Abstract
Conflict detection and resolution (CD and R) systems predict loss of separation between aircraft and propose conflict avoidance maneuvers for the aircraft involved in the conflict. Given a pair of aircraft in conflict, the ownship and the intruder, the resolution system diverts the ownship from its original trajectory. In this paper, we introduce the concept of recovery course. A recovery course redirects the ownship to its original target waypoint without introducing new conflicts, in a geometric optimal way. Based on resolution and recovery concepts, we also develop a strategic CD and R approach that produces conflict-free flight plans for the ownship and the intruder aircraft. The resolution and recovery algorithm is computationally efficient and amenable to formal verification. We provide a rigorous analysis of the problem and the basis of the correctness proof of our approach.
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