The uncertainty of experimental derivatives:: application to strain measurement

被引：16
|
作者：
Lira, I [1 ]
Cordero, RR
François, M
Vial-Edwards, C
机构：
[1] Pontificia Univ Catolica Chile, Dept Mech & Met Engn, Santiago 4860, Chile
[2] Escuela Super Politecn Litoral, Fac Mech & Prod Sci Engn, Guayaquil, Ecuador
[3] Univ Technol Troyes, LASMIS, CNRS, FRE 2719, F-10010 Troyes, France
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2004年 / 15卷 / 12期
关键词：
least-squares adjustment; uncertainty analysis; moire; interferometry; strain fields;
D O I：
10.1088/0957-0233/15/12/005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A procedure is presented to evaluate the uncertainty of derivatives computed from polynomial curves or surfaces fitted to experimental data. The procedure takes into account the uncertainties in the dependent and independent variables and agrees with international recommendations. It is valid independent of the experimental technique from which data are obtained. The application of the procedure is demonstrated by evaluating the uncertainty of strains calculated by differentiation of whole-field displacement data obtained by moire interferometry.
引用
收藏
页码：2381 / 2388
页数：8
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