为了提高飞行器再入制导的鲁棒性和自适应性,将再入弹道跟踪问题转化为再入弹道状态调节问题,得到了一个LTV系统最优控制问题。在此基础上,利用基于伪谱算法的最优反馈控制算法,设计了一种便于在线实现的自适应鲁棒再入制导律。仿真结果表明,这种再入制导律对于再入点误差不敏感,具有良好的鲁棒性。在气动参数模型存在较大误差的情况下,依然能够取得较高的再入制导精度。它不需要显示增益调度和积分,并且在不同情况下控制结构和参数无需改变。 In order to improve the robustness and adaptability of aircraft reentry guidance, the problem of reentry ballistic tracking is transformed into the problem of reentry ballistic state adjustment. An optimal LTV system control problem is obtained. On the basis of this, an adaptive robust reentry guidance law is designed to realize on-line realization by using the optimal feedback control algorithm based on pseudospectral algorithm. The simulation results show that this reentry guidance law is insensitive to the error of reentry point and has good robustness. In the case of large error in the aerodynamic parameter model, the precision of reentry guidance can still be obtained. It does not need to show the gain scheduling and integration, and in different situations without changing the control structure and parameters.