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On the nonlinear dynamic model of open‐type constant flow hydrostatic bearings
Author(s) -
Mao Kuanmin,
Du Yikang,
Li Bin,
Gan Shiyu,
Jin Lan
Publication year - 2018
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1389
Subject(s) - hydrostatic equilibrium , displacement (psychology) , mechanics , nonlinear system , flow (mathematics) , compressibility , control theory (sociology) , constant (computer programming) , materials science , physics , computer science , psychology , control (management) , quantum mechanics , artificial intelligence , psychotherapist , programming language
This paper presents experimental and theoretical studies used to assess the dynamic performance of open‐type constant flow hydrostatic bearings. A nonlinear dynamic model accounting for the compressibility effect, the squeeze effect, and the hydrostatic effect of hydrostatic fluid for the analytical perdition of the step response is proposed. Moreover, an innovative point‐to‐point contact step excitation setup is designed. In addition, a test rig is developed to measure the step response of the hydrostatic bearings by removing the imposed displacement within 0.0002 second. The experimental results are in good agreement with the theoretical results. The results show that the maximum dynamic displacement is twice the imposed displacement. Furthermore, the settling time of the step response is related to the inlet flow rate, irrespective of the imposed displacement.