The optimization of aircraft bay door control method

Abstract

Aircraft bay door system is of variable heavy load torque and requirement of instantaneous high flow. These characteristics complicate the manufacturing process and limits the adjustment of closed-loop parameters. It also increases the difficulty of system design and system test. In addition, local pressure closed-loop characteristic is coupled with long pipeline and unstable oil supply, which causes underdamped pressure closed-loop control. This paper builds bay door hydraulic system model including variable oil supply model to analyze the reason why the traditional PID control method is not fit for the bay door system, and decide to utilize the Fuzzy PID control method to optimize the very bay door system. Then, the Fuzzy PID controller is designed and given. Simulation based on aircraft bay door movement command are carried out to verify the Fuzzy PID control performance of the system. This method needs position signal of the bay door detected by position sensor. Using this method, better closed loop features are achieved, and control algorithm is used commonly. Software simulation comparisons between Fuzzy PID control method and traditional PID control method are also included to show advantages of using Fuzzy PID. The results prove the feasibility and advantage of using modern intelligent control method.