由于滚仰式导引头的结构特殊性,制导控制系统需要的视线角速率信息是不能够直接测量得到的,因此提出了一种基于跟踪微分器的视线角速率提取方法.根据滚仰式导引头的结构特点,分析了滚仰式导引头的运动学原理,并根据滚仰式导引头的结构推导出视线角与弹体姿态角、框架角和失调角的关系,然后设计了有限时间收敛跟踪微分器求解视线角速率信息.经数字仿真,对比了直接差分法和跟踪微分器法对视线角速率的提取效果,证明了利用跟踪微分器提取视线角速率的有效性.

A new solution of LOS Rate Estimation based on tracking-differentiator was proposed in this paper because LOS Rate information couldn't be attained for the structure particularity of Roll-pitch Seeker.The kinematics was analyzed,also was the relationship between LOS angle and missile attitude angle,gimbal angle,misalignment angle according to the structure particularity of Roll-pitch Seeker.And then,a tracking differentiator was designed for LOS Rate Extraction.The simulation results show that the LOS Rate Extraction based on tracking-differentiator performs better than direct difference method,which proves that the LOS Rate Extraction based on tracking-differentiator is very effective.