基于自抗扰控制的导引律

考虑目标机动和驾驶仪动态等情况，提出了一种基于自抗扰控制理论和反步法设计思想的新型制导律。将目标机动和驾驶仪参数不确定分别当成系统的扰动。将包含驾驶仪动态特性的制导环路，分作外环和内环分别进行控制器设计。外环自抗扰控制器用于控制切向相对速度收敛到零。抑制目标机动及系统非线性项对视线稳定性影响。内环自抗扰控制器用于跟踪外环输出的虚拟控制，补偿驾驶仪动态及驾驶仪参数不确定性对于制导精度的影响。仿真结果表明，设计的算法能够有效地实现制导目的，在目标作大机动且考虑驾驶仪动态情况下，仍然具有很高的制导精度。

The Guidance Law Based on Active Disturbance Rejection Control

Considering the guidance problem in cases of target maneuvers and the autopilot dynamics,a novel guidance law based on the theory of active disturbance rejection control and back-stepping method is presented.The target maneuver and the uncertainties of the autopilot are regarded as disturbance.According to the idea of back-stepping control,the guidance loop which includes the autopilot dynamics can be divided into an outer loop and an inner one.The active disturbance rejection controller of the outer loop is designed to control the relative velocity along normal direction converge to zero,it can restrain the influences of the target’s maneuver and system nonlinear term on the stability of the line of sight.The guidance law is designed to make the missile acceleration track the virtual control given by the outer loop.Then,the influence on the guidance performance due to the autopilot dynamics can be restrained.Simulation results show that the algorithm presented in the paper can achieve the goal of guidance effectively,and has a better performance as well in the case of target highly maneuvers and the autopilot dynamics are considering.