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Statistical Analysis of Space-flight Electrical Connector for Vibration Reliability

Author: WeiWen
Tutor: ChenWenHua；LuXianBiao；LiLiXin
School: Zhejiang University
Course: Mechanical Design and Theory
Keywords: The electrical connector Vibration Reliability Statistical Analysis
CLC: TB114.3
Type: Master's thesis
Year: 2002
Downloads: 395
Quote: 11
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Abstract


In this paper, Y11X-2221 round low-frequency electrical connectors for the study of reliability test methods and test data, statistical analysis of the system, in-depth research. First, the development of domestic and reliability study the history and current status of reliability test methods and trends, reliability, statistical analysis methods and problems, as well as the reliability of aerospace electrical connector status and problems were reviewed and comments. Secondly, through the electrical connector failure mechanism analysis, combined with the theory of probability and statistics, the establishment of an electrical connector in the vibration reliability under stress statistical model, namely the inverse power law - Weibull model for the reliability of the electrical connector Test program development and statistical analysis of test data foundation. Third, by censoring, timed testing under a variety of experimental data analysis of statistical methods, the use of Monte Carlo simulation method is best linear unbiased estimation, the best linear invariant estimates, a simple linear unbiased estimation, minimum The median rank squares estimation and maximum likelihood estimation accuracy of statistical analysis methods were compared and analyzed. In the absence of bias and minimum mean square error sense, the results of the above estimation method pros and cons of censoring, timed testing the reliability analysis of experimental data foundation. Fourth, the proposed and studied failure data types and data types DOOF under electrical connector reliability analysis method is proposed to incomplete Beta distribution as a prior distribution, ultra-parameters [0,1] uniformly on As a prior distribution of failure probability distribution of hierarchical Bayes methods, combined with the weighted least squares method to solve the product in the absence of failure data and reliability under DOOF data analysis problems. Fifth, using maximum likelihood estimation method and the weighted least squares method to electrical connectors accelerated life test data were statistically analyzed, and reliability characteristics of the electrical connector estimate of the amount to verify the reliability of the statistical model of the electrical connector and reliability analysis method under DOOF data correctness. Finally, the text of the content of the summary, and pointed out the electrical connector reliability test and analysis of the need for further research content and the Foundation of the next stage of work.

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CLC: > Industrial Technology > General industrial technology > Engineering and basic science > Engineering Mathematics > The application of probability theory, mathematical statistics > Reliability theory
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