Abstract
The results of a simulation based investigation of the step performance of fuzzy logic controlled proportional processes are presented. Conventional fuzzy logic control and a modified form, introducing the use of a proportional path in parallel with the fuzzy control output accumulator, are investigated. The controlled process was second order, with and without a time delay term. The phase advance provided by the modified controller clearly leads to a better step performance, especially when high order processes are controlled. Experimental results are presented showing that the modified controller provides a more robust performance with respect to variation of the parameters of the controlled process.
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