敏捷卫星的联合执行机构控制策略

Abstract

Abstract: A control strategy integrating thrusters and flywheels as a hybrid actuator is presented for an earth observation agile satellite with large-angle rapid maneuver and high-precision control performance. This strategy seeks to take advantage of the strong points of each individual type of actuators: the thrusters will offer the primary reorientation maneuver torque in the form of feed-forward to make the spacecraft rotate rapidly, while the flywheels provide the fine control torque in the closed loop to evaluate the control precision. To compensate for the bias due to initial state mismatch and the coarse output torque of the thrusters, two attitude tracking controllers based on variable structure control are designed to enable the spacecraft to approach the reference trajectory asymptotically. The torque and speed saturation of the flywheels during maneuver is resolved accordingly. Simulation results show the feasibility and effectiveness of the proposed control strategy and the variable structure tracking control law.

Key words: attitude control, thruster, flywheel, variable structure control, time optimal, tracking control

CLC Number:

V448.2

YE Dong, SUN Zhaowei, WANG Jianying. Control Strategy of Hybrid Actuator for Agile Satellites[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, (6): 1108-1115.

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Control Strategy of Hybrid Actuator for Agile Satellites

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