G.S. Sаdykhov1, V.P. Savchenko2, S.S. Kudryavtseva3

1,3 Bauman Moscow State Technical University (Moscow, Russia)
2 JSC «Academician A.L. Mints Radiotechnical Institute» (Moscow, Russia)

In the tasks of extending the useful life of non-restorable items, the amount of observed items is very limited. Therefore, the results of production tests are added to the observed sample volume of the items. Then there is a problem of estimating the mean residual operating life of items with large sample volumes of items. At the same time, the laws of operating life allocation of the studied items of the same type may be different.

Derive a formula for calculating the lower confidence limit of the mean residual operating life of items for a given confidence probability for any law of operating life consumption with large sample volumes of items.

The lower confidence limit of the mean residual operating life of non-restorable items has been established for a given confidence probability based on the results of a large volume of observations during testing and operation. The established boundary is valid for any law of operating life consumption of non-restorable items.

The established lower confidence limit of the mean residual operating life makes it possible to find the extended useful life of non-restorable items beyond the assigned levels. An example of calculating the lower confidence limit of the mean residual operating life for a given confidence probability is given.

Sаdykhov G.S., Savchenko V.P., Kudryavtseva S.S. The lower confidence limit of the mean residual operating life of items with large sample volumes. Science Intensive Technologies. 2023. V. 24. № 1. P. 24−30. DOI: https://doi.org/10.18127/j19998465-202301-03 (in Russian)

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