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为了研究地面试验环境下实现航天器捕获失控翻滚目标运动再现的姿轨控制问题,首先,建立了适用于实验验证的六自由度姿轨联合相似模型,可满足实验场地大小、机构速度和运行时间等约束;其次,基于多项式函数设计了有限时间收敛且动态性能良好的绕飞逼近参考轨迹,并利用反步法给出了姿轨联合控制律,证明了相似闭环系统的稳定性。通过仿真算例说明了基于运动再现的姿轨控制方法是有效的。
In order to study the attitude and trajectory control problem of spacecraft capturing uncontrolled rolling targets in ground test environment, a six-DOF joint and similarity model suitable for experimental verification was established to meet the requirements of experimental site size, mechanism speed and running time Secondly, based on the polynomial function, the reference trajectory of finite-time convergence and good dynamic performance around the fly is designed. The joint control law of attitude and trajectory is given by the backstepping method, and the stability of similar closed-loop system is proved. The simulation example shows that the attitude and track control method based on motion reproduction is effective.