论文部分内容阅读
本文采用辨识技术来建立飞行器的等效线性动态模型。所得的等效线性动态模型可描述飞行器在给定某段弹道上的动态特性。在辨识过程中采用了改进的牛顿—拉普森算法及对辨识参数初值的特殊处理,使迭代过程收敛加快且对初值不敏感。在进行飞行器控制系统计算机辅助设计时,由于等效线性动态模型和原始非线性动态模型很好地近似,致使按等效线性动态模型设计的控制规律能很好地适用于原始非线性动态模型。文中最后给出飞行器在最优控制下的飞行弹道仿真曲线.
In this paper, identification technology is used to establish the equivalent linear dynamic model of the aircraft. The resulting equivalent linear dynamic model describes the dynamics of the aircraft over a given trajectory. In the process of identification, the improved Newton-Laplace algorithm and the special treatment of the initial value of the identification parameters are adopted to make the iterative process converge faster and insensitive to the initial value. In the computer-aided design of the aircraft control system, the equivalent linear dynamic model and the original nonlinear dynamic model are well approximated, so that the control law designed by the equivalent linear dynamic model can be well applied to the original nonlinear dynamic model. Finally, the flight trajectory simulation curve of the aircraft under the optimal control is given.