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

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,...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2017-07, Vol.32 (7), p.5752-5759
Main Authors: Zheng, Shiqiang, Li, Haitao, Han, Bangcheng, Yang, Jingyu
Format: Article
Language:English
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
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Summary: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.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2016.2608660