Abstract
This paper presents a novel onboard system called In-Flight Awareness Augmentation System (IFA2S) to improve flight safety. IFA2S is designed to semi-automatically (with human supervision) avoid hazards and accidents due to either internal or external causal factors. The requirements were defined in an innovative way using Systems-Theoretic Process Analysis (STPA) method and applied next to model the system. IFA2S increases aircraft awareness regarding both itself and its environment and, at the same time, recognizes platform and operational constraints to act in accordance to predefined decision algorithms. Results are presented through simulations and flight tests using state machines designed to allow the adoption of appropriate actions for the identified hazards. The different decision algorithms are evaluated over as many as possible hazard situations by simulations conducted with software Labview and XPlane flight simulator. Flight tests are performed in a small fixed wing aircraft and make use of a limited version IFA2S, partially attending identified requirements. Results support the conclusion that IFA2S is capable of improving flight safety.
Highlights
IFA2S system remains in state “Idle” until an event leads to a state change
The recognition that flight safety is the main barrier to the acceptance of Unmanned Aerial Vehicles (UAVs) into airspace has driven the efforts for the development of means to increase its autonomy in risky situations
The development of the IFA2S system proved to be capable of avoiding accidents and hazards, via the increase of aircraft awareness and proper algorithms, based on both simulations and flight tests results
Summary
The current level of autonomy and decision making available in the UAV can be enhanced by employing computer systems that lead the level of autonomy for UAVs changes from a ground control system, with a human pilot in charge, to a fully autonomous flight. The high accident rates presented by Unmanned Aerial Vehicles (UAV) have given rise to debate about the risks involved in their operation. The complexity and the number of technical and subjective factors involved in the control of an UAV create conditions where the pilot does not act in a timely manner or does it wrongly
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
