文档介绍：兵工自动化自动测量与控制 O. I. Automation
2007 年第 26 卷第 8 期 Automatic Measurement and Control 2007, Vol. 26, No. 8
文章编号:1006-1576(2007)08-0063-03
消除传感器附加质量影响的机枪动力特性测试技术
董自卫 1,2,唐力伟 1,高星亮 1,栾军英 1
(1. 军械工程学院兵器测试中心,河北石家庄 050003;2. 武汉军械士官学校枪炮系,湖北武汉 430075)
摘要:消除传感器附加质量对机枪模态参数识别结果影响的方法,基于 LMS 系统建立其模态试验系统。全枪模
态试验通过单点瞬态激励、多点测量方法,测出机枪上各测点的频响函数,识别出机枪的各阶模态参数。为提高频
响函数的信噪比和锤击激振的测试精度,可对激励信号加力窗处理。利用负延时触发采样以捕捉到完整的冲击力波
形,对响应信号加指数窗处理可解决响应信号衰减过快引起的泄漏问题。
关键词:机枪;动力特性测试;传感器附加质量;LMS 系统;模态分析
中图分类号:TJ24; O32 文献标识码:A
Scatter-Gun Dynamic Characteristics Test Technique for Eliminating Effects
of Transducer Additional Quality
DONG Zi-wei1, 2, TANG Li-wei1, GAO Xing-liang1, LUAN Jun-ying1
(1. Weapon Test Center, Ordnance Engineering College, Shijiazhuang 050003, China;
2. Dept. of Gun, Wuhan Ordnance Petty Officer Institute of PLA, Wuhan 430075, China)
Abstract: The method for eliminating effects of transducer additional quality on scatter-gun modal parameter
recognizing establishes the modal testing system based on LMS system. The modal testing measures the frequency call
function of test points on scatter-gun and recognizes the step modal parameters by single point momentary stimulation and
multi-points measuring. Carry out power window processing on stimulation signal for improving SNR of frequency call
function and testing precision of hammering. Adopts trig