为了解决两个航天器在近距离导引段相对动力学方程的非线性因素,本文引进结构不确定性概念,将建模过程中所忽略的因素作为不确定性,同时将近距离导引段两个航天器的相对运动描述为模型跟踪问题,借助于线性不确定系统的鲁棒模型跟踪问题解决了两个航天器近距离导引段的最优交会问题。 In order to solve the nonlinear factors of the relative dynamics equations of the two spacecraft at the short-range guidance section, this paper introduces the concept of structural uncertainty and takes the neglected factors in the modeling process as the uncertainties. At the same time, The spacecraft’s relative motion is described as a model tracking problem, and the optimal intersection problem of the two spacecraft guided range segments is solved by means of the robust model tracking problem of linear uncertain systems.