Guidance Laws for Anti-Ship Missiles Using Impact Angle and Impact Time

Abstract

*† The general objective of most guidance laws is to guide a missile into a collision course so that the missile intercepts a target effectively under several constraint conditions. As the defense system for warships has been advanced recently, many researchers are working on the development of new guidance laws for anti-ship missiles. This paper deals with an impact angle based guidance law and an impact time based guidance law. The impact angle guidance law can be used to generate appropriate trajectories and intercept a target with desired impact angle. How to geometrically set the waypoint passing angles as well as the desired impact angle are proposed. The impact time guidance law based on proportional navigation guidance is also proposed in this paper. The proposed guidance law can be applied for the formation flight of anti-ship missiles. As several missiles intercept a target simultaneously, the missiles can complete the given mission more efficiently. Finally the two guidance laws are combined together to enhance the survivability and kill probability. Numerical simulations are performed to evaluate the performances of the proposed guidance laws using impact angle and impact.