Design and experimental evaluation of PID controller for digital electro-pneumatic cabin pressure control system

The performance of the designed digital electro-pneumatic cabin pressure control system for the cabin pressure schedule of transport aircraft is investigated. For the purpose of this study, an experimental setup consisting of a simulated hermetic cabin and altitude simulation chamber is configured for cabin pressure control system operation. A series of experimental tests are executed to evaluate the performance of the cabin pressure control system. The parameters of the PID controller are optimized. In the optimization process, the variation regularity of the rate of cabin pressure change under various conditions is considered. An approach to prioritize the control of the rate of change of cabin pressure based on the flight status model is proposed and verified experimentally. The experimental results indicate that the proposed approach can be adopted for the designed digital electro-pneumatic cabin pressure control system to obtain a better cabin pressure schedule and rate of cabin pressure change.