Design of Guidance Laws with Falling Angle Constraint and Coupling of Seeker Dynamics

Abstract

Aiming at the problems of the dynamic coupling between the guided rocket projectile body and the seeker, a guidance law design method with falling angle constraint is proposed. Firstly, considering the coupling effect between the seeker and the projectile body during flight, the two-degree-of-freedom mathematical model of azimuth-pitch strapdown seeker and the six-degree-of-freedom mathematical model of guided rocket are established. Then, considering the dynamic coupling factor between the seeker and the projectile body in practical engineering applications, the deflection angle of the seeker frame is used as the guidance information, and a guidance law with falling angle constraints is designed to achieve the maximum damage effect. Finally, the simulation analysis verifies that the designed guidance law with falling angle constraint can reduce the miss distance while ensuring the falling angle accuracy.

Keywords

• |guided rocket|azimuth-pitch strapdown seeker|falling angle constraint|proportional guidance law|dynamics lag