YANG Yuebin, ZUO Wenlong, BAO Yanxiang, et al. Delay Induced Error Analysis for the Pendulum based Mechanical Spectra Instrument in the Forced Vibration Mode[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2012,51(5):132-136.
YANG Yuebin, ZUO Wenlong, BAO Yanxiang, et al. Delay Induced Error Analysis for the Pendulum based Mechanical Spectra Instrument in the Forced Vibration Mode[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2012,51(5):132-136.DOI:
The systematical error of the pendulum-based mechanical spectra instrument is analyzed in the forced vibration mode
it is found that the error mainly originates from both mechanical and circular delays enlarging the phase lag for the strain behind the stress. Furthermore
a scheme to measure these systematic delays and correct the phase lag is proposed
which greatly improves the precision for both the internal friction of solid and the viscosity of liquid.