Scientific and Technical Journal

ELECTROTECHNIC AND COMPUTER SYSTEMS

ISSN Print 2221-3937
ISSN Online 2221-3805
EVALUATION OF THE TYPE A UNCERTAINTY IN MEASUREMENTS WITH AUTOCORRELATED OBSERVATIONS
Abstract:

Expanding of the application range of the GUM uncertainty type A evaluation method to the case of regularly sampled autocorrelated observations is described. As the first step is the previous identification and cleaning of the raw sample data from the regularly variable components. Then formulas for standard deviation of the mean value are expressed with the use of the so-called "effective number" of observations. This quantity depends on number of observations and on the sample autocorrelation function and allows calculating the expanded uncertainty due GUM recommendations. Given is method of estimation of autocorrelation function for the sample data. Considerations are illustrated by examples.               

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References

1. Dorozhovetz M. Proposals for the extension methods of determining the uncertainty of measurements by GUM guide / M. Dorozhovetz, Z. L.Warsza. PAR No. 1.– 2007. – Р.16–25 [In Polish].

2. Warsza Z. L. Uncertainty type а evaluation of autocorrelated measurement observations. Biuletyn WAT (Military Technical Academy) / Z. L. Warsza, M. Dorozhovets. – Warszawa :– Vol. LVII. – No 2. – 2008. – Р. 143–152 [In Polish].

3. Warsza Z. L. Eliminacja wpływu nieznanych a priori składowych systematycznych na niepewność typu A pomiarów o równomiernym próbkowaniu. (Elimination of influence of unknown a priori systematic components on the uncertainty type A in measurement of regular sampling). PAR Pomiary Automatyka Robotyka (Measurements Automation Robotics) / Z. L. Warsza, J. Korczynski.– 2008. – No2. – Р. 5–13

[in Polish].

4. Warsza Z. L. Niepewność typu а pomiaru o obserwacjach samoskorelowanych(Measu-rement uncertainty type A ofautocorrel-ated observations) /Z. L. Warsza, A. Zieba.PAK Pomiary Automatyka Kontrola. – No. 2. – 2012. –Р. 157–162 [in Polish].

5. Zięba A. Effective number of observati-ons and unbiased estimators of variance for auto correlated data – an overview /A. Zieba.Metrology& Measurement Systems, 17. – 2010. Р. 3–16 [in Polish].

6. Zieba A. Niepewność pomiaru dla ciągu obserwacji samo skorelowanych (Uncertainty of measurement of the auto correlated observation) / A. Zieba. Monograph: Niepewność pomiarów w teorii i praktyce. Pracazbiorowa. (The uncertainty of measurement in theory and practice.Collective work). GUM. – Warsaw: – 2011. – Р. 109–118 [in Polish].

7. Zięba A. Standard deviation of the mean of auto correlated observations estimated with the use of the autocorrelation function estimated from the data / A. Zięba, P. Ramza. Metrology& MeasurementSystems, 18. – 2011. Р. 529–534 [in Polish].

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