| Performance software plays an important role in ensuring flight safety.At this stage,the performance software of domestic civil aircraft still has a lot of room for optimization.The development of performance software abroad is relatively mature and widely used in the daily operation of airlines,but due to its core confidentiality and model specificity,it cannot be directly applied to the performance calculation of domestic civil aircraft.Therefore,it is of great significance to continue to improve the performance software functions of domestic civil aircraft.At present,in order to meet the needs of domestic civil aircraft to extensively carry out PBN operation in the next step,it is necessary to continue to improve the track simulation function of performance software for PBN procedures.This thesis firstly analyzes the PBN leg according to the characteristics,combination rules and parameter matching principles of the commonly used path termination in PBN procedures.On this basis,the Bessel geodetic theme algorithm is introduced to solve the problem of forward and reverse waypoints.The calculated geodetic coordinates are converted into the runway plane coordinate system through the established algorithm,and the accuracy of the algorithm is verified by 5 runway data and Compsys21 software.After that,this thesis proposes a dynamic model based on track simulation,and analyzes the characteristic parameters that affect the flight track.Based on the previous analysis of the PBN leg,the analytical algorithm of the transition route between legs is given,and based on this,two calculation models of the horizontal profile track simulation model and the constant speed climb and accelerated climb in the vertical profile are established.The calculation method of each parameter is given.Finally,Matlab software is used to program the algorithm of horizontal and vertical profiles,and combined with the PBN departure procedure of an airport,the trajectory of a domestic civil aircraft is simulated and verified.The results show that the trajectory simulation algorithm established in this thesis can simulate the flight trajectory more accurately,so it can be applied to the performance software optimization of domestic civil aircraft. |
