| With the rapid development of civil aviation,the demand for air traffic continued to increase,which the limited airspace has always been an important bottleneck restricting air traffic.Protecting and rationally utilizing airspace resources and improving airspace utilization are the key to improving operational capability.The airspace of the terminal area and its operation are used to effectively and reasonably evaluate the airspace utilization of the terminal area.Constructing a utilization assessment model adapted to the terminal airspace is a fundamental study in airspace management.This paper summarizes the research state of airspace utilization at home and abroad.Taking the terminal airspace as the research object,from different angles,the relevant terminal airspace utilization evaluation methods are deeply studied,in order to provide reference for airspace management.The main research work of this paper is as follows:Firstly,the obtained data is filtered and pre-processed so that the operational data meets the requirements and the data samples are normalized and standardized according to certain rules.For the existing air traffic flow in different operation phases in the terminal area,spectral clustering is used to identify the various types of traffic flow in the terminal area and to extract the reference track of the corresponding track.The feature quantity that can measure the phase of the traffic flow is defined and extracted.Provide basic data support for subsequent research analysis.Secondly,starting from the traditional evaluation aspect,based on the original research and the operational characteristics and regulations of the aircraft in the terminal area,the analytic hierarchy method is used to establish the airspace utilization evaluation index system of the terminal area.Then,there is a certain correlation between the indicators of the indicator layer,and the evaluation analysis model of the gray component of the principal component is used to complete the evaluation calculation from the indicator layer to the criterion layer.Finally,the number of indicators in the criterion layer is small and no longer relevant,then the entropy method is used to achieve a comprehensive evaluation of the target layer.The evaluation of the terminal area utilization rate is evaluated by a new combined evaluation model,and the evaluation results are closer to reality.Finally,through the analysis of the operational process of traffic flow in different operational phases in the terminal area airspace,different evaluation models for the airspace utilization of terminal areas in their respective phases are derived.Then,according to the importance degree of different stages,the corresponding weights are given,and a comprehensive estimation model of the airspace utilization rate of the terminal area is obtained.After obtaining a series of time-spaced terminal area airspace utilization in a series of continuous time,a utilization time series is formed,and after determining the stationary and non-white noise sequences,a time series ARIMA analysis model is established.Finally,the accuracy of the model is verified by analyzing the white noise of the sequence residuals and using a certain number of test sets. |
