期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 145, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2020.106959
关键词
Inertial sensor; Interferometric; Tilt-vertical coupling; Active seismic vibration isolation
资金
- CSC [201607650017]
- French Community as part of the FRIA [FC 27289]
- FRS-FNRS [F.4536.17]
The goal of this study is to demonstrate the capability to actively isolate a platform from seismic vibrations using an interferometric inertial sensor. To this purpose, a homemade high-resolution interferometric uni-axial inertial sensor (in the vertical direction) is developed and then integrated to a single-degree-of-freedom (SDOF) seismic isolation system. A theoretical study is firstly performed in order to better understand the dynamics of the system. It is found that the sensor suffers from a tilt-vertical coupling due to the influence of the gravity force if the sensor is not perfectly aligned. By taking this tilt coupling into account, a dedicated controller is designed, seeking a large vibration isolation in the frequency band of interest. Experiments are then conducted for validating the theoretical analysis and examining the vibration isolation performance. It shows a reduction of the transmitted motion of up to 60 dB in a frequency range from 0.1 Hz to 10 Hz. (C) 2020 Elsevier Ltd. All rights reserved.
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