Collision Risk Assessment in TCAS Warning Situation Based on 3D Monte-Carlo
Some single-runway airports have both transport and flight training missions.Around these air-ports,it is common for training aircraft on the downwind leg to extend its leg to avoid conflict with trans-port flights on the final leg.This can result in the transport aircraft's Traffic Collision Avoidance System(TCAS)generating a TA(Traffic Advisory)warning.This paper proposes a 3D collision risk assessment model to evaluate the collision risk between two aircraft in this specific scenario.First,the aircraft position prediction model is established,and the Monte Carlo method is used to obtain the position distribution of the aircraft at each moment.Secondly,a TCAS collision model is established based on the definition of the TCAS system.Finally,the number of Monte Carlo samples of the training aircraft entering the TCAS colli-sion model is counted to evaluate the collision risk between the two aircraft.The research results show that,under the condition that the lateral distance between the downwind leg and the runway is not less than 2 037 meters,after the training aircraft on the extended downwind leg causes the transport aircraft on the final leg to issue a TA warning,both aircraft can continue flying along their respective downwind and final legs.In the subsequent flight process,the collision risk of the two aircraft is less than 1×10-7 times per hour,as stipulated by ICAO,which meets the safety target level.
collision risk3D Monte-CarloTCAS warningcollision modeltraining and transport aircraft
万方数据
维普
