Author: Ronald D. FlackPublisher:
ISBN:
Category :
Languages : en
Pages : 126
Book Description
Experimental Data analysis of the space shuttle main engine
Author: Ronald D. FlackExperimental data analysis of the space shuttle main engine - high pressure oxidizer and fuel turbopumps
Author: Edgar J. GunterExperimental Uncertainty Survey and Assessment. Space Shuttle Main Engine Testing
Author: National Aeronautics and Space Adm NasaPublisher: Independently Published
ISBN: 9781792710025
Category :
Languages : en
Pages : 36
Book Description
An uncertainty analysis and assessment of the specific impulse determination during Space Shuttle Main Engine testing is reported. It is concluded that in planning and designing tests and in interpreting the results of tests, the bias and precision components of experimental uncertainty should be considered separately. Recommendations for future research efforts are presented. Coleman, Hugh W. NASA-CR-184297, NAS 1.26:184297 NAS8-38609...
Reliability Growth Modeling Analysis of the Space Shuttle Main Engines Based Upon the Weibull Process
Author: National Aeronautics and Space Adm NasaPublisher:
ISBN: 9781730838668
Category :
Languages : en
Pages : 68
Book Description
The Weibull process, identified as the inhomogeneous Poisson process with the Weibull intensity function, is used to model the reliability growth assessment of the space shuttle main engine test and flight failure data. Additional tables of percentage-point probabilities for several different values of the confidence coefficient have been generated for setting (1-alpha)100-percent two sided confidence interval estimates on the mean time between failures. The tabled data pertain to two cases: (1) time-terminated testing, and (2) failure-terminated testing. The critical values of the three test statistics, namely Cramer-von Mises, Kolmogorov-Smirnov, and chi-square, were calculated and tabled for use in the goodness of fit tests for the engine reliability data. Numerical results are presented for five different groupings of the engine data that reflect the actual response to the failures. Wheeler, J. T. Marshall Space Flight Center...
Experimental data analysis of subsynchronous excitation of the space shuttle main engine high pressure oxidizer turbopump
Author: John D. HeinzmannIdentification and Interpretation of Patterns in Rocket Engine Data
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722288402
Category :
Languages : en
Pages : 36
Book Description
A prototype software system was constructed to detect anomalous Space Shuttle Main Engine (SSME) behavior in the early stages of fault development significantly earlier than the indication provided by either redline detection mechanism or human expert analysis. The major task of the research project is to analyze ground test data, to identify patterns associated with the anomalous engine behavior, and to develop a pattern identification and detection system on the basis of this analysis. A prototype expert system which was developed on both PC and Symbolics 3670 lisp machine for detecting anomalies in turbopump vibration data was checked with data from ground tests 902-473, 902-501, 902-519, and 904-097 of the Space Shuttle Main Engine. The neural networks method was also applied to supplement the statistical method utilized in the prototype system to investigate the feasibility in detecting anomalies in turbopump vibration of SSME. In most cases the anomalies detected by the expert system agree with those reported by NASA. On the neural networks approach, the results are given the successful detection rate higher than 95 percent to identify either normal or abnormal running condition based on the experimental data as well as numerical simulation. Lo, C. F. and Wu, K. and Whitehead, B. A. Unspecified Center NAG8-166...
Space Shuttle Main Engine
Author: Robert E. BiggsPublisher: American Astronautical Society
ISBN:
Category : Science
Languages : en
Pages : 284
Book Description
The first ten years : The engine -- The beginning -- The requirements -- The obstacles -- The goals -- The first flight -- The second decade : The glory of Columbia -- Full power level moratorium -- Full power level certification -- Program reassessment and realignment -- Phase I flight program -- The tragedy of Challenger -- Return to flight -- Building margin -- Beyond the second decade.
Determination of Uncertainties for the New Ssme Model
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723556708
Category :
Languages : en
Pages : 246
Book Description
This report discusses the uncertainty analysis performed in support of a new test analysis and performance prediction model for the Space Shuttle Main Engine. The new model utilizes uncertainty estimates for experimental data and for the analytical model to obtain the most plausible operating condition for the engine system. This report discusses the development of the data sets and uncertainty estimates to be used in the development of the new model. It also presents the application of uncertainty analysis to analytical models and the uncertainty analysis for the conservation of mass and energy balance relations is presented. A new methodology for the assessment of the uncertainty associated with linear regressions is presented. Coleman, Hugh W. and Hawk, Clark W. Unspecified Center NASA-CR-201137, NAS 1.26:201137 NAS8-38609...
Space Shuttle Main Engine Structural Analysis and Data Reduction/Evaluation. Volume 1
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722754990
Category :
Languages : en
Pages : 86
Book Description
Using the ANSYS finite element program, a global model of the aft skirt and a detailed nonlinear model of the failure region was made. The analysis confirmed the area of failure in both STA-2B and STA-3 tests as the forging heat affected zone (HAZ) at the aft ring centerline. The highest hoop strain in the HAZ occurs in this area. However, the analysis does not predict failure as defined by ultimate elongation of the material equal to 3.5 percent total strain. The analysis correlates well with the strain gage data from both the Wyle influence test of the original design aft sjirt and the STA-3 test of the redesigned aft skirt. it is suggested that the sensitivity of the failure area material strength and stress/strain state to material properties and therefore to small manufacturing or processing variables is the most likely cause of failure below the expected material ultimate properties. Berry, David M. and Stansberry, Mark Unspecified Center...
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