Limiting State Criteria for Mobile Metrological Complexes

Mobile metrological complexes operate primarily outdoors, under high-intensity operational loads and constantly changing application conditions. A key factor in ensuring their functionality is the well-founded determination of their residual service life.
However, the criteria for assessing the limiting state of the working standards and measuring instruments within them are not always fully evident for justifying the residual service life of mobile metrological complexes. While a significant number of scientific publications address the metrological reliability of such measuring instruments, the issues of defining their limiting state and assessing the residual service life of mobile metrological complexes are not fully resolved and require further development.
The presented study aimed to justify the criteria for the limiting state of mobile metrological complexes based on a risk-oriented approach.
Risks were identified through an analysis of the design and functional features of mobile metrological complexes across the triad of subsystems: transport, measurement, and support. Mathematical calculations of the indicators and criteria for the limiting state of mobile metrological complexes were performed. These indicators and criteria are based on accounting for the level of risk from latent metrological failures of measuring instruments during inter-verification intervals.
An approach to determining risk indicators has been substantiated, taking into account the dynamic variations in the metrological characteristics of working standards and measuring instruments during operation. Indicators and criteria for the onset of the limiting state of mobile metrological complex subsystems have been established, along with indicators for assessing their service life and residual resource. The core mathematical relationships for calculating these indicators have been defined, considering potential risks from latent metrological failures.
The conclusions presented in the article are intended for metrologists involved in the daily operation of mobile metrological complexes. The indicators, criteria, and characteristics established in this study can be used to assess the condition, justify decisions, and extend the service life of mobile metrological complexes, while considering potential risks from latent metrological failures.

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