Guidance law with angle constraint used to intercept maneuvering targets

A continuous finite-time stabilization guidance law with terminal impact angle constrained is presented in this paper, which can be used to intercept the non-maneuvering and maneuvering target. Firstly, an adaptive super-twisted algorithm is designed based on the super-twisted algorithm, which can effectively alleviate the chattering, through using the adaptive parameters. A finite-time stabilization disturbance compensator is designed based on the adaptive super-twisted algorithm and the integrated sliding surface. Secondly, the geometric homogeneous theory is employed to design the finite-time stabilization controller for the compensated nominal system. The controller, composited by above disturbance observer and the geometric homogeneous theory controller, can ensure the system's finite time convergence. In addition, the composite controller is continuous and the parameters are adaptive, which can effective suppress the chattering of the sliding mode. The above control theory is applied to design the guidance law with terminal impact angle constrained, and the effectiveness of the guidance law is verified through simulation.