Research On The Realization Of Terminal Maneuvering Trajectory For Anti-ship Missile

With the increase of the means of antimissile ability of naval vessels and formation aerial defenses, and the enhancement of the antimissile ability, anti-ship missile will be faced with multi-levels and time after time head off during the whole breakthrough. In order to adapt to characteristic and requirement of the future naval battles, how to improve breakthrough ability of the anti-ship missile has become an important research of every country.At present, anti-ship missile flying trajectory has relatively single form: in longitudinal plane realizing climb, cruise and terminal guidance, in course plane realizing "sector launching". In the condition that enemy has early warning plane, the missiles which have such trajectory are easily to be discovered, tracked and forecasted. And the enemy's early warning plane will lead the frontline ship to launch interceptor missiles or dense cannon array to fire. In order to increase the difficulty of forecasting our anti-ship missiles by the enemy, to reduce the enemy's response time and raise the breakthrough probability, anti-ship missiles should adopt the flight mode of the combination of supersonic and maneuverability. This is also what we should design in the paper.While designing winged missile flight control system, attitude stable scheme is traditional selected in our country. The method means that measuring the missile attitude angles and angle-rate by sensor, attitude angular PID control is executed by close loop. This scheme has many successful experiences in the application field with low Mach number and narrow altitude range of flying. But in the condition of supersonic flying in wide altitude range with high maneuverability, the attitude stable control scheme faces huge difficulty in realization of full utilizing the overload limitations and hardly ensures the demand to high maneuverable performance. The method of measuring the missile overload by sensors and realizing the overload control in close loop can solve the problem. On the base of overload control, we take the method of nonlinear control and design a composite control of linear/AVSC in this paper. On the result, we can see that the controller designed can solve the chattering problem of the sliding regime. On the base of overload stable loop, we design the flight control system through the control of height and lateral displacement. By designing the maneuverable signal at the end trajectory of anti-ship missiles, we can realize climb varying and snake trajectory. On the result, we can see that after maneuvering, the missile still can go back to the former trajectory, and the factual overload, height and lateral displacement are also satisfying.