Power Consumption Reduction for Magnetic Bearing Systems During Torque Output of Control Moment Gyros

• Published in: IEEE transactions on power electronics Vol. 32; no. 7; pp. 5752 - 5759
• Main Authors: Zheng, Shiqiang, Li, Haitao, Han, Bangcheng, Yang, Jingyu
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.07.2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Active magnetic bearing (AMB); Actuators; Coils; control moment gyro (CMG); Degrees of freedom; dynamic regulator; Dynamic response; Dynamic stability; Feedforward neural networks; Force; Integrals; Magnetic bearings; Magnetic levitation; Permanent magnets; Power consumption; Power demand; Reduction; Rotors; Space vehicles; Spacecraft; Spacecraft attitude control; Torque
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2016.2608660

The power consumption of actuators is an important concern for the spacecraft attitude control system. This paper presents a power consumption reduction method for permanent magnet biased active magnetic bearings (AMBs) during torque output of control moment gyros (CMGs). For simplicity of analysis, a simple single degree-of-freedom (DOF) AMB system undergoing an external load force is first presented. An operating point adaptive regulation based on current-integral feedforward method is proposed to realize the coil current reduction with a reference position offset. Then the proposed method is extended to the case of the 4-DOF AMB-rotor system. In order to improve the dynamic response of the current-integral output, a dynamic regulator is incorporated into the feedforward loop. The parameter range for stability and dynamic properties of the AMB-rotor system with and without using the dynamic regulator have also be compared and discussed. Finally, experimental results on a developed magnetically suspended double-gimbal CMG prototype validate the effectiveness of the proposed method.