Кафедра фізики і електротехніки

Постійне посилання зібрання

https://elar.khmnu.edu.ua/handle/123456789/577

Переглянути

Перегляд Кафедра фізики і електротехніки за Ключові слова "eccentricity"

Зараз показуємо 1 - 2 з 2
  • Ескіз
    Документ
    Balancing of turbomachine rotors by increasing the eccentricity identification accuracy
    (Mechanika, Kaunas, 2016) Goroshko, Andrii; Royzman, Vilen; Ostaševičius, V
    The article presents the results of research aimed at improving the identification of eccentricities by ensuring the stability of solutions of linear discrete inverse problems. The results of the application of scaling factors of systems with a view to reducing their dependence are suggested. Identi-fied eccentricities imbalances and angles of their location allowed to balance the rotor turbopump unit TNA-150 and reduce the maximum deflection of the rotor shaft in the range of 2000-18000 rpm 6 times, the amplitude of vibra-tion supports - 4 times, the static tension in the material of the shaft - 3.5 times, and dynamic tension- 3 times. The use of linear filtering LSEs based on the PCA method, has sig-nificantly reduced the LSE scattering and accurately iden-tify the eccentricities of the compressor rotor of aircraft en-gine AI-20.
  • Ескіз
    Документ
    Metaphysical Modeling of Rotor dynamics Motor Spindle with magnetic Eccentricity
    (Israeli independent Academy of development of Science, 2026-03) Goroshko, Andrii; Zembytska, Maryna
    The paper presents a metaphysical model of the rotor dynamics of an asynchronous motor spindle that accounts for the effect of magnetic eccentricity. The study proposes a new approach to modeling unbalanced magnetic pull (UMP) based on a variable mutual inductance of the magnetizing circuit instead of the classical Maxwell stress tensor method. Analytical dependences between the air-gap eccentricity, magnetizing inductance, and UMP components are derived, and a modified Simscape/Simulink model of the asynchronous machine is implemented to simulate these relationships. The simulation results demonstrate the influence of magnetic eccentricity on the electromagnetic torque, stator current spectrum, and rotor speed. The proposed model provides a practical tool for diagnosing eccentricity-related faults and predicting vibration behavior in motor spindles