A game theoretical interceptor guidance law for ballistic missile defence

Defence scenarios against manoeuvrable tactical ballistic missiles are formulated as imperfect information zero-sum pursuit-evasion games. Both missiles, the “blind” tactical ballistic missile (evader) and the interceptor (pursuer) have first-order dynamics. The interceptor guidance law is based on the perfect information game solution, assuming target manoeuvre knowledge, and has a point capture (robust “hit-to-kill” accuracy) potential. The estimation process of the evader´s manoeuvre is approximated by a delayed perfect information outcome. The paper evaluates the effect of estimation delay on the guidance performance and outlines a methodology to assess the probability of interception avoidance by randomly manoeuvring evaders