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Information × Registration Number 0215U009414, 0113U000304 , R & D reports Title Development of methods and means of multidimensional spectral analysis of periodically non-stationary stochastic oscillations for techical diagnostics problems popup.stage_title Head Yavors'kyj Ihor, Registration Date 20-01-2016 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 The theoretical basis of cross-spectral analysis of periodically non-stationary random processes (PNRP) - mathematical models of two-dimensional vibration signals is developed. Formulas for coherent function are grounded for quantitative characteristic of stochastic relationship between vibration signals in the frequency domain. Using methods of PNRP statistic the realizations of forced oscillation of beam with the closable crack, obtained on the base of numerical solution of nonlinear differential equation of the second order, are analyzed. The spectral linear and quadratic invariants and also their representations in the Fourier series form are grounded and investigated. The physical interpretation of those quantities is provided. The special cases of vectorial PNRP are given and the structure of their spectral invariants is analyzed. Developed methods are used at observation of turbo aggregates on the Burshtyn thermal power plant, for the detection of the reasons of increased vibration appearance on the gas-compressor unit GT-6-750 of PC UKRTRANSGAZ, for the estimation of the technical state of the coal conveyor reducers on the state enterprise "Morskyi torhovyi port "YUZHNYI". With using of integral coherent function the state of the bearings of the coal conveyor electromotors on the "TIS-Ruda" is estimated. Mathematical models are built, diagnostic criteria are grounded, the sources of increased vibration appearance are defined. The upgrade of the multichannel vibrodiagnostic system VECTOR is provided, its laboratorial and full-scale tests on the enterprises in Ukraine are provided. The system is additionally fitted with the phase linear filter of the 8 order, connected with the device IMK-5 and inductive vectorial transducers. The state metrological certification if the system is provided. Product Description popup.authors Богонос Григорій Іванович Ващишин Любомир Володимирович Дзерин Оксана Юріївна Кравець Ігор Богданович Кулик Оксана Богданівна Луферчик Павло Петрович Мацько Іван Йосипович Стецько Ігор Григорович Трохим Георгій Романович Черчик Геннадій Тимофійович Шевчик Володимир Богданович Юзефович Роман Михайлович popup.nrat_date 2020-04-02 Close