Minimum-Time Trajectory for Escort-Assisted Evasion from a Sensing-Limited Pursuer
This paper studies a minimum-time path-planning problem in which an escort assists a leader by triggering and redirecting a sensing-limited pursuer. For the post-engagement case with equal leader, escort, and pursuer speeds, we show that the minimum-time leader trajectory has a three-phase structure: an initial straight segment, a moving-boundary segment, and a final straight segment to the goal. The boundary-following kinematics and the corresponding entry and exit conditions are derived and used to construct the leader trajectory for a fixed escort engagement direction. The engagement direction is then optimized over the feasible set to obtain the minimum-time solution. Numerical results illustrate the resulting trajectory and the benefits of escort assistance.