Conflict detection and avoidance strategy research of plane flight

With the increasing of air traffic accident rate, conflict detection and avoidance strategy research of the plane flight will act as an important role in the insurance of air safety. With elliptic sphere as protection zone, the plane conflict detection model and conflict free model are set up. A brief introduction is presented about conflict free on horizontal and vertical direction, and then the conflict free model in the vertical direction is established based on nonlinear programming. Sequential quadratic programming algorithm is used to solve the nonlinear programming problem mentioned above. The simulation results show that the method presented in this paper can make the plane choose the optimal escape path effectively and avoid collision to improve flight safety reliability and security accordingly.