滚仰式捷联导引头具有很好的应用前景,但在过顶跟踪时提取稳定的视线角速度问题一直没有妥善的解决方法.提出一种利用导引头提供的失调角、框架角及框架角速度等信息构建“虚拟偏仰式导引头”的方法,设计Kalman滤波器对目标垂直视线运动信息进行估计,进而间接提取出视线角速度信息,用于产生制导指令.仿真结果表明,在过顶跟踪时该方法能有效抑制视线角速度抖动,视线角速度精度显著提高.

Roll-pitch strap-down seeker has good application prospect.However,the problem of extracting LOS (Line-of-Sight) rate steadily during zenith pass tracking has not been properly solved.We proposed an approach for constructing a virtual “pitch-yaw” seeker by using the seekers angular position error,gimbal angles and gimbal angle rates.A Kalman filter was also designed whose input is the measurement of the virtual seeker to estimate movement information of the target.And the LOS rate could be extracted indirectly.Simulation results show that the proposed method can restrain the dithering of the LOS rate efficiently during zenith pass tracking and improve the precision of LOS estimation.