DocumentCode
2456808
Title
What are the important factors affecting prognostics?
Author
Miller, J.R. ; Grimes, Justin H.
Author_Institution
Sci. Appl. Int. Corp., Huntsville, AL, USA
fYear
2002
fDate
2002
Firstpage
801
Lastpage
807
Abstract
Trend analysis mathematics and data interactions are studied. Investigation of the tolerances on the projection of the linear trend line is undertaken. Importance of the number of measurements is discussed. It is shown that the best estimate of time to exceedance requires 8 to 9 measurements. Several examples of test data are presented. The relationship between requirements and test equipment performance is given. Two different methods to determine accuracy of prediction are discussed. Some methods of trend analysis have only limited ability and experience with accuracy of prediction questions. Based on experience with vehicle testing the major limitation has been non-repeatability of data.
Keywords
test equipment; tolerance analysis; vehicles; linear trend; prediction accuracy; prognostics; test equipment; tolerance analysis; trend analysis; vehicle testing; Accuracy; Coolants; Data analysis; Engines; Mathematics; Temperature; Test equipment; Testing; Time measurement; Vehicles;
fLanguage
English
Publisher
ieee
Conference_Titel
AUTOTESTCON Proceedings, 2002. IEEE
ISSN
1080-7725
Print_ISBN
0-7803-7441-X
Type
conf
DOI
10.1109/AUTEST.2002.1047961
Filename
1047961
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