|Title of the article||
PROBABILITY EVALUATION OF FAILURE-FREE OPERATION BASED ON RESULTS OF TESTS WITHOUT FAILURE
Mikhaylov Viktor Sergeevich, lead engineer, Central Research Institute of Chemistry and Mechanics named after D. I. Mendeleev (115487, 16а Nagatinskaya street, Moscow, Russia), Mvs1956@list.ru
In the modern production of highly reliable, unique, complex products, the usual situation in which it is necessary to obtain an estimate of the probability of failure-free operation (PFO) based on tests that did not give failures has become. In this case, a test plan of type NBT is usually used, where N is the number of subjects of the same type; T – operating time (the same for each product); В – the characteristic of the plan, meaning that the working capacity of the product after each failure during the test period is restored. If the operating time is obeyed to the exponential distribution law with the parameter T0 (mean time to failure), the calculated value of the PFO for a given time (t) will be determined by the equality Р0(t,T0) = exp(–t/T0). The purpose of the article is to find a tool that will objectively judge (from the point of view of the effectiveness of the proposed evaluations) the proposed possibilities to estimate the PFO value different from zero and one by the results of tests that did not fail.
mean operating time to failure, probability of failure-free operation, exponential distribution, test plan, point estimates
Дата обновления: 09.06.2017 09:57