基于扰动观测器的导引头隔离度抑制方法研究

干扰力矩引起的平台导引头隔离度不仅会影响导引头输出精度，还会增加导弹制导系统脱靶量。针对隔离度对导弹制导精度带来的严重问题，设计了基于扰动观测器（DOB）的隔离度在线抑制算法，并分别研究了导引头建模误差、探测器输出频率以及测量噪声对隔离度抑制效果的影响。研究结果表明：基于DOB的隔离度抑制算法能够有效实现对隔离度的在线抑制，但导引头建模误差、探测器输出频率以及测量噪声会一定程度降低隔离度的抑制效果。

A Disturbance Observer-based Inhibition Method for Disturbance Rejection Rate of Seeker

The disturbance rejection rate (DRR) of seeker has the effect on the output accuracy of seeker and the guidance performance.An online inhibition method based on disturbance observer is proposed for the problems of the guidance precision of missile caused by DRR. The errors of seeker models, the output frequency of detector and the effect of measurement noise on DRR inhibition are presented. The result shows that the spring torque and the damping torque are the main factors of the DRR generation, and the missile guidance precision would be reduced. The online inhibition method based on disturbance observer can inhibit DRR effectively; but the errors of seeker models, the output frequency of the detector and the measurement noise reduce the inhibition effects to some extent.