Abstract:To resolve the problem of future airspace management under the condition of great traffic flow, high density, and small separation, a modular evolution model is built during the process of aircraft trajectory strategic planning. A state switch macroscopic Petri-net evolution model and three microcosmic Petri-net evolution models accompanied with the continuous change of aircraft speed and height in the same segment based on the aerodynamics models are presented. According to the different forms of aircraft characteristic parameter conversion and the hybrid evolution characteristics, four evolution models using differential Petri-net theory and three evolution modes using the combination of various evolution models are defined. The 4-D trajectory evolution graphs with aircraft performance constraints can be obtained by setting 10 flight segments and 15 defaults of height and speed. Theoretical analysis and simulation results demonstrate that the proposed models can enhance the versatility of trajectory prediction model and reflect the aircraft horizontal and vertical trajectory profiles precisely.