An Ultra-low Frequency Micro-vibration Testing Platform Based on the Strain-resistance Effect

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (24) : 77-81.

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An Ultra-low Frequency Micro-vibration Testing Platform Based on the Strain-resistance Effect

Chen Jiang-pan，Cheng Wei，Xia Ming-yi

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Abstract

In order to measure the micro-vibration of SADA (Solar Array Drive Assembly) in low and ultra-low frequency zone caused by electromechanical coupling, a six-component testing platform based on the strain-resistance effect is invented, whose response characteristic in low frequency zone is outstanding and installation interface is flexible. The working principle and dynamic calibration method of this platform is shown in detail. In order to assess the performance of this testing platform, linearity examination, natural frequency testing and dynamic testing error examination are done. The results show that: linearity error of the eight force sensors is within ±3.4% under the action of external force within 100N; there is no natural frequency within 100Hz, so that the micro-vibration signal would not be modulated; in frequency domain (0-100Hz), dynamic testing error of the six-component is within ±9.6%; in frequency domain (0-100Hz), testing resolutions of the three forces and three moments can reach 0.0lN and 0.001N.m respectively.

Key words

ultra-low frequency / micro-vibration / six-component / dynamic calibration

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Chen Jiang-pan;Cheng Wei;Xia Ming-yi. An Ultra-low Frequency Micro-vibration Testing Platform Based on the Strain-resistance Effect[J]. Journal of Vibration and Shock, 2014, 33(24): 77-81