Research on Roll-pitch Infrared Seeker LOS Rate Extraction
HUA Wen-tao;LIU Kai;DING Hai-shan;Airborne Missile Academy;
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.