| Autor: |
Zhang, Zheng Yu, Sun, Zhong Xiang, Huang, Xu Hui, Sun, Yan |
| Zdroj: |
Applied Mechanics and Materials; July 2012, Vol. 190 Issue: 1 p1273-1277, 5p |
| Abstrakt: |
The advanced precision of drag coefficient is 0.0001 for the high speed wind tunnel test of measuring forces, the model’s angle of attack precision is ≤0.01°following errors distribution. A videogrammetric method of model’s attitude is therefore proposed, its uncertainty is investigated, and a compensation method of its systematic error is also presented by this paper. The three engineering videogrammetric experiments of attack angle in 2 meter supersonic wind tunnel testing have demonstrated that measuring standard deviation of videogrammetric measurement system established by this paper is ≤0.0094°, in addition it neither destroys the model’s shape, nor changes the stiffness or strength, so it is useful and effective. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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