REAL-TIME DYNAMIC ERROR COMPENSATION OF ACCELEROMETERS BY DIGITAL FILTERING

Clemens Elster, Sascha Eichstädt, Alfred Link, Thomas Bruns

Abstract

The output signal of an accelerometer typically contains dynamic errors when a broadband acceleration is applied. In order to retrieve the applied acceleration, post-processing of the accelerometer's output signal is required. To this end, we propose the application of a digital filter. We describe the construction of an appropriate filter and consider the uncertainty associated with the filtered output signal. Explicit formulae can be employed to calculate both, the filtered output signal and its associated uncertainty, in real-time. We illustrate the need and benefit of the proposed approach in terms of an example.

Keywords

accelerometer, uncertainty, digital filter

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IMEKO-WC-2009-TC22-058.pdf

DOI

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IMEKO TC

TC22 - Vibration Measurement

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