Modeling and analysis of a novel multi-directional micro-vibration isolator with spring suspension struts

2021 ◽  
Author(s):  
Tao Yang ◽  
Qingjie Cao
Keyword(s):  
Vibration Isolator ◽  
Modeling And Analysis ◽  
Spring Suspension ◽  
Micro Vibration

Modeling and analysis of a viscoelastic micro-vibration isolation and mitigation platform for spacecraft

2017 ◽  
Vol 24 (18) ◽  
pp. 4337-4352 ◽  
Author(s):  
Chao Xu ◽  
Zhao-Dong Xu ◽  
Xing-Huai Huang ◽  
Ye-Shou Xu ◽  
Teng Ge
Keyword(s):  
Energy Dissipation ◽  
Analytical Model ◽  
Viscoelastic Material ◽  
Vibration Isolation ◽  
Dynamic Properties ◽  
Coupled System ◽  
Mathematic Model ◽  
Experimental Results ◽  
Modeling And Analysis ◽  
Micro Vibration

A new viscoelastic micro-vibration isolation and mitigation platform is proposed to reduce disturbances generated by flywheels on board spacecraft. Firstly, property tests on the high-damping viscoelastic material used in the micro-vibration isolation and mitigation element are conducted. Experimental results show that the developed viscoelastic material has better energy dissipation capability under micro-vibration conditions. A mathematic model is employed to describe the dynamic properties of the high-damping viscoelastic material and is used to model the isolation and mitigation element. Secondly, a viscoelastic micro-vibration isolation and mitigation platform, which consists of four elements, is proposed and the analytical model of the coupled system that consists of the platform with flywheel is established. Finally, the isolation and mitigation performances of this micro-vibration isolation and mitigation platform are analyzed and discussed. The results show that the isolation and mitigation platform can effectively reduce the micro-vibration disturbances induced by the flywheel.

Modeling and analysis of piezoelectric folded-beam isolator for attenuating micro-vibration in spacecraft

2018 ◽  
Vol 07 (01n02) ◽  
pp. 1850013 ◽  
Author(s):  
Yajun Luo ◽  
Yingqi Zhang ◽  
Xu Zhang ◽  
Xing Gao ◽  
Kun Jia ◽  
...  
Keyword(s):  
Vibration Isolation ◽  
Transfer Functions ◽  
Low Frequency ◽  
Relative Displacement ◽  
Fe Model ◽  
Feedback Controls ◽  
Isolation System ◽  
Modeling And Analysis ◽  
Mixed Responses ◽  
Micro Vibration

Design, modeling, and analysis of an intelligent flexible isolation system for attenuating low-frequency micro-vibration are presented. The isolator consists of a payload platform, a supporting platform and four folded-beams with surface-bonded macro-fiber composites (MFCs). To accurately analyze the system performance, a piezoelectric finite element (FE) model is built and validated by the modal analysis results derived from ANSYS. This paper presents an attempt to widen the low-frequency isolation range for the micro-vibration using a modal frequency shift approach. The transfer functions of the active isolation system with different feedback controls are derived based on an FE model, in which feedback signals can be absolute and relative accelerations, absolute and relative displacement, relative velocity, and mixed responses. According to the numerical results, the expected performance of low-frequency vibration isolation can be easily achieved, especially by a kind of mixed responses feedback method. The time-domain simulations also show that the proposed piezoelectric isolation system exhibits a good isolation performance, endowing them with great potential for the micro-vibration restrain in aerospace application.

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