Abstract:

The traditional integrated guidance and control method can’t ensure that the line-of-sight (LOS) satisfies the field-of-view angle constraint of the strap-down seeker. In view of this problem, a new integrated guidance and control method for a strap-down missile considering body field-of-view (FOV) angle constraints is proposed by combining the strap-down decoupling principle and state constraint control method in this paper. Firstly, the integrated guidance and control model considering the FOV constraint is built by employing the strap-down decoupling method, based on which the strict feedback state equation model is derived; secondly, a novel adaptive law for estimating the square of the disturbance bound is designed; thirdly, the FOV constraint issue is handled based on the integral Barrier Lyapunov function and the dynamic surface control. At last, the stability of the closed system and the uniform ultimately boundedness of the signals are proved by the Lyapunov theorem. The numerical simulations imply the effectiveness of the proposed method.

Key words:  Strap down seeker, State constraint, Barrier function, Disturbance adaptive, Integrated guidance and control