期刊
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
卷 222, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2022.107237
关键词
Nonlinear vibration isolation; Tunable high-static-low-dynamic stiffness; Orthogonal six-DOFs; Frequency response; Dynamical experiment
资金
- National Natural Science Foundation of China [11872037, 11872159, 11572182]
- Innovation Program of Shanghai Municipal Education Commission [2017-01-07-00-09-E00019]
An orthogonal six-DOFs vibration isolation system with tunable high-static-low-dynamic stiffness characteristics is studied using experimental and analytical methods. The results show that the isolation frequency range is widened with increasing controlled current, and increasing the electromagnetic coefficient and decreasing the onset distance can decrease the isolation start frequency.
In order to suppress the low-frequency vibration of a high-precision instrument, an orthogonal six-DOFs vibration isolation system with tunable high-static-low-dynamic stiffness characteristics is studied using experimental and analytical methods. The current-controlled magnetic spring is used to obtain the tunable orthogonal sixDOFs HSLDS, which adapts to different suspended masses. A dynamical model of electromagnetic nonlinear vibration isolation system with orthogonal six-DOFs is developed to investigate the experimental results. Moreover, the harmonic balance analysis together with arc-length continuation are used to analyze the frequency response function of force transmissibility. Both experimental and analytical results are shown that as a controlled current increases, the isolation frequency range is widened. Parametric studies of this study demonstrate that increasing the electromagnetic coefficient and decreasing the onset distance can decrease the isolation start frequency. It is obtained that proper parameter is necessary to achieve broadband frequency range, and this article also provides a relevant explanation of these results.
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