PID Parameter Tuning of Flight Atmospheric Parameter Test System Based on Policy Iteration

Aiming at the need for verification of airborne atmospheric data equipment, a flight atmospheric parameter test system based on policy iterative PID control is designed. The control parameters of the PID are tuned by the policy iteration algorithm. Firstly, the mathematical model of the pressure control system is established, which takes the sensor error and the air actuator error into account. Then, the policy iterative PID control is introduced, and the policy iterative PID control is used to decide the pressurization and depressurization according to the pressure error. Finally, compared with the classic PID simulation, it can be seen from the simulation results that the policy iterative PID control has a faster system response speed than the classic PID control. The policy iterative PID has more accurate in terms of accuracy, which can meet the needs of high-precision verification.