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Accelerated life test is to shorten the test cycle with increasing test stress life test if you use it, the general reliability of the product can be quickly assessed out quickly identify the cause of failure, high reliability and long life reliability assessment made possible .70, accelerated life testing entering the country, immediately aroused the interest of the engineering and statisticians side edge research, electronic, mechanical, instrumentation and other industries for 20 years, has accumulated a lot of practical experience in the accelerated life test , made a number of new accelerated life test model and data processing methods, these have greatly enriched the theory and method of accelerated life testing. accelerated life testing type, commonly used is the following three categories .1. constant stress accelerated life testing, referred to as an accelerated life test it is to elect a group of accelerated stress level, for example,, ...,, they are higher than normal stress level, generally there lt; lt; ... lt; lt;, then divided into a number of samples groups, each group in an accelerated stress level life test, until the groups have a certain number of products lapses .2 step stress accelerated life test, referred to as step - stress, it is also the first selected a group of accelerated stress horizontal, ..., they are higher than the normal stress level, the start of the test, life test is carried out to a certain number of samples are placed under stress level after a period of time, such as hours, the stress is increased to the unexpired sample to proceed under stress life test so continue until a certain number of the sample lapsed .3. progressive stress accelerated life test, referred to as stress life tests plus with step-by-step test is basically the same, the difference is only that they applied accelerated stress level will rise continuously over time the most simple, straight up. stress life tests stress change, failure comes, it is the implementation of the Accelerated test requires specialized equipment control stress levels and recording equipment tracking of product failure, there is no such device, Accelerated test difficult to implement the above three applications, there are a number of successful examples of accelerated life test, but an accelerated life test instance. an accelerated life test method is simple, data processing method is also more successful. although it required test time is not the shortest, but still double than the average life test to shorten the time, it is often the actual use of an accelerated life test has also developed a national standards. No. GB2689.1 ~ 4-81. Bayesian statistical analysis methods of statistical inference difficulty lies in the posterior of the calculation of the marginal distributions, in many cases it is difficult, or even impossible to get the posterior marginal distributions analytical expressions sometimes may be resolved but the result is quite complex and not easy to application and promotion. obey the lognormal distribution conditions, the life of the product, constant stress accelerated life test in this case of the non-censored data of Bayesian statistical analysis of the data, and the use of Gibbs sampling iterative algorithm to solve extremely complex after inspection marginal distributed computing text is divided into six parts:
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