Detection of Bi–Directionality in Strain–Gage Balance Calibration Data
نویسنده
چکیده
An indicator variable was developed that may be used to visualize and detect bi–directionality in wind tunnel strain–gage balance calibration data. First, the calculation of the indicator variable is explained in detail. Then, an empirical criterion is proposed that may be used to decide which load components of a balance have bi–directional behavior. The criterion could be used, for example, to justify the selection of absolute value terms for the regression model of strain– gage outputs whenever the Iterative Method is chosen for the calibration data analysis. Finally, calibration data from NASA’s MK40 Task balance is analyzed in order to illustrate the calculation of the indicator variable and the application of the proposed empirical criterion.
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