飞行器特性曲线拟合与飞行仿真研究

Flight Simulation and Curve-fitting for the Characteristics of Aircraft

随着计算机技术的高速发展,计算机仿真在航空航天领域得到了广泛的应用。飞行器的计算机飞行仿真计算涉及大量气动力特性和发动机特性参数,对这些参数采用两参数和三参数的曲线拟合方法替代过去的数值插值方法,减少了输入参数的数量,大大提高了仿真程序的代码效率和仿真实时性。基于这种方法拟合发动机和飞机气动特征的特性曲线,并利用Runge-Kutta方法建立了飞行方程的数值解算程序,对某型飞机起飞-巡航-降落过程进行了数值仿真。在此基础上设计了全程可视化程序,得到了全过程的舵面控制规律,为飞行模拟器的设计提供了有效的方法和手段。

With the development of computer technology, technique of simulation is widdy applied in the field of aerospace. Simulation of the aircraft relates to a mass of aerodynamic characteristics of aircraft and performance parameters of the engine. Using two or three - parameter curve-fitting instead of numerical interpolation, the number of the input parameters is reduced and the efficiency of code is greatly improved. Therefore the real time performance can be advanced. Based on the method, curve - fitting of aerodynamic characteristics of aircraft and performance parameters of the engine are worked out, and numerical process is coded by making use of the equation： Range-Kut-ta. Besides, the takeoff - cruise - landing flying procedure of an aircraft is numerically simulated. The visualized code is programmed to view the whole flying procedure, and to get the rules of rudder control. It provides an effective method and tool for the design of flight simulators.