基于自抗扰控制技术的鲁棒制导律设计

Robust Guidance Law Design Based on Active Disturbance Rejection Control

利用自抗扰控制技术,设计了一种对未知目标机动具有较强鲁棒性的制导律。运用扩张状态观测器对系统非线性部分、通道间耦合项以及目标机动加速度的总和进行估计,并实时给予动态补偿,实现了动态反馈线性化和解耦控制,然后设计了非线性反馈控制器。仿真结果表明,该制导律能有效抑制视线角速度的波动,保证导弹命中目标。

Based on the active disturbance rejection control, a robust guidance law for intercepting maneuver target with unknown acceleration was designed. By ESO, the total dynamics including internal nonlinear dynamics, coupling terms and unknown target acceleration was accurately estimated and dynamically compensated in feedback, by which dynamic feedback linearization and decoupling control was realized. Then, a nonlinear feedback controller was designed. The numerical simulation results show that the guidance law can effectively attenuate chattering of the line-of-sight rate and ensure guidance accuracy.