Abstract:

The control moment gyros (CMG) are high-output-torque inertial actuators with torque amplifying capability and are usually used in the attitude control systems of large spacecrafts.In recent years, with the progress of some related techniques, the demands for CMG-based middle and small satellite platforms with high maneuver capability are rapidly increasing, and the CMGs are expected to output torques with not only high magnitude but also high accuracy.In consideration of the engineering practice, this paper proposes a method for measuring the accuracy of CMG gimbal angular rate.Also, a rotor magnetic flux oriented vector control method incorporating a friction torque observer and the corresponding compensation algorithm is proposed to control a sinusoidal permanent magnetic synchronous motor (PMSM) for driving the CMG gimbal.In the control loop, the stability and the dynamic performance of the CMG gimbal drive system can be improved effectively by compensating for the friction torque.

Key words: font-family:Calibri, sans-serif, ">color:windowtext, control moment gyro (CMG) ">control moment gyro (CMG) sfield=kw&, skey=control%20moment%20gyro%20(CMG)%20, torque%20accuracy, gimbal%20rate%20stability, vector%20control, friction%20torque&, code=&, ')">uid=WEEvREcwSlJHSldTTEYzVDhUQ01wZWNBc3JTenlNbHhvcDE3MXFEZWxwQT0=$9A4hF_YAuvQ5obgVAqNKPCYcEjKensW4IQMovwHtwkF4VYPoHbKxJw!!" target="https://kns.cnki.net/KXReader/_blank">, torque accuracy, gimbal rate stability, vector control, friction torque, ')">">