Research On The Setting Method Of Aircraft Pushback Stop Point In Apron Stand

With the rapid development of civil aviation market,The shortage problem of airport ground operation resources gradually appears.In view of the complex apron configuration of domestic large airports and the conservative interval of traditional pushback procedures,unnecessary apron delays and frequent ground hot spots are caused,which put forward new requirements and challenges for aircraft ground operation.It become an important factor to limit the ground flow.This paper deeply studies the setting method of pulling position from two dimensions:safety assessment and efficiency optimization,which tries to seek an efficient and safe apron operation mode,and optimizes the traditional pushback procedure,so as to reduce the apron delay and improve the ground operation efficiency under the premise of ensuring the safety of aircraft ground operation.The main research contents of this paper are as follows:(1)The kinematic characteristics of aircraft pushback are analyzed.Before studying the pushback point,firstly,the pushback motion regular and structure mechanism of the aircraft are sorted out by searching the literature.The characteristics of common wheeled structures were summarized,and the advantages and disadvantages of dynamic and kinematic models were compared.Based on the rolling characteristics of tires and the kinematic characteristics of three-wheel support structure,a kinematic simulation model of aircraft pushback was established,which provided algorithm support and theoretical basis for the safety analysis and software design of aircraft pushback.(2)Establish the safety criterion of aircraft pushback.By studying the causes of aircraft apron delay and the types of conflicts,the safety criteria of aircraft pushback are summarized.Furthermore,the problems existing in the traditional pushback program are analyzed,and the feasibility of optimized setting of stop point is studied deeply.Finally,Air TOp simulation is used to build a static pushback model based on stop-point forward,and an example is analyzed.(3)A dynamic aircraft pushback point selection model based on genetic algorithm is constructed.The stop point selection problem of multiple aircraft belongs to multi-objective optimization problem,so genetic algorithm is selected to study the stop point in apron area.Firstly,a number of stop point selection schemes are automatically generated through model calculation.Finally,the optimal stop point selection scheme is obtained by comparing the numerical results.(4)Simulation verification of various models.Matlab computer simulation and Air TOp scene simulation are used in this paper.Matlab simulation can ensure the feasibility of the model in theory and algorithm design,and reflect the optimization effect of the model in numerical results.Air TOp simulation ensures that it is effective and feasible in real operation scenes and can be applied to real scenes.(5)The aircraft pushback kinematics model is applied to CAD secondary development and driver steering Angle guidance program development.The driver’s steering Angle program is based on the incomplete kinematics algorithm and the human-computer interaction function of Matlab GUI.It can automatically generate the standard rolling Angle value and rolling track two-dimensional image after the machine position information is input,for the reference of the cart driver.The CAD secondary development based on the built-in program of Visual Studio is to realize the automatic generation of the pushback track of specific aircraft by inputting the command information of aircraft type and position,which is used for the safety analysis of the pushback of aircraft.