Strapdown optical seeker characteristics and multi-dimension optimal guidance law

In order to realize strapdown optical imaging seeker and guidance system integrated design, strapdown guidance and control system were established. According to the characteristics of strapdown seeker, guidance and control principle were studied. The models of strapdown seeker and gyro were established. For the problem of strapdown seeker can't extract the line-of-sight angular rate precisely, the control and guidance scheme of combining of attitude autopilot and LOS integral proportional navigation was proposed, and the relationship between body line of sight(BLOS), scale factor, navigation ratio and system stability region were analyzed. In order to improve system response speed, strapdown guidance system optimal guidance law was deduced. In the end, flight simulation were done, and the results show that strapdown guidance and control systems can attack on stationary and moving(60 km/h) targets effectively. The maximum firing errors were 1.49 m and 2.62 m respectively. System errors, gyro bias and bias stability play a very important part in the guidance system accuracy. Strapdown seeker guidance and control systems can meet the requirements of air-to-ground system for attacking stationary and low speed moving target.