阻尼振荡

Following up the change of some parameters in AC systems, it can regulate the active power transmitted by DC link and damp power oscillation in s...

在交流系统受到扰动后它通过跟踪交流系统某些参数的变化来调节直流输送的有功功率，从而达到阻尼整个系统功率振荡的目的。

Considering the bounding surface plasticity constitutive model of soil, the program, named as WSDP, is coded to analyse the dynamic elastoplastic responses of two-dimensional soil layer.

讨论土体本构关系、土层应力历史状态、人工边界的设置以及为消除人工边界高频振荡而采用的黏性阻尼等因素对土层动力反应的影响。

By adjusting the trigger angle of thyristor, TCSC can regulate the reactance from capacitive to inductive mode continuously.

TCSC通过调节晶闸管的触发角，可以实现电抗值从容性到感性的较大范围内连续调节，不仅可以控制系统的潮流分布、阻尼低频振荡，而且还可提高系统的稳定性。

Usually, the damping ratio and undamped natural frequency may be specified by the

通常，阻尼比和无阻尼自然振荡频率是由闭环系统一对主

Where is undamped natural frequency, is damping ratio.

其中： 称为无阻尼自然振荡频率，成为阻尼比。

The simulating results show that TCSC can control the power flow, damp theoscillations on lines and enhance transient stability of power system. In steady state,TCSC can improve the transfer capability and lessen the loss on transmission lines. Intransient state, TCSC can damp the power oscillations and improve the stability.

仿真结果表明，TCSC具有潮流控制、阻尼线路功率振荡、提高电力系统暂态稳定等多种功能：稳态下，TCSC能增大系统的输送功率，并降低输电损耗；暂态下，TCSC能抑制系统功率振荡，提高系统稳定性。

Means resiliently connecting the blade subassemblies to each other and to the drive shaft for rotation with the shaft, said connecting means including viscoelastic means through which rotational movement of the shaft is transmitted to the blades, the viscoelastic means being loaded torsionally and stressed in shear to transmit said rotational movement while resiliently permitting and damping in-plane movements of the blade subassemblies relative to the drive shaft, the viscoelastic means also resiliently permitting and damping relative in-plane oscillations between the blade subassemblies.

手段弹性连接叶片组件向对方和向传动轴旋转与轴的说，连接方式，包括粘弹性透过何种途径旋转运动的轴转交给刀片，粘弹性的手段正在加载扭矩，并强调在剪，以转递说，旋转运动的同时，允许和弹性阻尼在平面变动的刀片组件相对到传动轴，粘弹性也意味着允许弹性和阻尼相对在平面振荡之间的叶片组件。

It is found thatthere exist three modes in a magnetized, homogeneous, and collisional dusty plasma:the wholly damped mode due to the thermal diffusion, damped electrostatic dustacoustic wave, and damped electrostatic dust cyclotron wavediscovered by the dissertation for the first time; As neutral gas pressure increases,the damping rates of the EDA and EDC waves increase; The effects of dust densityon the EDA and EDC waves are remarkably different from unmagnetized orcollisionless plasma; A possible explanation to plasma crystallization is suggestedon the basis of the present results.

EDA的阻尼速度随中性气体压强的增大而增大，这一点与实验相符，对于EDC也存在同样的关系。尘粒密度对EDA波和EDC波的影响明显不同于非磁化或者无碰撞尘埃等离子体中的情况。当忽略碰撞时，阻尼的EDA和EDC波回到纯振荡波。最后就尘埃等离子体晶化给出了一个可能的解释。

Simulation results show that this supplementary controller efficiently damps the power oscillation among areas,improves system stability,and has better robustness in various operation modes than the conventional supple-mentary damping controller.

仿真结果表明，与传统的阻尼控制器相比，基于强化学习算法的直流附加阻尼控制器能够有效地抑制区域间的功率振荡，提高交直流系统的动态稳定性，并且对多种运行方式具有一定的鲁棒性。

The following exciting results are derived: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer, Unified Power Flow Controller and Static Var Compensator as well as using real parameter values of power systems in simulation , the SNB surface and the HB surface on the boundary of small signal stability region will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability, so that a power system with mass shunt compensators is easily subjected to the oscillatory instability.

同时发现：1 系统中的慢速励磁，在某些情况下会与并联补偿电容器组产生负阻尼现象而显著降低系统的动态性能，大大增加系统出现振荡失稳的可能性；2 在采用较多并联电容器组补偿的电力系统中，更容易出现振荡型失稳。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。