Abstract: The MATLAB platform was used for modeling and simulation, the position loop/current loop double closed-loop proportional-integral-differential (PID) control system, and the combination of fuzzy control were used to solve the problem of the rotary direct drive valve (RDDV) of the aero-engine fuel regulation system. The servo system had hydraulic load disturbance, which seriously affected the dynamic characteristics and stability of the system. The simulation results show that under the same input conditions, the fuzzy double closed-loop control method can significantly shorten the response time under the premise of ensuring that the system has no overshoot, when there is a disturbance, the system can be restored to a steady state faster.

Key words: rotary direct drive valve, double closed-loop control, fuzzy control, aero-engine