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High Precise Internal Friction Calculation for Force Vibration Mode |
| LIANG Li-Min;FEI Guang-Tao;SHUI Jia-Peng;CUI Ping;WU Bing;CHEN Xiao-Ming;LUI Ke-Tao |
| Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Science,
Chinese Academy of Sciences, PO Box 1129, Hefei 230031 |
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| Cite this article: |
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LIANG Li-Min, FEI Guang-Tao, SHUI Jia-Peng et al 2005 Chin. Phys. Lett. 22 2109-2111 |
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Abstract For the necessity of measuring the small phase difference of internal friction, a detailed comparison is carried out among the fast Fourier transformation (FFT), correlation function and three-parameter sine wave curve-fit methods. The comparison shows that the three-parameter sine wave curve-fit method can obtain more precise phase angle difference than correlation methods. Compared with the FFT algorithm, the three-parameter sine wave curve-fit method can obtain more precise frequency values.
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81.40.Jj. 83.85.Ns
83.85.St
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Published: 01 August 2005
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