压电陶瓷激振器定频激振能力的评价方法
发布时间:2018-06-17 16:01
本文选题:压电陶瓷激振器 + 定频激振 ; 参考:《东北大学学报(自然科学版)》2016年10期
【摘要】:提出了评价压电陶瓷激振信号的线性度指标,并基于自主研发的压电陶瓷激励反馈系统,对一款PZT陶瓷进行了实验研究.在分析其激振力的影响因素及影响规律的基础上,提出了压电陶瓷定频激振能力的评价方法.由实验数据建立了评价方程,得到了其定频激振的频率置信区间,使其可以更好地被应用到板壳类薄壁构件的高阶振动测试研究中.研究结果表明,压电陶瓷定频激振能力的总体特点是在低频状态下可实现高幅定频激励,而高频状态下仅能实现低幅定频激励.
[Abstract]:The linearity index for evaluating the excitation signal of piezoelectric ceramics is proposed. Based on the self-developed piezoelectric ceramic excitation feedback system, an experimental study on a PZT ceramic is carried out. Based on the analysis of the influence factors and laws of the exciting force, a method for evaluating the constant frequency excitation ability of piezoelectric ceramics is proposed. The evaluation equation is established from the experimental data, and the frequency confidence interval of the constant frequency excited vibration is obtained, which can be better applied to the high-order vibration test of thin-walled members of plates and shells. The results show that the general characteristic of the constant frequency excitation ability of piezoelectric ceramics is that the high amplitude constant frequency excitation can be realized in the low frequency state, but the low amplitude constant frequency excitation can be only realized in the high frequency state.
【作者单位】: 东北大学机械工程与自动化学院;
【基金】:国家自然科学基金资助项目(51505070) 中央高校基本科研业务费专项资金资助项目(N150304011) 国家重大科学仪器设备开发专项(2013YQ470765)
【分类号】:TH82
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本文编号:2031611
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