Development of the combined method for evaluating and controlling the reliability indicator «probability of failure-free switching» of a radio technical complex

Abstract

The operation of a radio-technical complex based on a technical condition is represented by cycles. Each cycle implies control over a limiting state in order to make timely and informed decisions on managing the operation of a radio-technical complex. That should resolve the task of assessing and monitoring the indicators of fault-free operation with the required accuracy and reliability based on operational observations and, if necessary, special tests that could minimize the cost of special tests. Given the introduction for a radio-technical complex of the repeated application of a new indicator of fault-free operation «the probability of trouble-free switching», a combined method of its evaluation and control has been developed. This method is a set of known and developed criteria, models, methods, and schemes that determines the sequence of their application for joint evaluation and control of this indicator. The criteria for verifying the uniformity of data on the operational observations and special tests for the fault-free operation of a radio-technical complex have been defined, as well as the corresponding models for assessing the one-sided lower confidence boundaries of the indicator under consideration, and the methods to control it. The devised method makes it possible to derive estimates of the probability of trouble-free switching, as well as the magnitudes of the observed risks of decisions being made with acceptable accuracy and reliability. The results of modeling the devised combined method helped obtain the accuracy and reliability of its estimates and the observed risks of controls carried out. Recommendations have been compiled for applying the method to address the challenges of joint assessment and control of the probability of trouble-free switching of the considered complexes

Development of an experimental-estimation method for estimating indices of residual life of a radio technical complex

“…Reduction of operating and repairing costs of present-day radio technical complexes (RECs) at a given efficiency of their operation is possible through the use of maintenance and repair methods according to their technical condition [1].…”

“…Analysis important for making timely decisions on repair or decommissioning. At the same time, the REC is considered as an object of repeated use with a complex mode of operation characterized by indices of reliability "mean time between failures" (MTBF) and "probability of failure-free switching" (PFFS) [1,2].…”

“…In addition, the REC belongs to restorable and repairable objects and, accordingly, it must be characterized by residual life indices "average residual life". The REC is operated in cycles which requires a solution to the problem of estimating the reliability indices (RI) with the required accuracy and reliability and their results are used to control the operation [1,2].…”

“…Special tests mean the tests for reliability organized specifically for the purpose of estimating their indices [1,3]. At the same time, quantitative estimates of these indices are used to make a decision on the limiting (nonlimiting) state of the REC and plan measures to manage its operation and repair.…”

“…At the same time, it is necessary to ensure specified accuracy and reliability of assessment of these indices while minimizing the cost of special tests. Only the problem of estimating and controlling the REC reliability index was solved in [1] on the assumption of the need for a subsequent solution to the problem of estimating the indices of residual life.…”