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

    Volume 39, Issue 2 (March 2011)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 6 August 2010

    Page Count: 9


    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

    (Received 12 February 2010; accepted 5 July 2010)

    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.


    Paper ID: JTE103038

    DOI: 10.1520/JTE103038

    ASTM International is a member of CrossRef.

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