NDLI: Reliability and interval estimation of type-H censored electrical insulation data

Content Provider	IEEE Xplore Digital Library
Author	Shetty, P.K. Ramu, T.S.
Copyright Year	2004
Description	Author affiliation: Dept. of High Voltage Eng., Indian Inst. of Sci., Bangalore, India (Shetty, P.K.; Ramu, T.S.)
Abstract	The paper presents some analytical results pertaining to the estimation of variance of the parameters of a three parameter Weibull distribution (3pW) under type-II censoring. Ageing failure data acquired on an insulating material of considerable application potential has been used to demonstrate the results. The point estimates of the parameters of failure time distribution are obtained using maximum likelihood estimation method. The true value of the variance of the ML estimates for 3pW are hard to obtain and the situation becomes more complex when the data is censored. The asymptotic variance can be obtained by taking the inverse of the Fisher information matrix, the computation of which is quite involved in the case of censored 3-pW data. Approximations are reported in the literature to simplify the procedure. The authors have considered the effects of such approximations on the precision of variance estimates when the sample size is greatly limited by practical difficulties in obtaining the authentic data. A detailed study of the effect of censoring on the ML estimates, under this condition is also presented.
Starting Page	402
Ending Page	405
File Size	274763
Page Count	4
File Format	PDF
ISBN	0780384474
ISSN	1089084X
DOI	10.1109/ELINSL.2004.1380614
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectrics and electrical insulation Thermal stresses Parameter estimation Failure analysis Data analysis Probability Costs Voltage Data engineering Reliability engineering
Content Type	Text
Resource Type	Article

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