簧片式电磁振动台波形失真特性分析

摘要
图/表
参考文献(15)
相关文章 (15)

全文: PDF (1740 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要低频电磁振动台输出的大行程激励信号会受回复弹簧刚度非线性的影响，产生严重的谐波失真。为此，在电磁振动台机电耦合简化模型基础上，通过将簧片式回复结构非线性刚度简化为有限阶幂级数，分析得到刚度非线性导致振动波形失真机理；然后，通过Simulink仿真平台分析选定簧片结构可知，振动行程（簧片形变量）的增加及频率的降低均使刚度非线性特性及对应的波形失真增大。最后，实验测试得到电磁振动台的非线性刚度特性及不同频率、幅值输出信号失真度值，通过与仿真数据对比，验证了理论计算及仿真分析的正确性。研究成果可为设计低波形失真电磁振动台及提高振动传感器校准精度提供理论及实验依据。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	胡天恩1
	张旭飞1
	2
	兰媛1
	2

关键词 ：电磁振动台, 簧片, 非线性刚度, 波形失真, 低频

Abstract：The large-stroke excitation signal output by the low-frequency electromagnetic vibrator is affected by the nonlinear leaf spring stiffness and accompanied by serious waveform distortion. Therefore, on the basis of the simplified electromechanical coupling model of the electromagnetic vibrator, the power series approximate solution is solved for the nonlinear leaf spring stiffness, and the distortion mechanism of the vibration waveform caused by the nonlinear stiffness is analyzed. Then, the selected springs are analyzed through the Simulink platform and the results show that the vibration stroke increase and frequency decrease all correspond to the increases of stiffness nonlinearity and waveform distortion. Finally, the experiments obtain the nonlinear stiffness of the electromagnetic vibrator and distortions of the output signal at different frequencies and amplitudes. The comparison with the simulation verifies the correctness of the theoretical calculation and simulation analysis. The research results can provide theoretical and experimental basis for designing electromagnetic vibrator with low waveform distortion and improving the calibration accuracy of vibration sensors.

Key words： electromagnetic vibrator leaf spring nonlinear stiffness waveform distortion low frequency

收稿日期: 2021-01-25 出版日期: 2021-11-15

引用本文:

胡天恩1，张旭飞1,2，兰媛1,2. 簧片式电磁振动台波形失真特性分析[J]. 振动与冲击, 2021, 40(21): 179-184.
HU Tian’en1, ZHANG Xufei1,2, LAN Yuan1,2. Analysis of waveform distortion characteristics of reed type electromagnetic vibrator. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(21): 179-184.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I21/179

[1] 于梅, 何闻, 刘爱东, 等. 超低频振动国家计量基准装置的研究与建立[J]. 计量学报, 2011, 32(2): 97-100.
YU Mei, HE Wen, LIU Aidong, et al. Study and establishment of the national standard of the ultra-low frequency vibration [J]. Acta Metrologica Sinica, 2011, 32(2): 97-100.
[2] ISO 16063-11. Methods for the calibration of vibration and shock transducers, Part 11: Primary vibration calibration by laser interferometry [S]. Geneva: ISO, 1999.
[3] GUSTAVO P. Ripper, RONALDO S. Dias, GUILHERME A. Garcia. Primary accelerometer calibration problems due to vibration exciters [J]. Measurement, 2009, 42(9): 1363-1369.
[4] PAYNE B, EVANS D J. Errors in accelerometer calibration using laser interferometry due to harmonic distortion and cross motion in the applied motion [J]. Proc Spie, 2000, 4072: 102-105.
[5] 魏燕定. 超低频标准振动台波形失真度近似解析解[J]. 振动与冲击, 2000, 19(3): 49-51.
WEI Yanding. Approximate analytical solution of waveform distortion of ultra-low frequency standard vibrator [J]. Journal of Vibration and Shock, 2000, 19(3): 49-51.
[6] 陈晓建, 周世华. 具有强非线性振动台动力学特性研究[J]. 机械设计与制造, 2018, (z1): 157-159.
CHEN Xiaojian, ZHOU Shihua. Dynamic analysis of a parametrically excited vibration platform with strong nonlinearity [J]. Machinery Design & Manufacture, 2018, (z1): 157-159.
[7] LI Ruijun, LEI Yingjun, ZHANG Liansheng, et al. High-precision and low-cost vibration generator for low-frequency calibration system [J]. Measurement Science and Technology, 2018, 29(3): 034008-1-034008-7.
[8] 何闻, 张旭飞, 贾叔仕, 等. 用于标准振动台的簧片悬架结构[P]. 中国, CN201510048136.4, 2015-01-30.
[9] 苏州苏试试验集团股份有限公司. 一种电动振动台低失真动圈骨架结构[P]. 中国, CN202020425461.4, 2020-09-24.
[10] 刘盈. 汽车空气弹簧悬架系统的非线性动力学特性研究[D]. 陕西: 西安科技大学, 2014.
[11] NICKLICH H, MENDE M. Calibration of Very Low Frequency Accelerometers: A challenging task [J]. Sound & Vibration, 2011, 45(5): 1521-1527.
[12] 王春宇. 超低频标准振动台相关设计理论及运动控制技术的研究[D]. 杭州: 浙江大学, 2013.
[13] 陈群. 长行程超低频水平向电磁振动台中关键技术问题的研究[D]. 杭州: 浙江大学, 2015.
[14] HE Wen, ZHANG Xufei, WANG Chunyu, et al. A long-stroke horizontal electromagnetic vibrator for ultralow-frequency vibration calibration [J]. Measurement Science and Technology, 2014, 25(8): 085901.
[15] 薛米安, 陈奕超, 苑晓丽, 等. 低载液率液体晃荡冲击压力的试验研究[J]. 振动与冲击, 2019, 38(14): 239-245,275.
XUE Mi'an, CHEN Yichao, YUAN Xiaoli, et al. Experimental study on the impact pressure of sloshing liquid with low filling level [J]. Journal of Vibration and Shock, 2019, 38(14): 239-245, 275.