Power amplifier is used in many fields, such as sound amplifier and electric vibration generator.

功率放大器在很多领域都得到了应用，比如音响、电动振动试验台等等。

Parameter calculation formulas about the new inertia vibration generator are also set up in this paper.

本文还建立了这种新的惯性激振器有关参数的计算公式。

This article offers some ideas to widen the using range and to open up new using field for hydraulic vibration generator system.

本文针对如何拓宽液压振动台的使用范围，开拓出新的应用领域提出了可供借鉴的建议。

In this paper, a new vibration generator for Inertia vibrating screen is described. It is theoretically proved effective in overcoming some disadvantages of the old vibration generator.

本文提出一种新的惯性振动筛的激振器，并从理论上证明了该激振器对克服原有激振器某些缺点是有效的。

In order to provide theoretical basis for the parameter of design on a new type of vibration generator, this parameter of design is seen as a double-body pendulum and mathematical model.

为了给一种新型振动机的参数设计提供理论依据，将其抽象为双物理摆的力学、数学模型。

Finally, the rotor and stator vibration of a type SDF-9 generator is measured in laboratory to verify the theoretical analysis presented above.

最后实测了SDF - 9型故障模拟发电机定、转子径向振动信号，与理论分析结果基本吻合。

The dynamic force generator is based on the vibration exciter which is used as the actuator to get the needed dynamic force with the corresponding signal generator and power amplifier.

测试平台系统的动态力发生装置是利用激振器作为执行器并配以相应信号发生电路和功率放大器来实现梯形动态力。

Mostly, vibration of a generator is caused by unbalance.

大多数发电机的振动是由不平衡引起的。

The dynamic properties of bearing support system has large influence on the vibration of large turbo generator unit.

汽轮发电机组轴承座动力特性对转子-轴承系统振动有比较大的影响。

In order to optimizing the vibration isolation of some diesel generator set, an analysis of the vibration character and excitation forces of it is presented through theory study and vibration testing.

通过对频响函数的测试，获得了某型柴油发电机组隔振系统各阶刚体模态频率和弹性模态频率，分析了该机组振源和振动特点。

The exciter vibration is a more general problem in existing operational steam turbine generator unit.

励磁机振动是汽轮发电机组运行中较为普遍的一个问题。

The key technologies of the power ultrasonic processing system, including ultrasonic power generator and vibration sys-tem, are introduced in the end.

最后，介绍了功率超声处理系统中超声功率发生器和换能振动系统等关键技术。

Its natural frequency falls into two parts when the loads exerted on generator rotor are asymmetrical. Dual resonance phenomenon appears based on the former single frequency vibration.

当发电机的外接负载不对称时，转子的固有频率一分为二，转子的振动在原来单频振动的基础上，产生了双重共振现象。

The electromagnetic damper studied in this paper belongs to a special kind of coreless generator, which is used for the energy absorption and dissipation in order to weaken vibration.

本文研究的电磁阻尼器是一种特殊结构的空心杯发电机，它主要用于对能量的吸收和耗散，达到减振消能的目的，是具有很高单位耗能的能量吸收元件。

The generator vibration characteristics caused by rotor winding interturn short circuit fault and imbalance fault are analyzed respectively.

分析了汽轮发电机转子绕组匝间短路故障和转子不平衡故障时定、转子径向振动特征。

The experimental results reveal the difference between helical tubes and straight tubes on flow induced vibration, and the design for 200MW HTR steam generator avoids large amplitude vibration.

实验结果表明，螺旋管管束的流体诱发振动响应与直管相比存在一定的差别； 200MW高温气冷堆蒸汽发生器的设计避免了管束的大振幅振动。

The device includes four modules, which are ultrasonic generator, half wave vibration system, rotary joint subassembly and tool system.

该装置主要由超声波发生器、半波长声学系统、旋转关节以及工具系统四大组件构成。

The torsional vibration of the large scale turbo -generator shaft system is the responsive result of the mechanical-electrical coupling.

大型汽轮发电机组轴系扭振是发电机机械系统与电网系统相互耦合作用的结果。

The fluidic piezoelectric generator is put forward based on general fluidic generator, which transforms vibration energy into electronic energy using piezoelectric effect.

射流激振压电发电机是在一般射流发电机的基础上提出的，它是利用压电效应将机械振动的能量转变成持续的电能输出。

The inherent frequency and modal testing about end winding of generator stator are introduced, the vibration of end winding on-line monitoring is analyzed, a personal point of view is introduced.

对发电机定子绕组端部固有频率的测试及模态试验分析作了简要的介绍，对端部绕组振动的在线监测作了简要分析，同时提出了一些个人看法。

It is concluded that the causes of sudden vibration are oil film whirl and thermal unbalance of generator rotor resulting from interturn short-circuit and hindered winding expansion etc.

认为突发性振动原因是运行中转子的油膜涡动和匝间短路、线圈膨胀受阻等引起的热不平衡。

In this paper, the vibration characteristics of frame foundation for steam turbine generator set is performed by model modal test method.

采用模型模态试验方法对汽轮发电机组框架式基础的振动特性进行了研究。

Fault features based on pattern spectrum were presented for analyzing tiny changes of energy and waveform of generator sets vibration and reflecting the trend of early faults.

为了分析发电机组振动信号在能量和波形方面的细小变化，从而反映发电机组的早期故障趋势，提出了基于数学形态谱的故障特征量。

According to the vibration features of hydraulic generator set, the paper discusses a method that is suitable for vibration fault diagnosis, namely fuzzy diagnosis method.

根据水轮发电机组的振动特点，探讨了适合于水轮发电机组的振动故障诊断方法，即模糊诊断法。

Presently, the method of steady state unbalanced currents is widely used in the field test of torsional vibration characteristics of large-scale steam turbine generator rotor system.

目前大型汽轮发电机组轴系扭振特性的现场试验中广泛采用稳态不对称短路变频激振法。

In this paper, the vibration characteristics of frame foundation for steam turbine-generator set are performed by model modal test method.

采用模型模态试验方法对汽轮发电机组框架式基础的振动特性进行了研究。