UNCERTAINTY EVALUATION OF DYNAMIC MEASUREMENTS IN LINE WITH THE GUM

• Abstract:

  We consider the task of uncertainty evaluation in the context of dynamic measurements. We assume that the relation between the time-dependent value of the measurand and the available output signal of an employed sensor is governed by a linear time-invariant system. Estimation of the measurand is done by applying a digital filter to the sensor's output signal. We propose a method for uncertainty evaluation which is in line with the Guide to the Expression of Uncertainty in Measurement (GUM). The method accounts for dynamic errors due to non-perfect compensation of the dynamic behavior of the sensor, and it allows for real-time calculation when a causal digital filter is employed. The proposed uncertainty calculation method can be used to design an uncertainty-optimum filter. We illustrate the procedures in terms of a simple example.
• Keywords:

  uncertainty, LTI System, digital filter
• Download:

  IMEKO-WC-2009-TC21-057.pdf
• DOI:

  _unreg_wc-2009.057

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