A Flight Situation Conflict Network Modeling Method Based on Three-Dimensional Velocity Obstacle Method

Aiming at the construction of flight conflict network under the condition of free flight, traditional methods usually take the position distance relationship between two aircraft as the standard of conflict judgment, which lacks aircraft heading information, can't judge potential conflict in time, and easily leads to conflict false alarm. Therefore, based on the traditional flight conflict network, this paper constructs an “ellipsoid” protected area, proposes a three-dimensional velocity obstacle model, and introduces it into the complex flight situation network for conflict judgment. Compared with position model, cylinder model and sphere model, the advantages of ellipsoid model based on velocity obstacle method are expounded. The conclusion shows that the false alarm rate of ellipsoid model is 39.21%, 12.17% and 55.66% lower than that of position, cylinder and sphere model; the modeling method can effectively reduce the redundant edges of the conflict network and the false alarm probability of the conflict; after adding visual elements, the conflict network can more accurately and intuitively reflect the complex situation of airspace, and improve the work efficiency of controllers.