Metrological characterization of a 1 N m torque standard machine at PTB, Germany

Röske, Dirk

doi:10.1088/0026-1394/51/1/87

Cited by 23 publications

(12 citation statements)

References 4 publications

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“…The source of uncertainty, the probability distribution, distribution factor and relative standard uncertainty as well as the relative combined standard uncertainty and the relative combined expanded uncertainty are listed in Table 3. The uncertainties are calculated according to equations (2) to (4).…”

Section: Evaluation Of Uncertaintymentioning

confidence: 99%

The establishment of 1N·m torque standard machine at NIM

Zhang¹,

Zhang²,

Feng³

et al. 2017

ACTA IMEKO

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1 N·m torque standard machine was established at National Institute of Metrology (NIM) in 2013. The torque standard machine adopts deadweight and moment-arm type. The static air bearing with low friction is used to support the moment-arm, the invar alloy with the low expansion coefficient as the material of the moment-arm, the specially designed weight suspension part and weight loading system may ensure the applied force by small weights accurately and reliably. The mechanical structure of the machine is introduced, the results of performance test and uncertainty assessment are described. The expanded uncertainty (k = 2) is smaller than 5 × 10-5 in the range of 100 mN·m - 1 N·m, smaller than 1× 10-4 in the range of 10 mN·m - 100 mN·m.

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Section: Evaluation Of Uncertaintymentioning

confidence: 99%

The establishment of 1N·m torque standard machine at NIM

Zhang¹,

Zhang²,

Feng³

et al. 2017

ACTA IMEKO

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show abstract

“…20 to 30 µm) to get a very precise contact point for the deadweight force. Several aspects of machine design and related measurements can be found in [6]- [12].…”

Section: About the Traceable Calibration Of Torquementioning

confidence: 99%

MN·m torque calibration for nacelle test benches using transfer standards

2016

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To verify all technical aspects of wind turbines, more and more nacelle test benches have come into operation. One crucial parameter is the initiated torque in the nacelles, which amounts to several MN·m. So far, no traceable calibration to national standards has been performed in such test benches. The paper will show calibration possibilities which already exist and also show future prospects.

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“…As has been demonstrated in the relevant literature [4][5][6][7][8][9][10][11][12][13][14], the basic characteristics of MM include sensitivity, additive errors, multiplicative errors, measurement ranges, and primary and secondary errors (uncertainties) in the MM which in international scientific metrology practice is sometimes known as the Measurand Model. These characteristics are sufficient to establish standards for the accuracy of the MM [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…These characteristics are sufficient to establish standards for the accuracy of the MM [11,12]. This requires that the mathematical tools used in the research study of a MM in static mode (i.e.…”

Section: Introductionmentioning

confidence: 99%

Metrological characteristics of the torque measurement of electric motors

Vasilevskyi¹

2017

Int. J. Metrol. Qual. Eng.

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Abstract. This paper proposes a method of determination of the basic metrological characteristics of measurement means (MM) in order to measure the torque of electric motors (EM), such as sensitivity, nominal conversion functions, and additive and multiplicative errors. The nature of change of metrological characteristics was researched using the Measurand Model derived, in the conversion measuring range studied in this paper. Summarised values for additive and multiplicative errors were established for the MM of torque, under the conditions of deviation in terms of the impact value from its nominal value. In addition, the methodology was analysed to enable recalculation of additive and multiplicative errors related to the standard uncertainty of type B. This was undertaken to establish the quality of measurement according to international standards. The research was founded on Measurand Model obtained for multiplicative and additive components in the errors inherent in torque MM.

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Metrological characterization of a 1 N m torque standard machine at PTB, Germany

Cited by 23 publications

References 4 publications

The establishment of 1N·m torque standard machine at NIM

The establishment of 1N·m torque standard machine at NIM

MN·m torque calibration for nacelle test benches using transfer standards

Metrological characteristics of the torque measurement of electric motors

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