Volume 39, Issue 2 (March 2011)

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

    (Received 12 February 2010; accepted 5 July 2010)

    Published Online: 2010

    CODEN: JTEOAD

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    Abstract

    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 M.
    Mechanical Engineering Department, United States Naval Academy, Annapolis, MD

    Adler, Matthew A.
    Jacobs ESTS Group/ICRC, Marshall Space Flight Center, Huntsville, AL


    Stock #: JTE103038

    ISSN: 0090-3973

    DOI: 10.1520/JTE103038

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    Author
    Title Determining the Slope and Quality of Fit for the Linear Part of a Test Record
    Symposium , 0000-00-00
    Committee E08