Trajectory optimization for a missile using a multitier approach

A two-tier approach to the midcourse trajectory design for a surface-to-air missile to maximize the probability of hit is presented. The first tier re presents the midcourse trajectory of the missile, and the second tier repre sents the terminal homing phase. The first-tier trajectory is optimized wit h an auxiliary constraint on the value of the approach angle to the interce pt at handover to the terminal phase. The handover approach angle Is used a s the governing parameter in generating a field of optimum first-tier midco urse trajectories. The second-tier model estimates the probability of hit i ncluding a full suite of stochastic error sources on the seeker and missile . The optimal approach angle and midcourse trajectory are demonstrated to b e dependent on the terminal homing noise contributors and the target maneuv er.