Hopkinson杆校准系统中高g值激励加速度脉冲的产生与调整  

Generation and Adjustment of Excitation Pulse for Calibration of High g Accelerometer in Hopkinson System

作　　者：范锦彪[1,2] 徐鹏[1,3] 祖静[1,2] 

机构地区：[1]中北大学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：《机械工程学报》2015年第6期93-97,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(51275488)

摘　　要：针对高g值加速度传感器脉冲校准中遇到的激励脉冲宽度问题,通过有限元分析法,模拟Hopkinson杆校准系统中激励加速度脉冲的产生过程,确定适用于加速度传感器冲击灵敏度校准和频率响应特性校准的激励脉冲宽度及其相应的碰撞组合;并通过试验手段,验证了仿真结论的正确性。试验结果表明,通过改变子弹头的形状和调整垫的材料和厚度,可以在同一Hopkinson杆校准系统中产生不同持续时间的激励脉冲,以适应不同的校准需求,最大限度地发挥Hopkinson杆校准系统的潜能。In order to determine the duration of shock pulse exciting a highg accelerometer, a finite element method is used to simulate propagation of stress pulse and generation of acceleration pulse in a Hopkinson bar. The excitation pulse width is conformed for the calibration of shock sensitivity and frequency response characteristic of a high-g accelerometer. These excitation pulses are generated by using the corresponding collision component including projectile and adjusting pad. It is demonstrated that the excitation pulses with different duration can be generated in the same Hopkinson bar by changing the bullet shape of projectile and the material and thickness of adjusting pad to excite a high-g accelerometer for different calibration parameters.

关 键 词：校准系统 HOPKINSON杆 激励脉冲 有限元模拟 

分 类 号：TH113[机械工程—机械设计及理论] TP271[自动化与计算机技术—检测技术与自动化装置]