturing field the Fuzzy application found in to solve conflict situation, production routing, and control in the system. In present days, to produce a product according to the Delivery dates is an important issue in Flexible Manufacturing industry. In order to focus on this issue, we try to solve this problem by implementing fuzzy rules according to due dates. The fuzzy rules are divided in three sections such as Early Due Dates (EDD), Exact Due Dates (EXACT), and Over Due Dates (OVER). In this flexible cell two other parameters are part processing time and the number of tools which are described in this fuzzy rules model. The part processing time and the number of tools are described with the small, medium and large linguistic variables. The fuzzy rule based model is constructed using Hierarchical Colored Petri Nets which is suitable to define each section as a sub model. The observed results provide the overall analysis and performance of cell. The constructed manufacturing cell model also provides the detailed behaviour of each resource where resource appears as Color token values. Also, we compare the simulation results from Hierarchical Fuzzy Colored Petri Nets and Matlab fuzzy rule based design for flexible cell.