Detect-and-Avoid (DAA) systems are essential to the safe operations of Unmanned Aircraft Systems, and have the objectives of mitigating collisions with and remaining Well Clear of manned aircraft. This paper analyzes four candidate DAA Well Clear definitions for non-cooperative aircraft using mitigated performance metrics of DAA systems. These DAA Well Clear definitions were proposed in previous work based on their unmitigated collision risk and maneuver initiation ranges. In this work they are evaluated using safety and operational suitability metrics computed from a large number of representative encounters. Results suggest that although the four candidate DAA Well Clear definitions provide comparable safety, the alerting characteristics give preference for the DAA Well Clear definition without a temporal parameter.
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机译：检测和避免（DAA）系统对于无人飞机系统的安全运行至关重要，其目标是减轻与有人驾驶飞机的碰撞并保持其良好的通畅性。本文使用简化的DAA系统性能指标，分析了四种针对非合作飞机的DAA Well Clear候选定义。这些DAA Well Clear定义是在先前的工作中基于其未缓解的碰撞风险和机动启动范围而提出的。在这项工作中，使用从大量有代表性的遭遇中计算出的安全性和操作适用性指标对它们进行评估。结果表明，尽管四个候选DAA Well Clear定义提供了可比的安全性，但警报特征优先选择了没有时间参数的DAA Well Clear定义。
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