Improved method for damping coefficient measurement based on spectral analysis of a self-mixing signal
| Autor: | Hanqiao Chen, Xiulin Wang, Huiru Yang, Feng Teng, Wencai Huang, Yanbin Xiong |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Signal processing Mean squared error business.industry Mathematical analysis 01 natural sciences Signal Atomic and Molecular Physics and Optics Standard deviation 010309 optics Vibration symbols.namesake Fourier transform Optics Interference (communication) 0103 physical sciences symbols Electrical and Electronic Engineering business Engineering (miscellaneous) Bessel function |
| Zdroj: | Applied optics. 59(8) |
| ISSN: | 1539-4522 |
| Popis: | In this paper, the self-mixing interference subject to weak optical feedback has been used to measure the damping vibration. By analyzing the spectrum of the signal, the damping coefficient can be extracted precisely from the nth-order Bessel functions, which are determined by the dominant harmonic order of the frequency spectrum. Theoretical derivation and signal processing are presented. Four kinds of vibrating targets with different damping coefficients are measured. Experimental results show that standard deviation and root mean square error of data are less than 0.2 and 0.1, respectively, which means fitted values are stable as well as having a very high fitting precision. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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