高g值加速度计动态线性度标定方法研究

doi:10.3969/j.issn.1000-1093.2017.12.017

兵工学报 ›› 2017, Vol. 38 ›› Issue (12): 2429-2437.doi: 10.3969/j.issn.1000-1093.2017.12.017

高g值加速度计动态线性度标定方法研究

袁康博，郭伟国

（西北工业大学航空学院, 陕西西安 710072）

收稿日期:2017-01-10 修回日期:2017-01-10 上线日期:2018-02-01
作者简介:袁康博(1992—），女，博士研究生。E-mail:kangboyuan@mail.nwpu.edu.cn
基金资助:
国家自然科学基金项目(11572261)

Research on the Dynamic Linearity Calibration Method of High-g Accelerometers

YUAN Kang-bo, GUO Wei-guo

(School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China)

Received:2017-01-10 Revised:2017-01-10 Online:2018-02-01

摘要/Abstract

摘要： 针对高g值加速度计动态线性度标定问题，对基于霍普金森杆的标定系统所存在的技术问题进行了研究。为实现双子弹同步撞击标定杆从而产生标定所需的叠加信号，提出了单一炮管同步发射双子弹的方法，利用防止内外2发子弹相互滑动的紧固措施，有效地实现了双子弹撞击的同步性。运用有限元方法系统研究了子弹几何形状、材料、冲击速度和整形器的使用对高g值加速度计标定中的激励脉冲波形的影响机制，进而总结出双子弹标定系统子弹选择和波形控制方法。结果表明：在双子弹标定系统中，为了对加速度计进行某一频带上的动态线性度标定，可通过改变双子弹相对截面积或冲击速度的方式改变g值，通过改变子弹材料的方式改变标定频带。最后，利用提出的单炮管双子弹霍普金森杆标定系统对988-1198型加速度计的动态线性度进行实测，效果良好，证明了该方法的可行性。

关键词: 固体力学, 高g值加速度计, 动态线性度, 霍普金森杆, 波形整形

Abstract: The key problems in the dynamic linearity calibration of high-g accelerometers using Hopkinson bar system are studied. A single gun barrel system is proposed to achieve the synchronous impacts of two projectiles in the dynamic linearity calibration of accelerometers, in which the two projectiles are fastened by small-sized screws near their rear ends. The influences of geometry and material of projectile, impact velocity and pulse shaper on the excitation signals are investigated by using numerical method. It is found that that the amplitude of excitation pulse could be changed by adjusting the relative area of two projectiles and impact velocity. A certain frequency bandwidth could be achieved by using the projectile made from proper material. The single-barrel system is employed to calibrate the dynamic linearity of 988-1198 accelerometers, which proves the practicability of the proposed calibration system. Key

Key words: solidmechanics, high-gaccelerometer, dynamiclinearity, Hopkinsonbar, pulseshaping

中图分类号:

O347.4⁺1

袁康博，郭伟国. 高g值加速度计动态线性度标定方法研究[J]. 兵工学报, 2017, 38(12): 2429-2437.

YUAN Kang-bo, GUO Wei-guo. Research on the Dynamic Linearity Calibration Method of High-g Accelerometers[J]. Acta Armamentarii, 2017, 38(12): 2429-2437.

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第38卷第12期
2017 年12月兵工学报ACTA
ARMAMENTARIIVol.38No.12Dec.2017

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高g值加速度计动态线性度标定方法研究

Research on the Dynamic Linearity Calibration Method of High-g Accelerometers

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