A Three-Dimensional Robust Nonlinear Guidance Law Considering Dynamics of Missile Autopilot*

Considering the autopilot dynamics, on the basis of the backstepping method and input-to-state stability theory, a novel three-dimensional nonlinear guidance law is proposed for intercepting a maneuvering target. Without any information of target motion, the guidance law can exhibit good performance in suppressing the disturbance from target escape maneuvering. The stability analysis as well as the simulation results shows that our scheme has strong robustness with respect to target maneuvers and bounded disturbances in the control loop.