高g值加速度计宽脉冲冲击校准准则  

Shock calibration principle of a high-g accelerometer with a wide pulse excitation

作　　者：范锦彪[1,2] 李婉蓉[1,2] 祖静[1,2] 徐鹏[1,3] 林祖森[1,3] 

机构地区：[1]仪器科学与动态测试教育部重点实验室电子测试技术重点实验室,太原030051 [2]中北大学计算机与控制工程学院,太原030051 [3]中北大学理学院,太原030051

出　　处：《振动与冲击》2014年第3期140-144,共5页Journal of Vibration and Shock

基　　金：山西省青年科技研究基金(2008021015)持续资助项目

摘　　要：针对高g值加速度计冲击灵敏度绝对法校准中遇到的激励脉冲的宽度问题,以加速度计数学模型为基础,导出了适用于高g值加速度计冲击灵敏度校准的宽脉冲校准准则。该准则给出了对不同谐振频率的高g值加速度计的冲击灵敏度进行校准时,校准所需的激励宽脉冲的最小宽度与加速度计第一阶安装谐振频率、阻尼比及校准误差的关系。以Hopkinson杆校准系统为试验手段,通过988型高g值压电加速度计和SIMIT-AYZ-3型高g值压阻加速度计的校准试验数据验证了准则的正确性。该准则为高g值加速度计冲击灵敏度校准时激励脉冲宽度的确定提供了理论依据。In order to determine the duration of a shock pulse used as an excitation in absolute calibration of a high-g accelerometer,a calibration principle was put forward based on mathematical model of an accelerometer.For the accelerometers with different natural frequency,the principle presented the relationship of the first order natural frequency and damping ratio of an accelerometer,calibration error and the least excitation pulse duration were obtained.With a Hopkinson calibration system,the correctness of the principle was validated with calibration tests for a 988 high-g accelerometer and a SIMIT-AYZ-3 one.This principle provided a theoretical basis for determining a shock pulse duration used in absolute calibration of a high-g accelerometer.

关 键 词：测试计量技术及仪器 灵敏度校准 宽脉冲激励 高g值加速度计 

分 类 号：TB934[一般工业技术—计量学] TP21[机械工程—测试计量技术及仪器]