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Analysis of sting balance calibration data using optimized regression models (Document No: 20100024136)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ulbrich, N. Bader, Jon B. |
| Copyright Year | 2010 |
| Description | Calibration data of a wind tunnel sting balance was processed using a candidate math model search algorithm that recommends an optimized regression model for the data analysis. During the calibration the normal force and the moment at the balance moment center were selected as independent calibration variables. The sting balance itself had two moment gages. Therefore, after analyzing the connection between calibration loads and gage outputs, it was decided to choose the difference and the sum of the gage outputs as the two responses that best describe the behavior of the balance. The math model search algorithm was applied to these two responses. An optimized regression model was obtained for each response. Classical strain gage balance load transformations and the equations of the deflection of a cantilever beam under load are used to show that the search algorithm s two optimized regression models are supported by a theoretical analysis of the relationship between the applied calibration loads and the measured gage outputs. The analysis of the sting balance calibration data set is a rare example of a situation when terms of a regression model of a balance can directly be derived from first principles of physics. In addition, it is interesting to note that the search algorithm recommended the correct regression model term combinations using only a set of statistical quality metrics that were applied to the experimental data during the algorithm s term selection process. |
| File Size | 3324982 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100024136 |
| Archival Resource Key | ark:/13960/t4km48s4f |
| Language | English |
| Publisher Date | 2010-08-02 |
| Access Restriction | Open |
| Subject Keyword | Numerical Analysis Algorithms Weight Indicators Calibrating Independent Variables 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 |
