阻尼振荡

In this paper, using transient energy function as the assessment of system stability and applying the derivative of TEF to determine the control strategy of Fault Current Limiter with controllable series compensation in transient stability process, the transient stability characteristics can be effectively improved and subsequent oscillation can be quickly damped.

1引言具有可控串联补偿功能的故障限流器(FCL with controlled series compensation)作为灵活交流输电的主要装置之一，装设在并行线路具有许多优点。如图1所示，正常工作时，它能连续、快速、大范围地调节线路阻抗，从而灵活调节线路电流、增强系统阻尼、改善系统动态性能、抑制次同步振荡。

In the non dimensioned time domain,the generalized quadratic performance criterion of error state transits into the optimal problem of structural parameters,thus gets an optimal parameter system—optimal damping control system with big margin for stability,little number for oscillation,small overshoot,and small setting time.

在无量纲时域中，把状态误差的广义二次型性能指标转换成结构参数的优化问题，从而得到一种稳定裕度大、振荡次数少、超调小、调节时间短的最佳参数系统——最佳阻尼控制系统。

Forced oscillation test results of rolling table show that the theoretical analyses are good in accordance with test results under condition of the different vertical location of tank within the ship, different water level of wing tanks and different opening of the damping baffle respectively.

结果表明，研制的试验摇摆台能够模拟在波浪作用下船舶横摇运动，设计的被动式U型减摇水舱具有一定的减摇效果；试验确定的水舱固有频率与理论估算值符合；对不同垂直位置布置、不同边舱液位高度和不同阻尼挡板开度情况下摇摆台的强迫振荡试验表明，理论分析与试验结果具有很好的一致性。

In later following experimental researches performed, this paper summarized the approaches applied to the time-domain and frequency-domain analysis of dynamic pressure and dynamic chemiluminescent density.

然后总结了燃烧室中热声振荡的相关判据和驱动和阻尼机理以及理论和模型分析方法。并阐述了本文的实验研究应用的动态压力和动态化学发光强度等动态数据的时域和频域分析方法。

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。