AN INVESTIGATION OF SAVITZKY-GOLAY FILTERS FOR THE CALCULATION OF DERIVATIVES FOR PRIMARY SHOCK CALIBRATION |
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| H. Nozato, Th. Bruns, H. Volkers, A. Oota |
- Abstract:
- This manuscript reports about an investigation of two kinds of digital filters used for numerical differentiation of the displacement signal in the case of primary shock calibration of accelerometers. One is a 4th order Butterworth low-pass (4th BW) filter of infinite impulse response filters, and another is a Savitzky-Golay (SG) filter, which applies local polynomial approximation. The computational comparison was applied to low and high shocks using known analytical excitation functions. On the optimized condition of 4th BW and S-G filters, each sum of residuals was compared. As the result, the S-G filters showed for low and high shocks a better performance as low-pass filter than the 4th BW filters. In addition, the appropriate window width for the local polynomial approximation was derived.
- Keywords:
- shock, acceleration, infinite impulse response filter, derivative, Savitzky-Golay filter
- Download:
- IMEKO-WC-2012-TC22-O9.pdf
- DOI:
- -
- Event details
- Event name:
- XX IMEKO World Congress
- Title:
Metrology for Green Growth
- Place:
- Busan, REPUBLIC of KOREA
- Time:
- 09 September 2012 - 12 September 2012