Simulation of Aircraft cabin pressure control based on Fuzzy-PID

摘要

When an aircraft flying at high altitude changes altitude, atmospheric pressure will change. As high-altitude atmospheric is much different from ground atmospheric daily adapted, this change can make physical condition of the crew and passengers abnormal, even be risk for their life. Therefore, Aircraft cabin pressure must vary with altitude and the appropriate pressure rate is necessary in order to ensure the safety of crew and passengers and make them comfortable for the cabin pressure and its changing rate. Contrary to cabin pressure control law of modern large civil aircraft in this paper, pressure control system model is established and a Fuzzy PID algorithm is designed to control the cabin pressure model according to nonlinear characteristics of system model. Lastly, aircraft cabin pressure control system is verified by Matlab simulation software for a complete flight. The results of simulation illustrate that the model and the algorithm have good control effect and can meet the precision requirements of cabin pressure control.