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Infuence of the dynamic goniometer’s bearing on the measurement error
https://doi.org/10.32446/0368-1025it.2022-8-52-57
Abstract
In order to improve the accuracy of the dynamic goniometer, the influence of its bearing on the measurement error was studied. The spectral characteristics of the random error of two dynamic goniometers with the same optical angle encoders and different bearings, aerostatic and angular contact ball bearings, are studied. It is shown that the use of a ball bearing in the goniometer leads to non-stationarity of the random error of angular measurements. Using wavelet analysis and Allan variation, the random error of the dynamic goniometer is analyzed, the sources of nonstationarity are identified, and its potential accuracy is determined. It has been established that the use of an aerostatic bearing makes it possible to increase the accuracy of a dynamic goniometer and bring its value closer to the accuracy of a static goniometer, in which the influence of the bearing assembly is minimized. The results obtained are of interest to users and developers of dynamic goniometers.
Supporting agencies: the research was supported by RSF (project no. 20-19-00412).
About the Authors
P. A. Pavlov
St. Petersburg Electrotechnical University ETU “LETI”
Russian Federation
Russian Federation
Petr A. Pavlov
St. Petersburg
E. M. Ivashchenko
St. Petersburg Electrotechnical University ETU “LETI”
Russian Federation
Russian Federation
Elena M. Ivashchenko
St. Petersburg
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Review
For citations:
Pavlov P.A., Ivashchenko E.M. Infuence of the dynamic goniometer’s bearing on the measurement error. Izmeritel`naya Tekhnika. 2022;(8):52-57. (In Russ.) https://doi.org/10.32446/0368-1025it.2022-8-52-57
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