Guidance algorithms for tactical missiles with strapdown seeker

Strapdown seekers have been recently adopted for short-range guided missiles to satisfy the demand for reducing the size and cost of guidance and control units. Since a strapdown seeker measures the look-angle only, rate gyros are additionally required for guidance command calculations. It is, however, well known that this kind of sensor combination inevitably includes a parasite loop which severely degrades the guidance performance. In this paper, we address how to design guidance algorithms to overcome problems due to the parasite loop. The performance of the proposed algorithms is investigated via numerical simulations for short-range tactical missiles.