| タイトル | A Universal Threshold for the Assessment of Load and Output Residuals of Strain-Gage Balance Data |
| 本文（外部サイト） | http://hdl.handle.net/2060/20170000333 |
| 著者（英） | Ulbrich, N.; Volden, T. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 2017-01-09 |
| 言語 | eng |
| 内容記述 | A new universal residual threshold for the detection of load and gage output residual outliers of wind tunnel strain{gage balance data was developed. The threshold works with both the Iterative and Non{Iterative Methods that are used in the aerospace testing community to analyze and process balance data. It also supports all known load and gage output formats that are traditionally used to describe balance data. The threshold's definition is based on an empirical electrical constant. First, the constant is used to construct a threshold for the assessment of gage output residuals. Then, the related threshold for the assessment of load residuals is obtained by multiplying the empirical electrical constant with the sum of the absolute values of all first partial derivatives of a given load component. The empirical constant equals 2.5 microV/V for the assessment of balance calibration or check load data residuals. A value of 0.5 microV/V is recommended for the evaluation of repeat point residuals because, by design, the calculation of these residuals removes errors that are associated with the regression analysis of the data itself. Data from a calibration of a six-component force balance is used to illustrate the application of the new threshold definitions to real{world balance calibration data. |
| NASA分類 | Numerical Analysis; Mechanical Engineering |
| レポートNO | ARC-E-DAA-TN36885 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
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