Journal Published Online: 06 August 2010
Volume 39, Issue 2

Determining the Slope and Quality of Fit for the Linear Part of a Test Record



It is often necessary to determine the slope of a linear region within a test record, and for standardization purposes, it is desirable to have a method for determining the slope that is not subjective. A fully automated algorithm is presented, which is independent of operator judgment for data sets that meet specific quality of data and fit criteria. The algorithm uses analysis of residuals to simulate the visual process of determining the linear region. Analysis of benchmark and real test data provide validation that the algorithm correctly differentiates between problem data (noisy, insufficient digital resolution, or no significant linear range) and good data.

Author Information

Graham, Stephen
Mechanical Engineering Department, United States Naval Academy, Annapolis, MD
Adler, Matthew
Jacobs ESTS Group/ICRC, Marshall Space Flight Center, Huntsville, AL
Pages: 9
Price: $25.00
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Stock #: JTE103038
ISSN: 0090-3973
DOI: 10.1520/JTE103038