Safety Assessment of UAV Operations in U-Space: A Comprehensive Study on Key Safety Metrics

This study examines safety metrics for unmanned aircraft systems in urban airspace, specifically looking at how GPS (the satellite positioning system) and IMU (inertial measurement unit, a sensor that tracks motion and orientation) failures affect collision risk and surveillance performance under different conditions like varying speeds, traffic density, and weather. Researchers tested these failures to identify which safety metrics are most reliable for detecting risk and how well fail-safe systems (automatic safety mechanisms that activate when failures occur) protect against accidents.