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提出了一种在缺少绝对轨道信息时航天器椭圆轨道自主交会的鲁棒参数化设计方法.利用带有时变参数的Lawden方程描述椭圆轨道下追踪航天器与目标航天器的相对运动关系.在假设时变参数无法获得的情况下,将方程中的时变参数单独归类建立椭圆交会的不确定模型,然后基于鲁棒参数化方法,采用特征结构配置和模型参考跟踪理论设计航天器椭圆轨道自主交会的鲁棒控制律.本文所设计的鲁棒控制律是一个不随时变参数变化的定常反馈控制律,结构简单,便于工程实现.仿真结果表明,在只有相对运动信息的情况下,所设计的控制律能够实现椭圆轨道下航天器的自主交会.
A robust parametric design method of the autonomous orbital intersection of spacecraft elliptical orbit is proposed in the absence of absolute orbit information.The Lawden equation with time-varying parameters is used to describe the relative motion of the tracking spacecraft and the target spacecraft under elliptical orbit Under the circumstance that the time-varying parameters can not be obtained, the time-varying parameters in the equations are singularly classified to establish the uncertain model of the elliptic intersection. Then based on the robust parameterization method, the elliptical orbit autonomy of the spacecraft is designed using the feature configuration and the model reference tracking theory The robust control law of intersection.The robust control law designed in this paper is a constant feedback control law that does not change with time varying parameters and has a simple structure and is easy for engineering implementation.The simulation results show that under the condition of only relative motion information, The control law enables the autonomous intersection of spacecraft under elliptical orbit.