Epistemic Review
Sourced from the Coursera TUM MOOC on Urban Air Mobility. This note requires a lot of rework as I quickly captured and dumped information from the lectures
See and avoid → Sense and avoid → Detect and Avoid (DAA)
- Remain Well Clear (RWC)
- Separation Management
- Conflict Geometry
ACAS-X is a recent approach to aircraft collision avoidance formulated by the FAA that seeks to replace the longstanding TCAS-II framework. L3Harris is developing their own ACAS-X framework for Urban Air Mobility
ACAS-X is designed to minimize/avoid NMAC collisions
NMAC
NMAC - Near Mid-Air Collision. This happen when two aircraft are pretty close to ramming into each other. A horizontal distance of within 500 ft and a vertical distance of within 100 ft
ACAS-X works by maintaing a decision lookup table that contains a set of all possible ways and states of aircraft - the configuration space. These are generated using a Markov Decision Process (MDP) and they’re discretized in state space