Implementation of an expert system for control system design

Abstract

This paper describes the development of an expert system in a computer- aided control system package called SFPACK. SFPACK has evolved from the MATLAB-derived control environment to a new generation of control system design environment because of the novel knowledge environment developed within the package. Expert systems can be developed within SFPACK and it provides an integrated environment for numeric and symbolic processing. An implementation of an expert system based on the classical frequency response design method will be described. The design knowledge of the design techniques is represented as rules, facts and objects. The expert system was developed to represent the design expertise, heuristics and informal trial- and-error procedures to meet the design specifications. The design process consists of a sequence of operations obtained by heuristics and experience in the design techniques.