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飞行器轨迹优化的直接数值解法综述 总被引:5,自引:0,他引:5
系统归纳分析了目前用于飞行器轨迹优化的直接数值解法,对直接法的两大步骤:离散变换和非线性规划进行了分类讨论,介绍了直接打靶法、配置法和微分包含法各自的基本原理及优缺点,简述了直接法的应用。 相似文献
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A nonlinear terrain following(TF) and terrain avoidance(TA) controller is proposed for missile control systems. Based on classical TF algorithm (adaptive angle method), a new method for TF controller is proposed by using angle of attack. A method of obtaining terrain outline data from digital elevation map (DEM) for TF control is discussed in order to save store space. A TA algorithm is proposed by using bank-to-turn technique. The block control model, which is suitable for backstepping design, is given for nonlinear model of missile. Making full use of the characteristics of the system and combining block control principle and backstepping technique, a robust controller design method is proposed. Uncertainties in every sub-block are allowed, and can be canceled by using the idea of nonlinear damping. It is proved that the state tracking errors are converged to a neighborhood of the origin exponentially. Finally, nonlinear six-degree-of-freedom simulation results for the missile model are presented to demonstrate the effectiveness of the proposed control law. 相似文献