Controller Design of Short Take-Off/Vertical Landing Aircraft Based on PID and L1 Adaptive Control

Aiming at the problem that the parameters of Short Take-off and Vertical Landing vehicle (STOVL) with lift fan are coupling seriously and the control is difficult, the corresponding inner loop controller and control distribution strategy are designed. According to the structure of short takeoff and landing vehicle, the longitudinal dynamics model is established. Two control rings, height ring and attitude ring, were designed respectively, PID control method was used to design the outer ring control law, L1 adaptive control method was used to design the inner ring control law to compensate for various errors, PID control and Optimal torque distribution strategy were used to control the tail nozzle and lift fan in the inner ring of attitude ring. The simulation results show that the designed L1 adaptive controller is superior to the model reference adaptive controller in terms of performance, and the pull out simulation results show that the designed controller has good control performance and strong robustness.