考虑高阶系统动力学滞后的最优制导律研究

Design of optimal guidance law with higher-order dynamic lags

通常研究制导律性能时多将制导系统和飞控系统等理想化为单位1或是一阶滞后动力学环节,但这与实际模型并不是十分匹配,导致常用的制导律(如增强型比例导引律和一阶最优制导律等)直接应用于高阶制导系统模型仿真时会产生较大的脱靶量。为了克服这一缺点,提出一种考虑典型五阶制导系统动力学特性的最优制导律,并给出该种制导律基于最优控制理论的详细推导过程。通过仿真分析表明,该高阶制导律可以实现对目标直接撞击,制导精度较高,所需侧向转移速度较小。

Usually guidance and control system is regarded as a zero or single-lag dynamic model, which does not completely match with the actual model, causing the common guidance laws （ such as augmented proportional guidance law and single-lag optimal guidance law） to produce large miss distance when they are directly applied to the higher-order model. In order to overcome this shortcoming, a detailed deriva- tion process of five-order optimal guidance law with optimal control theory is proposed. Through simula- tion analysis, it is cleared that this guidance law can achieve the goal of direct hit, higher guidance accu- racy and smaller lateral divert velocity.