Trajectory Modulation Guidance Law for Anti-ship Missiles

Abstract

In this paper, a new optimal homing guidance law with terminal angle constraints is developed to improve the survivability of anti-ship missiles. Since it is difficult for a pursuing missile to hit missiles with weave maneouvres and impact angle control, the proposed guidance generates stable and robust weave manoeuvres while guaranteeing homing along with a desired terminal angle. A new virtual state variable is introduced to provide one more degree of freedom resulting in weave manoeuvres on the missile trajectory. The physical meaning and role of the virtual state variable is also investigated. We analyse the effect of the design parameters on weave patterns, such as the weighting factor in the optimal guidance problem and initial value of the virtual state variable.