METHOD FOR CONTROL OF DYNAMICS OF RELIABILITY OF TECHNICAL SYSTEMS TAKING INTO ACCOUNT DEFECTS BY TEST RESULTS Russian patent published in 2021 - IPC G01R31/00 

FIELD: control tests methods.

SUBSTANCE: invention relates to methods for control tests of recoverable technical systems, in particular, experimental methods for evaluating and monitoring the reliability of technical systems (TS). The prototype-analogue, which is the closest in structure and functional purpose to the created technical system, is installed, for which the S_O operation period is equal to or exceeds the period necessary to confirm the requirements for the reliability of the created technical system. The number R of various types of defects is identified and recorded by periodic checks of the technical condition, inspections and observations of the analog prototype. A period of testing S_T is planned for the created technical system, which is divided into intervals S_M<S_T, after the onset of each of which, maintenance or replacement of unreliable elements in the created TS is carried out. One prototype of the technical system is tested under the influence of operational loads and external factors specified in the technical conditions for the technical system. The moments and the number of failures of the technical system due to defects are recorded, improvements are made to eliminate the identified defects, the number of defects remaining in the TS R_qocm is determined. Unbiased estimates of the dynamics of the TS failure rate and their variance are determined after the maintenance stages or after the elimination of defects. The test period is limited after the detection of each defect, a decision is made on the compliance of the failure rate with the requirements under condition or failure-free tests during the S_T period. The probabilities of the number of unmanifest defects are determined, and the decision to accept the technical system into operation is substantiated. The risk of taking the TS into operation with limited reliability due to possible defects is established.

EFFECT: possibility of reducing the volume and time of TS testing, increasing the reliability of monitoring the reliability indicators of the TS, reducing the risk of making an incorrect decision on the compliance of the TSs reliability with the requirements.

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