Conflict detection in terminal area based on modified unscented particle filter

With increasing air traffic flow, the increasingly complex air traffic situation has raised possibility of conflicts, which requires higher timeliness and accuracy for conflict detection. Based on the rapidly growing air traffic control technologies, such as radars with excellent accuracy, a modified unscented particle filter (MUPF) algorithm is introduced to perform real-time aircraft status estimation. Compared to traditional unscented particle filter (UPF) algorithm, MUPF uses fewer particles and generates higher accuracy, resulting in considerable reduction in amount of computation. The simulation results show that MUPF has higher accuracy than UPF with the same number of particles, and in conflict detection, it also surpass UPF with lower rate of false alert, higher rate of success alert and smaller error.