Fuzzy gain scheduling control to digital cabin pressure regulating system

Based on the cabin pressure regulating system characters of the nonlinear, larger inertia and time varying parameter, the arithmetic of fuzzy gain scheduling was proposed in this paper. The control parameters could be optimized globally using the controller based on the fuzzy gain scheduling because the fuzzy inference was used to change the parameters of the controller online to adapt the change of work point according to the output error and error change rate. When deciding the membership functions of proportion coefficient and integral coefficient, the system response will become better in the premises of system stable if the exponent function is introduced. The experiment results show that cabin pressure and pressure rate of change meet the needs of a certain type of aircraft environmental control system specifications, and the effectiveness of the new control strategy proposed in this paper is proved.