Analysis and design of servo system on multi-position north-seeker

In order to balance the veracity and the fast-speed of Multi-position north-seeker, the relation between the position-number and north-seeker error is analyzed. The double loop servo system is designed. The servo system applied the method of indexing localization, designed 90 positions on the round of the turntable, and used the integral separated PID control method. Each point adjusted position and speed of real time. The time of turning is less than 0.2s and position error is less than 5'. The designed system realized not only orient fast, but also non-overshoot. The result indicated that the servo system ensured the gyroscope's stability and validity of the measuring value. The system is the safeguard for the north-seeker getting high-precision results.