振动

The motion state and grinding theory of milling medium in tube object of vibrating mill are analyzed in this paper.

分析了振动磨筒体内研磨介质的运动状态及粉磨机理，在此基础上，从能量观点出发，对振动磨整机的功率消耗进行了研究，并提出了计算振动磨机功率的理论公式。

The slower vibration of the last tuning fork, is a perfect image of the vibration of the higher

最后音叉的较低的振动是更高级音叉振动的一幅完美的图像，只是它的每个时间单元的振动速率已经减缓下来。

The fluctuating deviation of bed voidage and theenhancement index of bed uniformity derived in this study can describerespectively the bed uniformity and its extent. A new criterion of demarcationof uniformity, composed of materialparameter, operating parameters (H0, u/umf) and vibrationparameters, can be used to predicting a suitable range ofbed uniformity.

对空隙率波动偏差的分析表明，振动参数、颗粒物性和操作参数均对床层均匀流化行为有不同程度的影响，且振幅和振动频率越大越能明显提高以小米或玻璃珠为物料的床层的均匀稳定性，而颗粒物性和操作参数直接影响振动能量在床层中的传播。

And more seriously,an over complex analysis model may cause the structuralanalysis to be very difficult or even unrealizable.

如在大型复杂结构的振动模态分析、振动控制、非线性振动和响应等分析中，过于复杂的结构分析模型将使这些分析变得十分困难。

A low frequency rolling bearing fault diagnosis method based on local projective noise reduction;2. According to characteristics of both the vibration signals and the stator currents when appering a fault in the rolling bearing of the induction motor,Park vector module signal of the three-phase current is calculated,and the envelope of vibration signals from the rolling bearing of the motor is analyzed.

根据感应电机轴承发生故障时的振动信号特性以及定子电流特性，求出三相电流的Park矢量模信号，并将其与电机滚动轴承振动信号经解调处理后的包络信号进行融合分析，可以从振动信号与电流信号的融合谱图中有效地提取轴承故障特征信息，并将其作为故障识别的依据。

The techniques are developed to fabricate such vibration generator. A prototype is fabricated.

进行了振动式发电机的工艺研究，完成了振动式发电机的工艺设计和工艺试验，研制出了微型振动式发电机实验样机。

A method/system for controlling helicopter vibrations is provided that includes a vibration canceling force generator for actively generating a vibration canceling force.

一种方法/系统的振动控制提供直升机，其中包括取消武力振动发生器产生的振动主动取消生效。

Then the creative research work on ultra-low frequency and large amplitude elcectromagnetic vibrator based on moving magnet is done, improving exciting signal at ultra-low frequency, and, the theoretic analysis and experiment model are studied. Thus, the reference for establishing ultra-low frequency standard vibrator in future is provided. In chapter 5, two control strategies for ultra-low frequency standard vibrator test table waveform are studied.

首先采用机械振动隔振理论，研究设计了机械低通滤波器来滤除噪声信号，并运用等效的小振级信号进行了实验研究，得出了有益的结论；然后为提高超低频时激振信号，作者创造性地提出了动铁型大位移的电动振动台结构，进行了理论分析和实验模型研究，为将来建立大位移的超低频标准振动台提供了参考。

A new multi-degree of freedom ultrasonic motor using in-plane deformation of lead zirconate titanate elements was introduced.

介绍了一种新型基于压电陶瓷平面内应变特性的多自由度超声波电机，该电机通过两个平面内的弯曲振动模态的叠加实现转子绕Z轴的转动；并利用伸缩振动模态分别与上述弯曲振动模态叠加实现转子绕X轴和绕Y轴的转动。

In order to obtain the environmental vibration's characteristics of attenuation with distance and that of frequency in test study, a good many of tests is carried out on propagation and attenuation of environmental vibration for typical zone of the Pearl Line.

在实测研究方面，为得到高架轨道交通引起环境振动的距离衰减规律以及振动衰减的频率特性等，针对上海市明珠线高架轨道交通的典型线路区段，进行了大量环境振动实测及其传播和衰减规律研究。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。