2) super low-frequency vibration measurement
超低频振动测量
1.
As viewed from multiple application fields of low-frequency and super low-frequency vibration measurement, the importance of researching and establishing metrology standards for measuring the low-frequency and the super low-frequency vibration magnitude and phase characteristics.
从低频和超低频振动测量多个应用领域的角度讨论研究建立低频超低频振动幅相特性计量基标准溯源体系的重要性,介绍国内外研究发展状况,提出低频电压测量的溯源性问题,分析了超低频振动计量基标准实现精确测量的若干关键技术。
3) ultralow frequency absolute vibration
超低频绝对振动
1.
The detection of ultralow frequency absolute vibration signal parameter has very wide ranges of prospects for application in engineering.
超低频绝对振动信号参数的检测在工程上有着十分广泛的应用前景。
4) Low-frequency vibration
低频振动
1.
Numerical analysis of building under low-frequency vibrations induced by subway running train;
地铁运行列车引起建筑物低频振动的数值分析
2.
A new phase difference measurement method for low-frequency vibration signals based on DTFT;
基于DTFT的一种低频振动信号相位差测量新方法
3.
This paper investigated the influence of low-frequency vibration on the dispersion of nano-OMMT in the compound of HDPE/nano-OMMT by the self-made vibration injection device.
利用自行研制的振动注塑装置研究低频振动对HDPE/纳米OMM T体系中纳米OMM T在基体中的分散性。
5) Low Frequency Vibration
低频振动
1.
Study on Effect of Low Frequency Vibration Injection on Dispersion of PP/Nano-meter CaCO_3;
低频振动注塑改善PP/纳米CaCO_3分散性的研究
2.
Influence of low frequency vibration on osteogenesis of bone marrow stromal cells and its mechanism;
低频振动对骨髓基质细胞成骨能力影响及机制的研究
3.
Research on exceptional signal analysis of low frequency vibration of hydro-generating unit;
水轮发电机组低频振动异常信号分析研究
6) Ultra-low frequency standard vibrator
超低频标准振动台
1.
In the paper,based on the analysis of conventional low frequency standard vibrator,kinetic equation of ultra-low frequency standard vibrator is studied,and the approximate expression and formula for waveform distortion are given Analyzing this formula,the factors affecting waveform distortion such as damping,vibration amplitude,frequency,nonlinear coefficient of suspension spring are .
本文在国内已有的低频标准振动台研究基础上 ,首次建立了超低频标准振动台的动力学方程 ,并求出了其近似解析解和波形失真度计算公式。
2.
In this paper, a new compound controller with PID controller and ILC controller was designed ,and applied to sine waveform control in ultra-low frequency standard vibrator.
将迭代自学习控制与传统ＰＩＤ 控制相结合构成一种新的复合控制策略，应用于超低频标准振动台台面正弦波形的反馈控制上，获得了满意的结
补充资料：点振子振动和点电极振子振动
分子式：
CAS号：
性质：又称点振子振动和点电极振子振动。振动能量绝大部分集中在点电极范围内，形成“能量封闭”的振动模式。振子电极面远小于压电陶瓷片的总面积，且与厚度有适宜的匹配关系。在交变电场作用下，沿厚度方向产生振动，其振幅随着至电极中心距离的增加，呈指数式衰减。谐振频率与压电陶瓷片的厚度有关。为提高频率通常将压电陶瓷片磨得很薄，有时考虑到压电陶瓷自身强度太低，可用特制的陶瓷片作垫片来防止压电陶瓷片损坏。常用于高频场合。
CAS号：
性质：又称点振子振动和点电极振子振动。振动能量绝大部分集中在点电极范围内，形成“能量封闭”的振动模式。振子电极面远小于压电陶瓷片的总面积，且与厚度有适宜的匹配关系。在交变电场作用下，沿厚度方向产生振动，其振幅随着至电极中心距离的增加，呈指数式衰减。谐振频率与压电陶瓷片的厚度有关。为提高频率通常将压电陶瓷片磨得很薄，有时考虑到压电陶瓷自身强度太低，可用特制的陶瓷片作垫片来防止压电陶瓷片损坏。常用于高频场合。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条