Design of Terminal Sliding Mode Attack Guidance Law with Impact Angle Constraint

Aiming at improving the control precision and stability of attack guidance control law against fixed targets and low-speed mobile targets. Combined with the sliding mode control theory, this paper first transforms the problem with angle of impact constraint into a sliding mode surface design problem with LOS angle and LOS rate as state space variables, and then carries out a joint design with the reaching law, and finally puts forward the terminal sliding mode attack guidance law. The stability and convergence of the guidance law are proved by the Lyapunov stability mathematical principle. The theoretical design and experimental data show that compared with the traditional guidance control law, the attack guidance law proposed in this paper can achieve good fall angle constraint and extremely high hit rate design, and have the advantages such as fast convergence and high robustness.