SGCMG高速转子无位置传感器控制

Sensorless Control Strategy for SGCMG High Speed Rotor

采用无位置传感器控制的单框架控制力矩陀螺(SGCMG)高速转子系统可以降低整机复杂度,提高整机可靠性。文章设计了适用于半桥驱动无刷直流电机的反电势位置检测方法和干扰去除方法,无需滤波电路,位置检测精度高。在开环起动阶段,提出了适用于大惯量比负载的"预定位—恒流升频起动—转速估计起动—切换"的四段式起动方法,提高了起动过程的可靠性。通过仿真和试验验证了方法的有效性,实现了SGCMG无位置传感器高速转子系统的高可靠起动和高精度控制。

Sensorless control strategy for rotor system of the single gimbal control moment gyro （SGCMG） could reduce complexity and promote reliability of the whole set. The methods based on the back electromotive force （EMF） detection of the half-bridge drive brushless DC motor （BLDC） and the disturbance eliminating methods without lowpass filter were proposed, which could achieves high detection precision. For the startup process, a four segment strategy was proposed including orientation segment, I/f startup segment, speed estimation startup segment and switch segment, which realized a reliable startup process. Simulations and experiments prove the effectiveness of the proposed method. Reliable and accurate sensorless system for SGCMG high speed rotor is realized.