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为提高拦截机动目标的精度,基于滤波扩张状态观测器提出了一种考虑自动驾驶动态特性的有限时间收敛制导律。通过滤波扩张状态观测器对制导律中目标机动信息进行补偿,使导弹在拦截目标时具有更高的拦截精度。仿真结果表明,在目标机动情况下,设计的制导律能保证视线角速度在有限时间内收敛到零,拦截弹过载较小,具有较好的动态特性和鲁棒性。同时与普通的扩张观测器的估计结果相比,滤波扩张状态观测器对机动目标的跟踪效果较佳。
In order to improve the accuracy of intercepting maneuvering targets, a finite time convergence guidance law considering the dynamics of automatic driving is proposed based on the filter expansion state observer. By filtering the extended state observer, the target maneuvering information in the guidance law is compensated so that the missile has a higher interception accuracy when intercepting the target. The simulation results show that under the target maneuvering condition, the designed guidance law can ensure that the angular velocity of the line of sight converges to zero within a limited time, and the interception missile has a small overload and has good dynamic characteristics and robustness. At the same time, the filter expansion state observer has a better tracking effect on maneuvering targets than that of the ordinary expansion observer.