重庆理工大学学报2025，Vol.39Issue(23)：202-209,8.DOI:10.3969/j.issn.1674-8425(z).2025.12.025
直升机桨叶扭转刚度的高精视觉测量研究
High-precision vision measurement of helicopter rotor blade torsional stiffness
摘要
Abstract
To achieve high-precision measurement of the torsional stiffness of helicopter blades,this paper proposes a method for measuring the torsional stiffness of helicopter blades based on image recognition technology.First,the Zhang Zhengyou calibration method is employed to calibrate the binocular camera.Then,the improved SuperPoint network is used to detect the circular marker points and calculate the three-dimensional coordinates of the circle center.Next,the least squares method is adopted to fit the front and rear propeller planes of the load and the torsion angle difference between the two ends of the profile section is obtained.Finally,according to the torsional stiffness formula,the average torsional stiffness of the paddle profile section is calculated.The propeller measurement experiment is conducted in the static laboratory of an aviation unit.Experimental results show the detection accuracy of circular marking points reaches 99.6%.The actual measurement error is 0.034 1 mm,and the torsion angle difference of each section of the helicopter blade is highly linearly correlated with the load.The results of multiple experiments are consistently satisfactory,meeting the requirements for torsional stiffness measurement of helicopter blades.关键词
图像识别技术/桨叶扭转刚度/立体视觉标定/圆心标记点检测/扭转刚度解算Key words
image recognition technology/torsional stiffness of propeller blades/stereoscopic vision calibration/center marking point detection/calculation of torsional stiffness分类
航空航天引用本文复制引用
CHEN Qingtong,YANG Guanggen,XIONG Bangshu,ZHOU Xin..直升机桨叶扭转刚度的高精视觉测量研究[J].重庆理工大学学报,2025,39(23):202-209,8.基金项目
直升机动力学全国重点实验室2022年基金项目(61422202205) （61422202205）
