Implication of dynamic unbalance to the inertial accelerometer calibration with vibrafuge
In practical navigation and guidance applications,inertial accelerometers are always subjected to multiple accelerations at the same time.But inertial accelerometers are usually calibrated in the laboratory with either pure vibration or constant acceleration according to IEEE standards and ISO standards.In this case,there are inconsistent characteristics of sensors working in the laboratory and operational conditions because the input accelerations are different.In order to decrease the inconsistency,calibration of sensors with vibrafuge,a machine which can produce multicomponent inputs,is proposed.But there is a critical problem for the vibrafuge is the dynamic unbalance due to uneven distribution of mass.In order to build a high-performance vibrafuge for metrological purpose,we analyze the implication of dynamic unbalance of the vibrafuge to the output acceleration in this paper.The structure of the vibrafuge is introduced to explain how the dynamic unbalance affects the vibrafuge.Kinetics analysis is presented to show the implication of the dynamic unbalance.By simulation and examples,we estimate the influence of the dynamic unbalance.
accelerometer calibration centrifuge dynamic unbalance vibrafuge
Xue-Ming Dong Wei Guan Xiao-Feng Meng
Changcheng Institute of Metrology and Measurement(CIMM),Huanshan villiage,Wenquan Town,Beijing 10009 Science and Technology on Inertial Laboratory of Beihang University(BUAA),No.37,Xueyuan Road,Beijing
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-5
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）