基于迎角分区的全局飞行器气动参数辨识方法  

Global aircraft aerodynamic parameter identification method based on angle of attack partitioning

作　　者：臧剑文 毕晓烨 金钊 刘浩 闫明 ZANG Jianwen;BI Xiaoye;JIN Zhao;LIU Hao;YAN Ming(School of Aeronautics and Astronautics,Dalian University of Technology,Dalian 116024,China;Shenyang Aircraft Design&Research Institute,Shenyang 110035,China)

机构地区：[1]大连理工大学航空航天学院,辽宁大连116024 [2]沈阳飞机设计研究所,辽宁沈阳110035

出　　处：《系统工程与电子技术》2023年第11期3588-3596,共9页Systems Engineering and Electronics

基　　金：自然科学基金(U2141229);航空科学基金(2019ZC063001)资助课题。

摘　　要：针对综合考虑飞行器全局气动非线性特性,面向高效全局飞行器气动参数辨识需求,提出了一种基于迎角分区的改进气动参数辨识方法,采用轴正交决策树的迎角分区方法,将涉及大范围的迎角变量划分为多个区间,对每一区间使用递归最小二乘来估计气动导数,实现在每个区间内对线性气动特性进行辨识。通过引入加权函数的过渡方法,给出局部模型转化全局建模的计算准则,保证了整个模型的连续性。最后,通过某型飞机模型开展了迎角分区气动参数辨识及对比分析工作,结果表明迎角分区辨识吻合较好,且与传统全局辨识方法相比计算效率更高,说明了迎角分区辨识方法的有效性和优势。In order to comprehensively consider the global aerodynamic nonlinear characteristics of the aircraft and meet the requirements of efficient global aerodynamic parameter identification of the aircraft,an improved aerodynamic parameter identification method based on the angle of attack partition is proposed.The angle of attack partition method of the orthogonal decision tree is used to divide the angle of attack variables involving a large range into multiple intervals,and the recursive least squares are used to estimate the aerodynamic derivatives for each interval,realizing the identification of linear aerodynamic characteristics in each interval.By introducing the transition method of weighted function,the calculation criteria of local model transformation to global model are given to ensure the continuity of the whole model.Finally,the aerodynamic parameter identification and comparative analysis of the angle of attack subarea are carried out through a certain aircraft model.The results show that the angle of attack subarea identification is in good agreement and has higher computational efficiency compared with the traditional global identification method,which shows the effectiveness and advantages of the angle of attack subarea identification method.

关 键 词：迎角分区 气动参数辨识 加权函数 全局建模 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]