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Evaluation of regression models of balance calibration data using an empirical criterion
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ulbrich, Norbert Volden, Thomas R. |
| Copyright Year | 2012 |
| Description | An empirical criterion for assessing the significance of individual terms of regression models of wind tunnel strain gage balance outputs is evaluated. The criterion is based on the percent contribution of a regression model term. It considers a term to be significant if its percent contribution exceeds the empirical threshold of 0.05%. The criterion has the advantage that it can easily be computed using the regression coefficients of the gage outputs and the load capacities of the balance. First, a definition of the empirical criterion is provided. Then, it is compared with an alternate statistical criterion that is widely used in regression analysis. Finally, calibration data sets from a variety of balances are used to illustrate the connection between the empirical and the statistical criterion. A review of these results indicated that the empirical criterion seems to be suitable for a crude assessment of the significance of a regression model term as the boundary between a significant and an insignificant term cannot be defined very well. Therefore, regression model term reduction should only be performed by using the more universally applicable statistical criterion. |
| File Size | 1526064 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120014340 |
| Archival Resource Key | ark:/13960/t9673fn0k |
| Language | English |
| Publisher Date | 2012-06-24 |
| Access Restriction | Open |
| Subject Keyword | Numerical Analysis Statistical Analysis Calibrating Linearity Wind Tunnel Tests Strain Gage Balances Wind Tunnel Apparatus Mathematical Models Regression Analysis Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
