Abstract：Aiming at the terminal guidance problem of interceptor with terminal attack angle, a double closed-loop guidance law is proposed. The relative motion model of missile and target is established, and the inner loop is designed to control the line of sight angular velocity and eliminate the target velocity disturbance; The outer loop controls the line of sight angle to realize line of sight angle tracking. The controller parameters compensate the nonlinear parameters of the model and simplify it to a linear system to realize line of sight tracking. Finally, this guidance law is simulated and compared with proportional guidance law and optimal guidance law to analyze the interception effect for different speed targets. The simulation results show that the guidance law can realize the line of sight angle constraint, the terminal trajectory is smoother than the proportion guidance law. For high-speed targets, the guidance law can still preserve good interception effect and angle constraint effect.
