Safety risk assessment of UAVs operations in airport controlled airspace

Aiming at the scenario of the integrated operation of Unmanned Aerial Vehicles (UAVs) and transport aviation in the airport controlled airspace under the concept of urban air mobility, this paper proposes an airspace operation safety risk assessment method. Firstly, considering the maneuverability of UAVs and the position error of aircraft, a double-layer collision protection volume model is proposed; then, the Monte Carlo simulation method is used to simulate the aircraft error and calculate the collision probability. Furthermore, an improved Reich model suitable for the collision risk assessment of UAV routes and take-off and landing routes is proposed. Based on the improved Reich model, a risk assessment of UAV routes around a domestic hub airport is carried out. The results show that the collision risk between the Runway 33 landing route of the airport and the UAV operation route does not meet the Target Level of Safety (TLS) requirements. The study found that reducing the altitude and flight speed of the UAV route can reduce the collision risk, while changing the UAV route flow will not affect the collision risk.