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Research on the controller of the digital cabin pressure regulating system based on the fuzzy gain scheduling

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 can be optimized globally using the controller based on the fuzzy gain scheduling because the fuzzy inference was used to changes 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 P and I, the system response will become better in the premises of system stable if the exponent function was introduced. The simulation 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 was proved.