【作者】 何开锋； 钱炜祺； 汪清； 王文正；

【Author】 HE Kai-feng;QIAN Wei-qi;WANG Qing;WANG Wen-zheng;State Key Laboratory of Aerodynamics;China Aerodynamics Research and Development Center;

【机构】 空气动力学国家重点实验室； 中国空气动力研究与发展中心计算所；

【摘要】 飞行器的气动特性建模是飞行器飞控系统设计、飞行仿真、性能评估及飞行试验的基础。本文以高速带翼飞行器为研究对象,将其初步分为升力体和轴对称体两大类型,首先给出了升力体带翼飞行器气动特性"增量法"建模的基本思想,介绍了该方法在航天飞机气动特性建模中的应用;然后针对带翼轴对称飞行器建立了基于三角函数基函数的回归分析建模方法,并将偏最小二乘方法这一新型回归分析方法引入建模方法中,从标模算例计算结果看,偏最小二乘方法整体上优于正交最小二乘法。更多还原

【Abstract】 Aerodynamic data modeling is the basis of flight control system design,flight simulation,performance evaluation,and flight test of the flight vehicle.As far as the high speed winged flight vehicles are concerned,they often can be classified into two categories,i.e.,the lift body type and the axi-symmetric type.So,at first,the basic idea of increment method of modeling for lift body type flight vehicle is presented,and the application of this method for the shuttle’s aerodynamic data is introduced.Secondly,for axi-symmetric flight vehicle’s aerodynamic characteristic,the regression method based on trigonometric mathematical functions is developed and a new Partial Least Squares regression(PLS) method is utilized in the aerodynamic data modeling.From the modeling result of an exemplified winged rocket case,it can be seen that the PLS method is generally better than the now prevailing used Orthogonal Least Squares regression method.更多还原