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| Temperature Characteristics of Uncertainty of Static Radius Measurement of Precision Centrifuge |
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| DOI：10.7643/issn.1672-9242.2022.07.015 |
| KeyWord:precision centrifuge static radius back calculation methods measurement uncertainty temperature |
| Author | Institution |
| LIU Shi-hui |
Institute of System Engineering, CAEP, Sichuan Mianyang , China |
| CHEN Wen-ying |
Institute of System Engineering, CAEP, Sichuan Mianyang , China |
| FU Xing |
Institute of System Engineering, CAEP, Sichuan Mianyang , China |
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| Abstract: |
| This paper is intended to research the influence of temperature on the uncertainty of static radius measurement of precision centrifuge. Based on back calculation methods of static radius measurement, a mathematical model was deduced, a precision constant temperature device was designed, to obtain the output data of the accelerometer at different temperatures in a 1g centrifugal field. Based on the temperature characteristic model, the key factors affecting the uncertainty of static radius measurement were determined. The test data analysis results showed that, within the recommended operating range of the accelerometer (50~60 ℃), the uncertainty of static radius measurement showed a distribution law of “increasing first and then decreasing” with increasing temperature, and entered the order of 10‒7 magnitude at 50℃. The temperature sensitivity of the accelerometer is the most important factor affecting the uncertainty of static radius measurement. Precision temperature control is an important means to improve the static radius measurement accuracy. |
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