Missile Airborne Phased Array Seeker Data Processing And Terminal Guidance Scheme

Seeker, guidance law and control system are the key technologies of the precision strike weapons. As one of the most forefront and complex radar seeker in the world, phased array radar seeker creates a new field in the development of seeker institutional. This dissertation did researches on target identification, data processing and adaptation guidance methods for phased array radar seeker on a guided projectile. It provides a theoretical method for the study of guided projectile under the phased array radar seeker system and lays a solid foundation for engineering applications.Firstly, considering the symmetric aerodynamic shape and gliding movement of controlled ballistic characteristics for the gliding extended-range terminal guidance projectile with canards configuration. This dissertation defined the relevant coordinate system, made the force analysis and built a dynamic model of gliding extended-range terminal guidance projectile, and the simulation analyzed ballistic characteristics of the gliding extended-range terminal guidance projectile.Secondly, taking the adaptability of projectile flying complex environment for phased array active radar seeker, only the angle measurement information is available into consideration, the study proposes a phased array active radar seeker adaptive extended Kalman filtering algorithm based on the theory of conventional Kalman filtering. After comparison the datas, we find that the method of data processing for phased array radar seeker has good results.Based on the sight angle and sight angular rate parameters which obtained by phased array active radar seeker, considering the influence of gravity during the glide guided bombs flighting, we use over gravity compensation to improve proportional guidance law to achieve precision strike the target of gliding extended-range terminal guidance. Data analysis of the proportion coefficient and over Gravity compensation parameters has effect on terminal Trajectory parameters for guided projectile, the results show that improvements over the gravity compensation proportional guidance law can improve extended-range efficiency and combat accuracy of the gliding extended-range terminal guidance projectile.