A New Engineering Method for Fuzzy Reliability Analysis of Surge Detection and Isolation in Centrifugal Compressor

A new dual fuzzy controller for the nonlinear model of the compression system is proposed in this paper. The surge phenomenon in the centrifugal compressor, the non-linearities and uncertainties of the compression system make it impossible to use a conventional controller over a wide range of operation. This fuzzy controller is designed to consist of a active surge control and phase control without any explicit system models, but driven in the human thinking mechanism. A simulation example of compression system is given to demonstrate the validity of the proposed control scheme. It is shown that the fuzzy controller can be simplified, and good tracking control performance can be achieved by choosing appropriate fuzzy roles. However, the dual fuzzy controller can successfully intervene in the control surge of the compression system. This new fuzzy control methodology suggested in this work reproduced well the main characteristics of the turbo compressor dynamic model developed by Moore and Gretzer and give place to a more precise and easy to handle representation. It is about a inaccuracies reproducing with a certain degree of satisfaction of the real process without being as much complex.