Abstract
The strategy and algorithm of reliability-centered maintenance of active phased array antennas are developed. The use of this strategy and algorithm makes it possible to determine the time and volumes of corrective replacements of the antenna subarray modules based on the results of predicting the reliability indexes of the array antenna as a whole. This procedure is performed as a result of consistent refinement of statistical estimates of reliability indexes of the modules during the normal operation of the phased array antenna. For processing statistical information on the failures of the array antenna modules and determining the estimates of the sample mean, upper and lower confidence limits, the method of quantiles is used. As the law of distribution of the operating time of the array antenna modules, the combination of exponential and diffusion nonmonotonic distributions is used. The example of implementation of the reliability-centered maintenance strategy and algorithm for the receive phased array antenna including 100 antenna subarrays is presented. The results of the research can allow organizing the APAR condition-based maintenance and minimizing the operating costs. Implementation of the obtained results can ensure failure-free operation of active phased array radars during operation with the timely provision of antenna subarrays with spare modules.
Highlights
Definition of tasks and strategies of condition-based maintenance of technical objects has been presented in [1,2,3,4,5,6,7,8,9,10,11,12,13,14]
The condition-based maintenance strategy is a set of rules for determining conditions and regulations for diagnosing products and making decisions on the need for their maintenance, replacement or repair based on information on the actual technical condition
The APAA reliability-centered maintenance strategy is the strategy for determining the time and volumes of corrective replacements of the antenna array modules based on the results of individual forecasting of reliability indexes of the APAA
Summary
Definition of tasks and strategies of condition-based maintenance of technical objects has been presented in [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. Only for the reliability-centered maintenance strategy, this type of control is the principal mechanism for controlling the reliability of products With this maintenance strategy, the criterion for the technical condition of the set of similar aircraft system products is the reliability level expressed by the corresponding index. The condition-based maintenance strategy is a set of rules for determining conditions and regulations for diagnosing products and making decisions on the need for their maintenance, replacement or repair based on information on the actual technical condition With this maintenance strategy, aircraft products and systems are operated (used) until the pre-failure condition. Achievement of the pre-failure level means the need for scheduled maintenance or replacement of products
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