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基于解耦变结构控制对静止轨道气象卫星扫描镜运动对卫星姿态的影响进行了研究,根据星上有效载荷的扫描镜与星体耦合特性,设计了一种解耦变结构控制律,控制律直接对4个四元数设计滑动模态方程以避免奇异问题。数学仿真结果表明:该变结构控制率能减小扫描镜运动对卫星姿态的影响,提高卫星平台的稳定度,进而提高有效载荷的成像质量。
Based on the decoupled variable structure control, the influence of the orbit meteorological satellite scanning mirror on the attitude of the satellite is studied. According to the coupling characteristics between the scanning mirror and the stars on the payload of the satellite, a decoupled variable structure control law is designed. The control law is directly Design sliding mode equations for 4 quaternions to avoid singularities. The results of mathematical simulation show that the variable structure control rate can reduce the influence of the scanning mirror movement on the attitude of the satellite and improve the stability of the satellite platform so as to improve the imaging quality of the payload.