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| Temperature Calibration and Uncertainty Assessment Based on Climatic Environmental Test Facility |
| Received:November 14, 2019 Revised:December 21, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.05.012 |
| KeyWord:climatic environmental test facility temperature calibration temperature uniformity uncertainty |
| Author | Institution |
| DU Wen-hui |
Aircraft Strength Research Institute of China, Xi¢An , China |
| LI Dong-mei |
Aircraft Strength Research Institute of China, Xi¢An , China |
| WU Jing-tao |
Aircraft Strength Research Institute of China, Xi¢An , China |
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| Abstract: |
| The paper aims to solve the calibration problem of the super space temperature performance of Climatic Environmental Test Facility (CETF). By analyzing the structure of CETF and the organization of the airflow, the location of the temperature unevenness and the probability of volatility in the effective space of the laboratory were determined, and the temperature calibration point layout plan for the laboratory was designed. Data on temperature in CETF was acquired through the data acquisition system. The uncertain sources of temperature calibration were analyzed. The temperature performance and the expansive uncertainty were evaluated. Taking the data analysis of low temperature working condition -50 ℃ and high temperature working condition 50 ℃ as an example, the reliability of average indoor temperature in the range of -48.67~-50.27 ℃ in the climate environment laboratory was 95% at low temperature -50 ℃; and it was 95% at 50 ℃ when the average indoor temperature was in the range of 48.57~50.77 ℃. The calibration method of temperature performance of CETF can be used to calibrate the temperature performance of super space laboratory. It also verifies that the technical indexes such as temperature uniformity and fluctuation of CETF meet the design requirements. |
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