基于误差修正模型的机翼风洞试验弯扭变形测量方法
Error correction based measurement method for wing bending and torsion deformation caused by high-speed airflow in wind tunnel
陈光希 1梁浚哲 2张征宇 3呼煜超 1梁晋1
作者信息
- 1. 西安交通大学机械工程学院精密微纳制造技术全国重点实验室 西安 710049
- 2. 西安交通大学微电子学院 西安 710049
- 3. 中国空气动力研究与发展中心高速空气动力研究所 绵阳 621000
- 折叠
摘要
风洞试验中,机翼在高速气流下产生弯曲、扭转变形,本文提出一种基于误差修正模型的机翼弯扭变形测量方法.首先,利用基于摄影测量的相机标定方法求得相机畸变参数,采用数字图像相关法定位与追踪荧光点的无畸变像素坐标.然后根据摄影测量技术建立气流坐标轴系标定板,并利用气流坐标轴系标定板标定相机外参及求取机翼上荧光标记点的Y坐标.最后,根据标记点已知的Y轴向约束,建立单双目测量系统各自的三维重建模型及弯扭变形的误差修正模型,并以模型迎角为 0°水平时为基准状态计算吹风状态下机翼弯扭变形.经试验验证,本文提出的机翼扭转变形测量误差小于 0.01°,机翼弯曲变形测量误差小于 0.15 mm/m.该方法可为飞行器设计提供可靠及鲁棒的实验数据.
Abstract
In the wind tunnel experiment,high-speed airflow will cause bending deformation and torsion deformation in the wing.This paper proposes a method for measuring the wing bending and torsion deformation based on the error correction model.First,the camera calibration method based on photogrammetry is used to obtain the camera distortion parameter with the use of digital image correlation method to locate and track the distortion-free pixel coordinates of fluorescent points.Then an airflow calibration plate with coordinate axis system is established based on photogrammetry technology,and the airflow coordinate axis calibration plate is used to calibrate the external parameters of the camera and obtain the Y coordinate of the fluorescent marker point on the wing.Finally,the three-dimensional reconstruction models of the single and binocular measurement systems and the error correction model for bending and torsion deformation are established with the known Y-axis constraints of the marker point.When the angle of attack is 0° horizontally,the bending and torsional deformation of the wing in the blowing state is calculated as the reference state with the model.After experimental verification,the measurement error of wing torsional deformation proposed in this article is less than 0.01°,and the measurement error of wing bending deformation is less than 0.15 mm/m.This method can provide reliable and robust experimental data for aircraft design.
关键词
误差修正/弯曲变形/扭转变形/摄影测量Key words
error correctio/bending deformation/torsional deformation/photogrammetry引用本文复制引用
出版年
2024
NETL
NSTL
万方数据