Three-Dimensional Robust Nonlinear Guidance Laws Against Maneuvering Target

The three-dimensional relative motion model of missile and target,the robust nonlinear guidance laws are derived based on the idea of zeroing normal speed of LOS(line of sight)and the theory of input-to-state stability(ISS),without the linearization assumption.The design of the guidance law does not need to adaptively estimate the target acceleration.Without any information of target motion,the guidance law can exhibit good performance in suppressing the disturbance from target escape maneuvering.And it achieves tracking and the interception of the maneuvering target.The simulation results show that the guidance law possesses strong robustness property and good tracking performance with respect to the maneuvering targets.