针对导引头和自动驾驶仪动态延迟作用下拦截机动目标的高精度制导需求,设计了一种自抗扰制导律。建立了考虑导引头和驾驶仪动态特性的制导模型状态方程,其把目标加速度视为外界干扰。然后采用能够估计并补偿系统所受扰动的自抗扰控制设计制导律,其对制导部件动态延迟及目标机动具有较好的适应能力。最后,针对四种拦截情况分别采用自抗扰制导律和比例导引律进行了数学仿真,结果表明该自抗扰制导律具有更优的制导性能。

Aiming at the high-precision guidance requirement for the seeker and autopilot intercepting maneuvering target with the dynamic delay, a guidance law with active disturbance rejection control is designed. The state equation of guidance model based on the dynamic characteristics of seeker and autopilot is established. The target acceleration is regarded as external interference. And the guidance law with the active disturbance rejection control can estimate the interference and then compensate it. Thus, the guidance system has a good ability to adapt the dynamic delay of seeker and autopilot and the target maneuver. Finally, aiming at four kinds of intercept, the active disturbance rejection control guidance law and the proportional navigation guidance law are applied in simulation. The simulation results show that the active disturbance rejection control guidance law is of an advantage over the proportional navigation guidance law on guidance performance.