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Statistical analysis of failure data on controllers and ssme turbine blade failures
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Patil, S. A. |
| Copyright Year | 1986 |
| Description | The expressions for the maximum likelihood functions are given when the failure data are censored at a given point or at multiple points, or when the data come in groups. Different models applicable to failure data are presented with their characteristics. A graphical method of distinguishing different models by using cumulative hazard fucnction is discussed. For the failure data on controllers the model is determined by cumulative hazard function and chi-square goodness of fit. Using the Weibull Model the maximum likelihood estimators of the shape parameter and the failure rate parameter are obtained. The confidence intervals, meantime between failures, and B1 are determined. Similarly, for the data on Space Shuttle Main Engine (SSME) blade failures the maximum likelihood estimators are obtained for the Weibull parameters. The variances, confidence intervals, meantime between failures, and reliability are determined. The analysis is performed under assumption of grouped data as well as randomly placed data. |
| File Size | 619545 |
| Page Count | 27 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870007343 |
| Archival Resource Key | ark:/13960/t75t8hr0n |
| Language | English |
| Publisher Date | 1986-11-01 |
| Access Restriction | Open |
| Subject Keyword | Controllers Statistical Analysis Turbine Blades Failure Analysis Space Shuttle Main Engine Hazards Maximum Likelihood Estimates Probability Density Functions Weibull Density Functions Goodness of Fit Mtbf Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
