The Design Of Impact Timecontrol Guidance Law

With the rapid development of modern antimissile technology, missile penetration is facing more and more challenges, the traditional single missile strike has been difficult to meet the requirements of modern war, as more and more effective penetration saturation impact means of modern missile impact more importance, and needs more saturation impact missile at a target, it is necessary for the missile the impact time is controlled by the need to control the missile maneuver; consume the remaining extra time in the control of missile impact time, this maneuver in the terminal guidance phase, may lead to the target from the missile seeker field of view, resulting in miss distance increases, need to restrict seeker angle control in missile impact at the same time, in order to ensure terminal guidance target in the seeker FOV range. The subject of the impact time can be controlled by the law of the pilot in-depth study.In the two-dimensional space with sliding mode variable structure theory is based, the remaining time to control the conversion for the distance between the missile and the target tracking, impact time control guidance law is designed to, after with proportional navigation guidance law is based, the additional time control impact time can be controlled. Finally, in three-dimensional space by the pitch channel based on sliding mode variable structure guidance law, yaw channel using the dynamic inversion method to design time control design control guidance law for the three-dimensional space at the time of the impact, and through the simulation to verify the effectiveness of the designed guidance law.Aiming at the control time impact missile maneuver will affect missile terminal guidance missile seeker field of view angle, design with a field of view(FOV) limit the impact time can be controlled by law, and to consider the different impact time and different initial heading angle and target to do uniform motion, the designed guidance law for the guidance effect. The simulation results show that the designed guidance law can ensure accurately hit the target, but also to meet of guided seeker angle limit. It is proved that the effectiveness of the designed guidance law.