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A retrospective analysis of the existing operation models of complex technical systems is conducted. The paper describes the failure and degradation models of complex technical systems assuming monotonic and non-monotonic diffusion distributions, as well as a failure and degradation model of these systems assuming a three-parameter diffusion distribution. Failure and degradation models are proposed to be used together with the classical model of E. Sychev and more complex models created on its basis. In addition, a set of models representing the operation of complex technical systems was developed. The first model is designed for systems whose service life is fully recovered during repair and is described by a system of 21st-order linear algebraic equations, with four degrees (groups) of system degradation taken into account. A functional dependence of steady-state availability on the verification intervals of measuring instruments is plotted for complex technical systems from different degradation groups. Described by a system of 24th-order linear algebraic equations, the second operation model of complex technical systems, whose service life cannot be fully recovered during repair, enables the representation of the main stages in the lifecycle of a pool of complex technical systems, which includes pool upgrade through the procurement of new and modernization of existing systems. The developed operation models provide a means to calculate the optimal intervals between verifications and tolerances for the monitored parameters in different degradation groups of complex technical systems, thus ensuring maximum steady-state availability. These models can be used to classify complex technical systems in order to establish requirements for their metrological support, as well as to calculate technical and economic development indicators for a pool of such systems. The proposed models also provide the basis for a set of applied programs designed to model and optimize stages in its lifecycle. [ABSTRACT FROM AUTHOR]

The construction of operation models for complex technical systems is considered. It is shown that the issues of optimizing systems with metrological support are not fully covered in the literature. We propose a model for managing the processes of operation and updating the fleet of measuring equipment related to several degradation groups. A functional dependence of the stationary readiness coefficient on the metrological parameters of measuring equipment is built — the intervals between certifications, relative operating tolerances for monitored parameters and relative measurement errors, as well as on organizational, technical and engineering parameters. The developed model makes it possible to calculate the optimal (rational) parameters of operation and renewal of the measuring equipment fleet. The model can be used in the classification of complex technical systems in order to set requirements for their metrological support. [ABSTRACT FROM AUTHOR]