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以实现对空间非合作目标表面附着的同时保证与其相对速度为0(“零距零速”附着)为目标,首先规划了附着任务的燃料最优轨迹,推导了主动飞行器动力学模型中的最优性一阶必要条件,用间接法求解多约束下的燃料最优附着问题。然后,提出了用滑模变结构控制追踪燃料最优轨迹的“零距零速”附着控制方法,结合了燃料最优控制和滑模控制的优点,是一种近似燃料最优的反馈控制方法。仿真算例表明,该方法可有效克服初始误差和建模误差,同时实现近似燃料最优,具有一定的可行性和工程应用价值。
In order to achieve the target non-cooperative surface space while ensuring the relative speed of 0 ( “zero speed zero speed ” attachment) as the goal, first of all, planning the optimal trajectory of the attachment mission fuel derived active vehicle dynamics model The first order necessary conditions of optimality, the indirect method is used to solve the optimal fuel attachment problem under multiple constraints. Then, a new “zero speed zero speed” attachment control method based on sliding mode variable structure control for tracking the optimal trajectory of fuel is proposed, which combines the advantages of fuel optimal control and sliding mode control and is an approximate fuel optimal feedback Control Method. The simulation results show that this method can effectively overcome the initial error and modeling error, and achieve the optimal fuel, which has a certain feasibility and engineering application value.