Study On Temporary Route Planning And Evaluation In Busy Airspace

With the continuous economic development,the conflicts between the military and civil aviation due to the allocation of airspace resources have become increasingly prominent.A small proportion of civil airspace has led to congestion of air routes and flight delays.In order to achieve flexible use of airspace resources,To optimize the airspace structure,my country has implemented a temporary route policy,but the existing temporary routes are mostly straight lines between two waypoints,lacking scientific theoretical basis.Therefore,this paper studies the related issues of temporary route planning.First of all,quantitatively calculate the busyness of all sectors within a specific airspace,find areas with strong demand for temporary route demarcation,and construct multiple sectors from three aspects: static route network structure indicators,dynamic aircraft operation indicators,and special airspace indicators.The evaluation index system relies on the entropy method to assign weight to the index,and determines the membership degree of each sector through the fuzzy comprehensive evaluation method,realizes the classification of the busyness of the sector,and locks the designated area.Secondly,with the shortest path as the goal,research on temporary route planning methods under different restricted airspace opening situations.When restricted airspace is partially opened,geometric algorithms are introduced to make the planned temporary route bypass the closed restricted airspace;when restricted airspace is partially opened Many and irregular opening times,the artificial potential field algorithm is introduced to construct the repulsive potential field and the gravitational potential field.Because the traditional artificial potential field method is prone to the problem of unreachable target points and local minimum problems,it is improved,one On the one hand,the distance factor between the aircraft and the target point is increased to improve the repulsive force potential field function.On the other hand,additional forces are introduced in the path planning process to make the planned path reach the target point smoothly.The feasibility verification of the algorithm was carried out based on an example of a certain sector in the Beijing Flight Information Region.Air TOp simulation software is used to simulate and evaluate the results of sector temporary route planning.The evaluation results show that the provision of temporary routes can effectively shorten the average flight time of flights,reduce the flow of flights at key points in the airspace,and improve operational efficiency.Finally,it analyzes the temporary route planning method that assumes the role of main route diversion,introduces the concept of time window,takes the shortest path as the goal,and combines the constraints of turning angle,aircraft performance,and flight safety to construct a three-dimensional dynamic temporary route planning model.In order to solve the computational complexity caused by the multi-restrictive airspace,the simulated annealing algorithm is combined with the improved artificial potential field method.On the one hand,the optimal gain parameter value can be obtained,and the system error caused by manual setting can be avoided.On the other hand,the simulated annealing algorithm is used.The algorithm’s self-iteration realizes optimal path planning.Combining with the domestic main routes A593 and A599 to verify the effectiveness of the model algorithm,and then relying on Air TOp simulation software to simulate and evaluate the planned temporary routes,the evaluation results show that the diversion temporary routes can shorten the average flight time and increase the airspace capacity.