球轴承接触角测量仪的动态不确定度  

Dynamic uncertainty of the measuring instrument for ball bearings'contact angles

作　　者：秦荦晟 沈雪瑾[1] 郭梦媛 曹崇崇 

机构地区：[1]上海大学机电工程与自动化学院机械自动化工程系,上海200072 [2]上海集优机械股份有限公司上海天安轴承有限公司,上海200233

出　　处：《航空动力学报》2017年第8期2025-2031,共7页Journal of Aerospace Power

基　　金：国家"十二五"科研项目(D.50-0109-15-001;D.11-0109-13-080)

摘　　要：考虑球轴承接触角测量仪的自身动态特性、轴承外圈的试验转速、试验加载力对测量仪测量精度的影响,建立了测量仪的动态不确定度计算模型。针对小样本试验测试结果,采用灰色理论的方法评价了球轴承接触角测量结果的不确定度。基于不确定度的分离原理,分离出测量仪的自身动态特性、外圈转速、试验加载力对测量不确定度的影响规律,建立了接触角测量的动态不确定度计算模型,并通过实际算例验证了模型。建立的测量仪动态不确定度计算模型可用于预测不同工况下的接触角测量不确定度,有助于及时对测量仪进行相应的校准,以提高接触角测量结果的精度。The influences on the precision of the measuring instrument for ball bearings＇ contact angle caused by the dynamic characteristic of the instrument,test speed and test load were taken into consideration,then the calculation model of the instrument＇s dynamic uncertainty was established.Based on the measuring results of the small sample,the grey theory was applied to calculate the uncertainty of the measurement.The principle of the influence on the uncertainty of the measurement caused by the instrument＆#39;s dynamic characteristic,test speed and test load was separated based on the uncertainty separation principle,and then the calculation model of the instrument＇s dynamic uncertainty was established.After that,the calculation model was verified by the actual examples.The calculation model of the instrument＇s dynamic uncertainty established could be used to predict the uncertainty of the measurement for contact angle under different conditions.With this help,the corresponding calibration could be done on the measuring instrument in time to raise the precision of the measurement for ball beating＇s contact angle.

关 键 词：球轴承 接触角测量 动态不确定度 灰色理论 不确定度分离 

分 类 号：V241.7[航空宇航科学与技术—飞行器设计] TB922[一般工业技术—计量学]