Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4924431 | Journal of Sound and Vibration | 2016 | 18 Pages |
Abstract
The speed fluctuation of satellite-rotary-mechanisms causes vibration of slightly different frequencies. The critical requirements of satellites need a vibration control device with high frequency resolution to suppress the vibration. This paper presents a coarse-fine adaptive tuned vibration absorber (ATVA) with high frequency resolution. The coarse-fine ATVA which simultaneously satisfies the requirements of high resolution and relatively wide effective bandwidth is capable of tracking the variable exciting frequency adaptively to suppress the vibration of the primary system. The coarse-fine ATVA is divided into a coarse tuning segment and a fine tuning segment. The coarse tuning segment is used to tune the required natural frequency in a relatively wide effective bandwidth and the fine tuning segment can achieve precise tune in a tiny-scale bandwidth. The mathematical model of the coarse tuning and the fine tuning is proposed to design the parameters of the coarse-fine ATVA. The experimental test results indicate the coarse tuning bandwidth of the coarse-fine ATVA is 8.7Â Hz to 29Â Hz and the minimum resolution of the fine tuning is 0.05Â Hz. Moreover, a significant vibration attenuation of 15dB is verified in the effective bandwidth.
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Authors
Xi Wang, Bintang Yang, Jiaxin You, Zhe Gao,