Before unmanned aircraft can fly safely in civil airspace, robust airborne collision avoidance
systems must be developed. Instead of hand-crafting a collision avoidance algorithm for …

EXECUTIVE SUMMARY The Traffic Alert and Collision Avoidance System (TCAS), currently
mandated on all large transport aircraft, has been shown to significantly reduce the risk of …

ACAS Xu provides both a collision avoidance (CA) and detect and avoid (DAA) capability for
UAS. The CA decision logic is based on Markov decision process models of the CA problem …

This paper presents a scalable method to efficiently search for the most likely state trajectory
leading to an event given only a simulator of a system. Our approach uses a reinforcement …

Finding the most likely path to a set of failure states is important to the analysis of safety-
critical systems that operate over a sequence of time steps, such as aircraft collision …

Demand for small unmanned aircraft systems (sUAS) continues to increase in diversity and
volume, however applications are currently limited by regulatory requirements for visual …

An effective collision avoidance system for unmanned aircraft will enable them to fly in civil
airspace and greatly expand their applications. One promising approach is to model aircraft …

The Traffic Alert and Collision Avoidance System (TCAS) is mandated worldwide on large
commercial aircraft and has been shown to substantially reduce the risk of mid-air collision …

Designing robust machine learning systems remains an open problem, and there is a need
for benchmark problems that cover both environmental changes and evaluation on a …

An important consideration in the development of aircraft collision avoidance systems is how
to account for state uncertainty due to sensor limitations and noise. However, many collision …