Three-Dimensional Guidance Law with Impact Angle Constraints

A three-dimensional guidance law was designed by using Lyapunov stability theory,which was based on the dynamics and kinematics of the relative motion between missile and target for missile guidance,and under the assumptions that the target was stationary,and the velocity of missile was a constant.According to the error between the real impact angle and the set impact angle,the desired kinematics of LOS(line of sight) was analyzed and designed,based on which,a three-dimensional guidance law with impact angle constraints was given.Simulation results show that the proposed method is right and effective.