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Well clear recovery for detect and avoid

Erik Theunissen, Brandon Suarez, Fabrice Kunzi

Abstract: The purpose of Detect and Avoid (DAA) is to maintain Well Clear between ownship and any potential intruders. One sub-function of a DAA system is the human interface where aural alerts and visual guidance for maintaining Well Clear are displayed to the pilot. However, situations can occur where Well Clear is lost. In such situations, the visual guidance must change from displaying guidance meant to maintain Well Clear to guidance that aids the pilot to recover Well Clear. This paper describes a concept for displaying guidance to maintain and recover Well Clear. A distinguishing feature is that the generated guidance is continuous before and after loss of Well Clear, i.e. no discontinuity occurs in the guidance when crossing the Well Clear boundary. The concept was evaluated using simulations and flight-testing, and some of the results are discussed here.
Keywords: Visualization / Resists / Geometry / Aircraft / Air traffic control / Time factors / Trajectory

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