Simulation Research Of Flight Management System Of Large Civil Aircraft

Flight Management System is an important avionics system on a large civil aircraft.Its main function is to generate optimized horizontal and vertical tracks according to the flight plan entered by the pilot and to control the aircraft to stick to the optimized track.FMS controls the aircraft's full profile flight management.It also can adjust the flight plan according to the flight conditions during the flight,and restart the track optimization and navigation.This paper simulates the flight management system of large civil aircraft,establishes the flight management system simulation structure.This paper mainly focuses on the simulation of core functions of FMS: horizontal profile flight management,vertical profile flight management and take-off performance calculation.Specific work as follows:(1)According to ARINC702 protocol this paper analyzes the function of FMS,it establishes FMS simulation structure and carries out integrated simulation on IPT.(2)This paper analyzes the function of horizontal profile flight management.First of all,it analyzes the realization process of the function;Secondly,it establishes the horizontal navigation function model;Then it focuses on the optimization of horizontal track.In this paper,the shortest path is used as the target of horizontal track optimization,the optimization model is built by the algorithm of the great circle.Finally,the optimization is realized based on the ant colony algorithm.(3)This paper analyzes the function of vertical profile flight management.First of all,it analyzes the realization process of the function;Secondly,it sets up the vertical navigation function model;Then it focuses on the optimization of vertical track.In this paper,the minimum flight cost is the goal of vertical track optimization.This paper uses the energy state method to establish the trajectory optimization model.Finally the optimization is realized based on the genetic algorithm.(4)This paper researches the take-off performance calculation function.Firstly,the definitions and calculation methods of various performance parameters during the take-off phase are discussed.Then the relevant data of take-off distance are analyzed respectively on dry runway and wet runway model.Finally,this paper completes the comprehensive simulation of take-off performance calculation function.