2.4m跨声速风洞的模型位移视频测量精度研究  

Precision investigation on model displacement videogrammetric measurement in 2.4m transonic wind tunnel

作　　者：张征宇[1,2] 喻波[1] 罗川[2] 孙岩[1] 周桂宇[1] 黄诗捷[2] 

机构地区：[1]中国空气动力研究与发展中心空气动力学国家重点实验室,四川绵阳621000 [2]西南科技大学信息工程学院,四川绵阳621010

出　　处：《实验流体力学》2011年第4期79-82,共4页Journal of Experiments in Fluid Mechanics

基　　金：国家自然科学基金(51075385)资助项目;四川省科技创新苗子工程(10zd3109)资助项目;国家'973'计划课题(2009CB723802)项目

摘　　要：风洞试验中模型的位置和变形测量对试验数据精准度至关重要。为此，创建2．4m跨声速风洞的模型位移视频测量系统，提出度量其测量误差的方法，并实验研究其测量精度。研究发现，试验中的振动对测量精度影响极大，采用振动环境中相机位、姿解算方法后，试验段底部的编码标记点的测量误差从22．80-48．48mm降至0．03～0．64mm。It is crucial that measuring position and attitude of model in wind tunnel tests for the precision and accuracy of test data. Therefore, the model displacement videogrammetric measurement system of 2.4m transonic wind tunnel is firstly constructed and the method to describe its measuring error is presented. The measuring precision is investigated by experiments. It has demonstrated that the vibration is a very important factor to enlarge measuring error, and the errors of code points on the wind tunnel bottom are greatly decreased from 22.80-48.48mm to 0.03-0.64mm using the method of camera orientation in vibration environment.

关 键 词：模型位移测量 风洞试验 振动环境 

分 类 号：O432.2[机械工程—光学工程] V211.7[理学—光学]