Contents 1 Introduction
Modern war has put forward higher requirements for tactical missiles to be low-cost, miniaturized and modularized. The research on strapdown seeker has become one of the hottest technologies. With the maturity of the detector manufacturing technology and image guidance technology, the application of the strapdown infrared imaging seeker to tactical missiles has a long-term development prospect. Compared with the platform seeker, the strapdown seeker eliminates the mechanical rotation structure, and the infrared imager is directly connected to the missile, thus reducing the cost and volume of the seeker, and the tracking speed of the seeker is no longer affected by the friction torque and mechanical constraints. Although the strapdown seeker increases the instantaneous field of view, it reduces the tracking accuracy and detection range of the seeker, and increases the measurement error of the strapdown seeker [1]–[3]. In addition, the strapdown seeker also needs to use the detector and inertial navigation information to isolate the missile disturbance using a mathematical platform. The measurement error, scale and dynamics inconsistency between inertial navigation system and detector will lead to the DRR problem [4]–[5]. These problems increase the difficulty of using the strapdown seeker.
