Variable Universe Multiple-Fuzzifications Control

A novel method is being proposed for the design of the fuzzy logic controller (FLC) in order to improve the controlling precision. This paper describes the design and implementation of some FLCs based on the variable universe and the multiple-fuzzifications methods. They are different from conventional FLC´s design method. No complex algorithm is required to implement the controllers. The actual performance of the novel FLCs at controlling the water tank temperature were evaluated against the performance of an intelligent temperature controller. The experiment results show that the design of fuzzy controllers can not only be carried out simply and easily, but also can improve the control performance. The effective methods proposed are easily implementable on commonly used equipment such as PLC. Generally, the novel fuzzy controllers can both improve the performance of control system and cut down the cost of hardware.