TY JOUR TI Analysis of Modern Bearing Assemblies Used for High-Speed Rolling Stock and Prospects for their Development KW High-speed rolling stock KW bearing unit KW new materials KW friction coefficient reduction KW increased performance KW onboard diagnostic system for axle box units JO Bulletin of scientific research results AU Vorob'ev, A.A. AU Budyukin, A.M. AU Kondratyenko, V.G. AU Bityuckiy, N.A. AU Migulin, N.K. PY 2023 IS 2023 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"