天平校准不确定度的一种评估方法 |
| |
引用本文: | 刘春风,熊琳,刘家骅,李海燕. 天平校准不确定度的一种评估方法[J]. 实验流体力学, 2016, 30(2): 84-90. DOI: 10.11729/syltlx20150109 |
| |
作者姓名: | 刘春风 熊琳 刘家骅 李海燕 |
| |
作者单位: | 中国航天空气动力技术研究院,北京,100074 |
| |
摘 要: | 建立了一套完整的天平校准不确定度评估流程:单独评估校准系统的不确定度、基于检验载荷的残差,通过偏差极限和精度极限评估其它各误差源引入的不确定度、合并得到校准不确定度结果。以BCS-100天平校准系统为例,选择天平TG624C重复校准7次,实现了该评估方法。评估结果表明:(1)天平安装的滚转角和加载时天平的角位移,二者引入的不确定度为主要分量,应作为技术改造的重点;(2)Q、Z和My 3个小量单元,受Y和Mz 2个大量的干扰,其不确定度值稍大;(3)精度极限相比于偏差极限要小很多。建立的整套评估方法对于其他校准系统也是通用的。
|
关 键 词: | 不确定度 校准系统 偏差极限 精度极限 重复 |
A method to estimate the balance calibration uncertainty |
| |
Abstract: | A complete uncertainty estimation process for balance calibration is established:as-sessing the calibration system uncertainty,assessing the bias limit and precision limit based on checking load residuals to estimate the uncertainty from other errors,and combining them to ob-tain the total uncertainty result.For the BCS-100 calibration system,balance TG624C is calibra-ted seven times repeatedly to implement the method.The result shows that:(1 )The uncertainty caused by the roll angle of balance installation and the angular displacement of balance in the cali-bration are the main components,which shows the direction to upgrade the calibration system;(2)Due to the interference ofY and Mz,the uncertainties of Q、Z and My are larger;(3)The pre-cision limit is much smaller compared to the bias limit.The method is also applicable to other calibration systems. |
| |
Keywords: | |
|
| 点击此处可从《实验流体力学》浏览原始摘要信息 |
|
点击此处可从《实验流体力学》下载全文 |
|