纳卫星变轨段质量矩姿态控制系统设计

提出应用质量矩控制技术实现纳卫星轨道机动过程中的姿态稳定控制。在设计出质量矩滑块构型后,利用动量和动量矩定理推导了八自由度(DOF)动力学模型,并根据动力学分析结果建立了简化控制模型。以此为基础,基于全局滑模控制理论设计了俯仰偏航通道姿态稳定和滑块位置跟踪的鲁棒控制器,并在参数不确定性条件下对控制系统进行了仿真,结果表明:所设计的二维质量矩控制系统能快速控制卫星姿态,并对系统扰动具有较强的鲁棒性,可以应用于纳卫星变轨段的姿态控制。

Design of moving-mass attitude control system for nanosatellites in orbital transfer stage

A moving-mass control technology is proposed to stabilize the attitude of nanosatellites in orbital transfer stage.After the configuration of actuator masses is obtained,8 DOF dynamic equations are derived based on momentum and moment of momentum theorem.According to the results of dynamic analysis,a simplified control model is developed.On this basis,a robust controller characterized by a global sliding mode is given to stabilize the yaw and pitch angle and to track the actuator position.The validation of this control system is simulated with the condition of parametric uncertainty.Results indicate that the two-dimensional mass moment control system could rapidly adjust the attitude and have a good robustness against disturbance.It is concluded that this system can be applied for attitude control in orbital transfer.