振动器

Because any reports on the active control of rotating disk haven't be seen in China up to now, and this experiment research is important, so the complete set of active control system of rotating disk are built independently. The push-pull type electromagnet is applied to control the vibration of the circular disk. The power amplifier circuit that can respond to wide scope in frequency from DC to AC is designed by improving the existing circuit. The sensor signal is first low-pass filtered, then the proportional control plus the differential control circuit easy used in practice are applied to finish the more effective control. The electromagnetism shield is used as possible to decrease the signal disturbance from the electromagnet to eddy sensor.

考虑到目前国内尚未见到有关旋转圆盘振动主动控制的相关报导以及实验的重要性，自行设计制作了一整套旋转圆盘振动主动控制系统：提出并采用推拉型电磁作动器来控制圆盘的振动；在改进现有电路的基础上，自行设计了具有较理想特性的驱动电磁作动器的功率放大器；根据实际控制环境的特点，设计了先进行低通滤波，再采用比例和实用的近似微分电路构成的控制器，并采用了电磁屏蔽来减小电磁铁对传感器的干扰，以实现更有效的控制。

The automatic identification of vibration, the composition of control forces with different frequencies, the controlalgorithm and process are studied. 4. The nonlinear property of active magnetic actuator , the major part of rotor vibration control system, is investigated.

针对旋转机械一些故障引起的多频振动问题，以及目前各种平衡头只能控制工频振动，对其它频率成份的振动无能为力的这一情况，提出用电磁执行器进行多频振动的前馈自学习控制方法。

Continuous casting experiments results show that in the mold oscillation coupled with AMMF EMCC, imposition of AMMF duty part during mold oscillation positive strip can deduce the withdraw resistance and improve the billets surface.

论文的第三部分，基于以上的一些研究，提出了又一项新的技术——调幅磁场下无结晶器振动电磁连铸技术，以期用结晶器外调幅磁场电磁力的振动来取代庞大的机械振动系统。

In the third part of the paper, another novel technology, named as Mould Oscillation-less Electromagnetic Continuous Casting under AMMF was proposed in order to replace the huge mechanical mould oscillation system by AMMF imposing outside the mould in continuous casting.

进行了三种波形高频调幅磁场下的无结晶器振动电磁连铸初步实验研究，实验结果表明：在方波、三角波和正弦波调幅磁场作用下的无结晶器振动电磁连铸过程中，当调制波频率略低于系统固有频率时，弯月面与结晶器壁间断接触距离最大。

The first-step research work of electro-hydraulic servo oscillation system on Baosteel Continuous Casting Testing Platform is introduced.The results of hot-test show that the oscillation system runs reposefully and reliably.

0前言现代连铸技术的快速发展，对结晶器振动技术的自动化水平，以及振动与工艺的适应柔性都提出了更高的要求，促成了结晶器液压振动技术的产生。

An allocation optical fiber sensor comprises signal treatment circuit, sensor optical cable, supernarrow wide laser, two detectors, three offsets, four couplers, four wave-length division multiplex, superradiation LED, polarizer and phase adapter, Sagna conoscope and Mach conoscope shares No1 sensitive optical fiber LB with the third wavelength division multiplex through the first wavelength division multiplex, the second wavelength division multiplex shared with the fourth wavelength division multiplex the second sensitive optical fiber to form the hybrid conoscope.

本发明公开了一种分布式光纤振动传感器，由信号处理电路、传感光缆、超窄线宽激光器、两个探测器、三个消偏器、四个耦合器、四个波分复用器、超辐射发光二极管、起偏器和相位调制器组成；在本发明中构成的萨格奈克干涉仪和马赫-泽德干涉仪，通过第一波分复用器与第三波分复用器共用第一敏感光纤L B ，第二波分复用器与第四波分复用器共用第二敏感光纤L C 形成了混合干涉仪。

This paper presents a new device, which use MR dampers to control vibration of the bridge.

本文提出一种新的装置，把MR阻尼器应用在桥梁的振动控制中，减小桥梁的竖向振动，并通过算例分析桥梁在移动荷载作用下的振动控制效果，验证用这种装置控制桥梁的竖向振动是行之有效的。

In this paper,using mild steel plate have stable hysteresis under loading and unloading repeated cycles,designed a U shape mild steel plate damper,an hysteresis loop and analytical model was carried out by experimental test At last,this damper is .

振动控制是结构抗震防灾的一种积极有效手段，目前对于大跨空间结构的振动控制技术不是很成熟，利用软钢板在反复循环荷载作用下具有稳定的滞回特性，设计了U形软钢板阻尼器，通过试验得出该阻尼器的滞回曲线，建立了该阻尼器分析模型。

ObjectiveTo observe the effect of vibration massage apparatus on skin temperature by infrared thermal imaging system .

目的用红外热像仪观察机械振动按摩器对人体局部温度的影响，从客观数据上证实其有效性，为振动按摩器最佳振动频率的确定奠定基础。

The Acupuncture and Tuina College of Shanghai University of TCM,Shanghai 201203,ChinaAbstract:ObjectiveTo observe the effect of vibration massage apparatus on skin temperature by infrared thermal imaging system .

目的用红外热像仪观察机械振动按摩器对人体局部温度的影响，从客观数据上证实其有效性，为振动按摩器最佳振动频率的确定奠定基础。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。