The use of a differential game and an optimal control theoretic approach for computing danger zones for this particular problem is new. The space outside the danger zone is deemed provably safe, implying that during blunder situations, emergency evasive maneuvers starting from outside the zone are guaranteed to be safe within limits on the maneuver severity of both the blundering and evading aircraft. In addition, these zones can be computed online in real time with knowledge of the current state. The algorithm also provides the minimum runway spacings for independent approaches and the minimum longitudinal separation between aircraft for dependent approaches. The algorithm for computing the zones has been validatedwith over one million simulationruns, where the adjacent aircraft performed various blunder trajectories. The validation shows that the algorithm could successfully alert and prevent collisions in 100% of the simulations ran.
Outside such danger zones, evasive maneuvers are provably safe REF .
Computing Danger Zones for Provably Safe Closely Spaced Parallel Approaches
Journal of Guidance, Control, and Dynamics
Journal of Guidance, Control, and Dynamics
Engineering Computer Science