STATE-SPACE BASED ADAPTATION OF THE ISO GUM TO TIME-DEPENDENT UNCERTAINTIES OF DYNAMICALLY MEASURED QUANTITIES

Marco Wegener, Eckehard Schnieder

Abstract

The well-established ISO GUM method for evaluating measurement uncertainties refers to measurements where the properties of all involved quantities are assumed to be constant. In many technical applications, however, a time-dependent uncertainty information that can be attributed to values measured and filtered by dynamic systems is more and more needed, e.g. for closed-loop control. This contribution extends the existing ISO GUM method consistently to time-dependent quantities of dynamic systems in a straightforward way. For this purpose, state-space models are used, as this approach results in a method that is very close to the original ISO GUM. The method is demonstrated by using the example of a low-pass filter.

Keywords

ISO GUM, dynamic, uncertainty, state-space

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IMEKO-WC-2012-TC7-O4.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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