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Optimal design and equivalency of accelerated life testing plans
Descriptive
TypeOfResource
Text
TitleInfo
(ID = T-1)
Title
Optimal design and equivalency of accelerated life testing plans
Identifier
ETD_2845
Identifier
(type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056876
Language
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(authority = ISO639-2);
(type = code)
eng
Genre
(authority = marcgt)
theses
Subject
(ID = SBJ-1);
(authority = RUETD)
Topic
Industrial and Systems Engineering
Subject
(ID = SBJ-2);
(authority = ETD-LCSH)
Topic
Accelerated life testing
Subject
(ID = SBJ-3);
(authority = ETD-LCSH)
Topic
Product design
Subject
(ID = SBJ-4);
(authority = ETD-LCSH)
Topic
Manufactures
Subject
(ID = SBJ-5);
(authority = ETD-LCSH)
Topic
Weibull distribution
Abstract
(type = abstract)
Accelerated Life Testing (ALT) is an efficient approach to obtain failure observations by subjecting the test units to stresses severer than design stresses and utilize the test data to predict reliability at normal operating conditions. ALT plans under multiple stresses needs to be designed to resemble the normal operating conditions and obtain useful failure observations for accurate reliability prediction. However, to date there is little research into the theory of planning ALT for reliability prediction with multiple stresses. Multiple stresses can result in a large number of stress-level combinations which presents a challenge for implementation. We propose an approach for the design of ALT plans with multiple stresses using Latin hypercube design (LHD) and demonstrate the proposed method with examples based on actual tests. The obtained optimal test plans are compared with those based on full factorial design. The comparison shows that ALT based on LHD not only increases the accuracy of reliability prediction significantly but also reduces the test duration dramatically. ALT under Type-I and Type-II censoring has been extensively investigated. We generalize the one stage censoring to multi-stage progressive censoring, where the surviving test units are removed at intermediate stages other than the final termination of the test. This procedure further minimizes the test time and cost. We also combine the progressive censoring scheme with competing risk when test units experience different failure modes to investigate general, practical and optimal ALT plans. ALT is usually conducted under constant-stresses which need a long time at low stress levels to yield sufficient failure data. Many stress loadings, such as step-stresses obtain failure times faster than constant-stresses but the accuracy of reliability predictions based on such loadings has not yet been investigated. We develop test plans under different stress applications such that the reliability prediction achieves equivalent statistical precision to that of the constant-stress. The research shows indeed there are such equivalent plans that reduce the test time, minimize the cost and result in the same accuracy of reliability predictions.
PhysicalDescription
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electronic resource
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xii, 176 p. : ill.
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application/pdf
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text/xml
Note
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Ph.D.
Note
(type = bibliography)
Includes bibliographical references
Note
(type = vita)
Includes vita
Note
(type = statement of responsibility)
by Yada Zhu
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Zhu
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Yada
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Yada Zhu
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Coit
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David W
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internal member
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Advisory Committee
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David W Coit
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Jeong
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Myong-K
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internal member
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Advisory Committee
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Myong-K Jeong
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NamePart
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Pham
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(type = given)
Hoang
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internal member
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Hoang Pham
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Hung
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Ying
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Advisory Committee
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Ying Hung
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NamePart
Rutgers University
Role
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degree grantor
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Graduate School - New Brunswick
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school
OriginInfo
DateCreated
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2010
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2010-10
Place
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xx
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Title
Rutgers University Electronic Theses and Dissertations
Identifier
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ETD
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TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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NjNbRU
Identifier
(type = doi)
doi:10.7282/T3XP74N6
Genre
(authority = ExL-Esploro)
ETD doctoral
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Rights
RightsDeclaration
(AUTHORITY = GS);
(ID = rulibRdec0006)
The author owns the copyright to this work.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
RightsHolder
(ID = PRH-1);
(type = personal)
Name
FamilyName
Zhu
GivenName
Yada
Role
Copyright Holder
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DateTime
2010-09-04 12:37:57
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Name
Yada Zhu
Affiliation
Rutgers University. Graduate School - New Brunswick
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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Embargo
DateTime
2010-10-31
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after October 30th, 2012.
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ETD
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application/x-tar
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2140160
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