增量比例导引的研究

比例导引规律相比于直接追踪法,跟踪精度有所提高,但是在目标机动性加大的情况下,传统比例导引规律控制精度仍不理想,而且指令加速度过载大。为此,在本文中提出一种增量比例导引方法,即保留传统比例导引规律基本比例形式不变,对视线角速度施以一增量后再比例导引。将该方法运用于不同运动轨迹目标的跟踪,证明该方法制导准确度提高,寻的时间短,实施简单。

Path planning via increment proportional navigation guidance with increment for intercepting targets

The proportional navigation(PN)guidance law is su pe rior to the straight-line path method, by reason that the straight-line path met hod is weak in dealing with the maneuvering motion targets. But to the intercept ing maneuverable targets,the guidance accuracy is bad by using the traditional p roportional navigation(TPN) guidance law .So based on the TPN guidance law,a n ew method is developed. This new method just is ·θm=K( ·q+ωδ).·θm=K·q is TPN la w. The ωδ called increment is the difference between t he two guidance la ws, so the new method is named proportional navigation with increment(I-PN)gui dance law. Simulation results indicate that ,for homing against maneuverable tar gets, the I-PN guidance law is better than the TPN guidance law in two respects: 1)guidance accuracy is higher, 2)interception time is shorter.