Criteria of Selecting Knowledge Base in the Fuzzy Controller of the Electrohydraulic Position Control System

摘要

Aim To analyse the influence of knowledge base on the performance of the fuzzy controller of the electrohydraulic position control system, and to determine their selection cri- teria. Methods Experiments based on different membership functions, scaling factors and con- trol rules were done separately. The experiment results and the influence of different know- ledge base on the control performance were analysed in theory so that criteria of selecting knowledge base can be summarized correctly. Results Knowledge base, including membership functions, scaling factors and control rules, has a crucial effect on the fuzzy control system. Suitably selected knowledge base can lead to good control performance of fuzzy control sys- tem.