Design of Anti-ship Missile Guidance Law with Attack Time Constraints

In order to make the anti-ship missile attack the target according to the specified attack time and realize the saturated penetration attack, this paper establishes the relative motion model of missile and target in the horizontal terminal guidance section, and proposes a time-constrained guidance law based on dynamic inversion. The role of the guidance law is to adjust the missile 's attack time to its nominal value, and use the remaining time error to represent the difference between the current remaining time and the nominal remaining time. According to the relative motion relationship between the missile and the target, the control of the yaw channel indirectly controls the distance between the missile and the target at the current time through the lead angle. Therefore, the guidance law indirectly controls the residual time error through the lead angle. For this control system, the desired slow dynamics subsystem and the fast dynamics subsystem are designed by the method of time scale separation. The dynamic inverse control design is carried out for these two subsystems respectively, and the guidance command of the missile yaw channel is obtained. Finally, the effectiveness of the proposed guidance law is verified by simulation.