Abstract
This paper proposes a fuzzy PI tuning scheme for multivariable process system where the process consists interactions among loops. First, a static decoupler is implemented and each loop is assigned with a fuzzy PI controller. Two types of FPI configurations are considered. FPI tuning is formulated using two-level tuning principle shown in [1]. The low-level tuning is accomplished using a novel linear tuning scheme, where as high-level tuning is achieved while changing rule base parameters in the fuzzy output. A nonlinearity tuning diagram is developed for nonlinear tuning. The proposed design method is less complex and can be applied for any n x n MIMO system. The performance of the proposed controller is evaluated using control simulations.
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