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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。
Guidance law and flight control system are usually idealized into unit 1 or first-order hysteresis dynamics when studying the performance of guidance law, but this does not fit well with the actual model and leads to the common guidance law (such as enhanced proportional guidance Law and the first-order optimal guidance law, etc.) directly applied to high-level guidance system model simulation will have a greater miss distance. To overcome this shortcoming, an optimal guidance law considering the dynamics of a typical fifth-order guidance system is proposed. The detailed derivation of the guidance law based on the optimal control theory is given. The simulation analysis shows that the high-order guidance law can achieve the direct impact on the target, the guidance accuracy is high, and the required lateral transfer speed is small.