Signal Flow Graph Modeling of Linear Fuzzy PI Controller
نویسندگان
چکیده
A systematic procedure for developing the unified signal flow graph model of a fuzzy PI controller is presented in this paper. From this unified model it is possible to determine the complete behavior of the Fuzzy PI controller. As a first step in constructing the signal flow graph the analytical structures oflinear fuzzy PI controller are needed. In view of this by considering triangular/trapezoidal membership functions for input variables, singleton or triangular/trapezoidal membership functions for output, Zadeh fuzzy logic AND operator, Zadeh OR operator or Lukasiewicz fuzzy logic OR operation and linear defuzzifier. A fuzzy PI controller can be represented as a linear PI controller and piece-wise linear fuzzy PI controller. In these cases a systematic signal flow graph analysis is presented in this paper.
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