摘要
在飞行仿真建模过程中,快速、精确的气动导数查寻可以提高仿真系统的实时性和逼真性。在研究大量现有气动导数查寻方法的基础上,提出了一种运用三次样条法、双三次样条法进行气动导数查寻的新思路,该方法不仅避免了以往线性插值的"局部性",提高了计算结果的精度,而且还克服了函数(多项式)拟合法导致动力学模型通用性差的缺陷。仿真实验表明,该方法在气动力和气动力矩的计算中是有效的、可行的。
In modeling procedures of flight simulation, looking up aerodynamic derivatives fast and accurately can improve the verisimilitude and real-time of simulation system. By researching existing look-up methods of aerodynamic derivatives, this paper puts forward a new method of looking up aerodynamic derivatives using a thrice spline method and a double thrice spline method. This method not only avoids ＂locality＂ of conventional linear interpolation and advances the precision of results, but also gets over limitation of universality of a flight dynamic model resulted from fitting function （polynomial）. The simulation experiment proves that this method is effective and feasible in the computational process of aerodynamic forces and aerodynamic moments.
出处
《飞行力学》
CSCD
北大核心
2008年第2期74-76,80,共4页
Flight Dynamics
关键词
三次样条
气动导数
插值法
thrice spline
aerodynamic data
interpolation method
