A320 Aircraft Movement Simulation Model Research

A problem which is using of the parameter identification method to confirm the pneumatic derivative in the aircraft movement model is researched in this paper. In some aircraft simulation system without great accuracy, or in the development of low flying training simulator or flight training devices, the aerodynamic coefficient model in aircraft movement mathematical model does not have to use complex nonlinear model, which also can be a simple line model. Therefore, this paper has established A320 aircraft movement mathematical model, whose theoretical basis is flight mechanics. In the aircraft model, the aerodynamic coefficients model is in the simple linear, based A320 aircraft QAR data. Firstly, pre-process of the data; Secondly,identify the pneumatic derivative in aerodynamic coefficient model, put it into the designed aircraft flight simulation aircraft model; Lastly analyze the simulation results and summarize found problems in the process of the identification. What this paper has done is in the following aspects:1. According to the flight mechanics, establish the A320 aircraft movement mathematical model, in which the aerodynamic coefficient model forms a simple linear model through the analysis process, which is the aerodynamic force and aerodynamic force moment of the mathematical model.2. According to the characteristics of the aircraft QAR data and needs of the parameter identification, filter the data, and select the parameters used in identification.3. Use the least squares procedure to make parameter identification, whose object is the aerodynamic force and aerodynamic force moment in the aircraft motion model; Then use aircraft model for the flight simulation experiment, verify the identification method and the reliability of the identification results.This paper gets the result that with this method of identification, the obtained aerodynamic derivatives can be achieved to some extent in the A320 vertical movement simulation, by comparing the results of A320 vertical movement simulation with the real data of QAR height, pitch angle and vertical velocity.