| Summary: | Background. The term "optical coherence tomography" appeared many decades ago in works devoted
to expanding the capabilities of low-coherence reflectometry for imaging the internal structure of turbid media. This
term, despite not exactly matching the accepted concept of tomography (layer-by-layer image restoration by solving an
inverse mathematical problem), is now recognized throughout the world. The purpose of the study is to analyze methods
for diagnosing nanomaterials in hybrid technologies for forming parts in the transport engineering system (gas turbine
motor-car trains made from new materials). Materials and methods. Analysis of diagnostic methods has shown that
some of the known methods are unsuitable, others require adaptation to nanomaterials, and a significant part can only
be determined using new methods. Results and conclusions. The work shows that the use of laser, ultrasonic, fiber-optic
diagnostic systems for nanomaterials and alloys in hybrid technologies for forming parts in a high-speed rolling stock
system will reduce investment and operating costs of high-speed railways, increase reliability while maintaining power
and dynamic characteristics trains compared to substations with diesel power plants and electric trains.
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