This article designed a simulation actuation system using a brushless DC motor to drive the aircraft control surface, enabling it to deflect the control surface to a specified angle as needed. Firstly, the working principle of brushless DC motor was studied and a simulation model of a double closed-loop speed control system was established. Then, considering the multivariable, nonlinear, and strong coupling characteristics of brushless DC motor, fuzzy PID is introduced for controller design to achieve precise control of rudder surface deflection angle. Finally, the simulation results indicate that the system performance using fuzzy PID controllers has significantly improved compared to traditional PID controllers in terms of Transient Time, Overshoot and Steady-State Error, indicating the effectiveness and superiority of the designed system.