摘要
针对大型低速风洞的试验条件特点,本文研究了基于双目立体视觉测量原理的模型姿态角视频测量技术,通过在试验模型刚性段布置数个特征标记点,采用两台2500万像素相机采集模型的运动图像,通过共线方程计算出标记点空间坐标,通过测量坐标系校正,基于刚体运动解算模型姿态角的算法,解算出试验模型的实际姿态角。利用高精度三轴光纤陀螺仪,在8m低速风洞中应用某大展弦比模型进行了无风/风载状态下模型姿态角对比测量试验。结果表明,模型姿态角最大测量误差为0.045°。
According to the characteristics of the test conditions of the large low-speed wind tunnel,the video measurement technology of the model attitude angle based on the binocular stereo vision measurement principle is studied.By arranging several feature marker points in the rigid section of the test model,two is million pixel cameras are used to collect the moving images of the model,the spatial coordinates of the marker points are calculated through the collinear equation,and the algorithm of solving the model attitude angle based on the rigid body motion is corrected through the measurement coordinate system,the actual attitude angle of the test model is calculated.Using high-precision three-axis fiber optic gyroscope,a high aspect ratio model was used in a 8m low-speed wind tunnel to measure the attitude angle of the model under no wind/wind load.The results show that the maximum measurement error is 0.045°.
作者
刘捷
王昊
刘实
许相辉
贾丹
Liu Jie;Wang Hao;Liu Shi;Xu Xianghui;Jia Dan(AVIC Aerodynamics Research Institute,Harbin 150001,China;Aerodynamic Noise and Control Lab of Heilongjiang Province,Harbin 150001,China)
出处
《气动研究与试验》
2023年第3期104-111,共8页
Aerodynamic Research & Experiment
关键词
大型低速风洞
视频测量
模型姿态角
立体视觉
large low speed wind tunnel
video measurement
model attitude angle
stereo vision
