Investigation of Alerting and Prioritization Criteria for Sense and Avoid (SAA).

摘要

Sense and Avoid (SAA) systems require logic that will alert on other aircraft, prioritize amongst other aircraft, and recommend maneuvers. Alerting and prioritizing logic needs to be well integrated for correct prioritization and to reduce nuisance alerts. As a result of the larger time scales involved, the self-separation function will have a greater need to prioritize multiple intruders than collision avoidance. This report explores tau-based criteria when issuing SAA alerts. Deficiencies in current tau-based criteria are detailed. New time estimation criteria are proposed for issuing alerts and prioritizing aircraft. Further work in maturing time-based prioritization criteria is still needed if time estimates are to be used with SAA systems.