Abstract:As an important core component of the active control system of helicopter structure response (ACSR), the control performance of the centrifugal actuator system is directly related to the suppression effect. In this paper, a prototype of a centrifugal actuator driven by a permanent magnet brushless DC motor is developed. The system composition and working principle are described in detail, and the adjustment methods of the output force frequency, amplitude and phase of the actuator are discussed. The output force equation of the eccentric block is established based on the principle of the centrifugal actuator. The EC60 flat 411678 produced by MAXON is used as the motor drive source. The actuator servo control system is designed, and the key parameters such as isolation DC/DC, bootstrap diode, bootstrap capacitor, current drive capability and bus support capacitance in power drive are designed in detail. The experiments are carried out, the motor speed error is controlled within 1%, the position response time is less than 50mS, and the vibration is suppressed below 0.0015g. The developed system has achieved good control performance, which lays a foundation for the application of centrifugal actuator system in the helicopter platform.