For UAS to be granted full access to civil airspace, their safety case must address collision avoidance, including the lack of an onboard pilot who could see-and-avoid other traffic, as on conventional aircraft.
Modeling for UAS Collision Avoidance
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For UAS to be granted full access to civil airspace, their safety case must address collision avoidance, including the lack of an onboard pilot who could see-and-avoid other traffic, as on conventional aircraft. This paper discusses several methods and tools that have been accepted for modeling and evaluating the safety of collision avoidance for manned aircraft. Example results are illustrated. Issues and additional work for extending their use to UAS are discussed. Today, many manned aircraft are equipped with the Traffic Alert and Collision Avoidance System (TCAS II), the world standard system for collision avoidance. However, simply installing that system aboard UAS is problematic for a number of reasons affecting the safety calculation.