基于扩张状态观测器的自抗扰滑模导引律

Active disturbance rejection sliding-mode guidance law based on extended state observer

考虑零脱靶量落角约束问题,针对大机动目标,提出一种自抗扰模糊滑模导引律,采用Lyapunov稳定性判据证明其稳定性。通过扩张状态观测器实时估计目标机动,并在自适应神经模糊滑模导引律中进行补偿,提高导引律对大机动目标的导引性能。考虑实际情况的量测噪声,引入一阶低通滤波器,并重新设计带滤波器的扩张状态观测器,通过滤波方程补偿,消除滤波器带来的观测误差。研究结果表明:所设计导引律能够实现对大机动目标的落角约束打击,对于噪声干扰具有良好的鲁棒性。

In view of the problem of zero miss distance and impact angle constraints for great maneuver targets, an active disturbance rejection fuzzy-sliding mode control guidance law was presented, and Lyapunov stability criterion was adopted to prove the stability. Extended state observer was adopted to estimate the target maneuvering online, and compensation was carried out in adaptive neuro-fuzzy sliding mode control guidance law to improve the guidance performance for great maneuver targets. Considering the measurement noise, a low-pass filter was introduced and extended state observer with filters was redesigned to eliminate the observation error of the filter by means of filter equation compensation. Research results indicate that the designed guidance law can realize impact angle constraint attach for great maneuver targets and has good robustness for noise interference.