Tracking principle for roll-pitch seeker

The tracking principle of roll-pitch seeker well-suited for short-range combat air-to-air missile was researched. According to the target angular coordinates on detector, geometry of roll-pitch seeker and its location relative to the missile, the modeling of tracking gimbal angles error signals were derived to realize the close loop control of the roll-pitch seeker. And combined with the control characteristic of roll-pitch seeker, the control system of roll-pitch seeker was designed. For the actual application, the simplified modeling of tracking gimbal angles error signals was proposed. The difference was that the pitch loop control system constructed by the simplified modeling was slower than the precision one' s. Sequentially the effect of the simplified modeling could be compensated by optimizing bandwidth ratio of pitch and roll loop. The analysis results indicate that the simplified modeling can be adopted in actual application.