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Relevance In the process of developing the technology for manufacturing and operating multilayer large-sized objects used in aviation, shipbuilding, railway transport, chemical engineering, automotive and many other industries (for example, multilayer large-sized shells, main pipelines, etc.), there arises the need for operational continuous non-destructive testing of structures large areas to determine the thickness and continuity of the connection of layers with subsequent refinement of the identified defects parameters. Aim of research Development of the theory and means for diagnosing of multilayer large-sized objects technical condition to increase the reliability of their diagnostics results. Research methods To achieve the aim, analytical methods for studying the electromagnetic field, the theory of differential and integral calculus, numerical and computer modeling using software tools were used. Results A mathematical model of the electromagnetic field distribution in the multilayer structure of multilayer large-sized objects, as well as an original control device for multilayer large-sized objects, which allows continuous monitoring of their technical condition, have been developed.

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