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针对大力矩飞轮前馈和闭环反馈补偿复杂、对精度影响敏感性大的问题,提出了基于磁浮控制力矩陀螺闭环补偿的大型遥感卫星高精度姿态控制方法。该方法采用磁悬浮力矩陀螺为控制执行机构,通过变结构反馈补偿控制律设计,建立新的运动补偿控制系统,减小相机和卫星本体耦合效应。基于磁浮力矩陀螺力矩大、反向激励扰动小、精度高的特性,将其应用于对地遥感成像相机运动补偿控制系统中,仿真结果表明,与飞轮前馈补偿相比,姿态稳定度提高了一个数量级,有效提高空间大惯量卫星姿态控制的稳定度,提升相机对地成像质量;研究结果可为甚高精度卫星姿态控制与载荷运动补偿提供参考。
In order to solve the problem that the flywheel feedforward and closed-loop feedback compensation are complex and the sensitivity to the influence of precision is high, a high-precision attitude control method based on closed-loop compensation of moment control gyroscope for large remote sensing satellite is proposed. The method uses a magnetic levitation moment gyroscope as a control actuator, and designs a new motion compensation control system through variable structure feedback compensation control law to reduce the coupling effect between the camera and the satellite body. Based on the characteristics of large moment of magnetic floating moment gyroscope, small disturbance excitation and high precision, this method is applied to the motion compensation control system of the remote sensing imaging camera. The simulation results show that the attitude stability is improved compared with the flywheel feedforward compensation An order of magnitude, which effectively improves the stability of space attitude control of large inertia satellite and enhances the imaging quality of the camera to the ground. The research results can provide reference for attitude control and load motion compensation of very high precision satellite.