Real-time adjustment strategy for conflict-free taxiing route of A-SMGCS aircraft on airport surface

With regard to the real-time adjustment for conflict-free taxiing route planning of A-SMGCS aircrafts on airport surface, a colored taxiway-oriented Petri net model was proposed. The process of aircrafts accessing an airport road section according to the planned time windows could be interpreted as the access priority of aircrafts for a road section. Aircraft taxiing route was adjusted by decreasing the priority of delayed aircrafts to access road section, which could avoid long waits. To change priorities of aircrafts may lead to two kinds of conflicts: head-on conflicts and circular wait conflicts. Sufficient condition and priority change strategy of aircrafts conflict-free taxiing were proposed to solve those conflicts. The result demonstrates that the proposed method can avoid conflicts in route plans adjustment, and the control rules are simple, effective and suitable for real-time control.