振动周期

In this paper, the effect between the choice of scaling gains and the control result is discussed.

研究结果表明，所采用的模糊逻辑控制方法对于周期和柴油机振动信号均有较好的控制效果。

It is found that, the greatest amplitude of each seiche event occurs mostly during the high or low tides.

中文摘要：收集和分析了南海北部沿岸15个海洋站所在港湾发生假潮的资料，并对其中较大振幅的典型假潮个例，进行了港湾基态自然周期分析和假潮振动的频谱分析。

As a pneumatic self-excited vibration system, pneumatic vibrator bifurcation phenomena are studied for the first time.

首次研究了这种气动自激振动系统的分叉问题，得出了产生分叉和倍周期运动的参数条件。

Vibration reduction effect of parametric oscillation of stayed cable with linear viscous damper under simple harmonic support motion is investigated in the paper neglecting cable-bridge interaction.

本文以斜拉索为研究对象，忽略索桥之间的耦合作用，研究在支座沿弦向方向的周期运动下，线性粘滞阻尼器对斜拉桥拉索参数振动的减振效果。

With the help of the multi-resolution analysis, the singular part in the vibrational signal is abstracted to distinguish the periodic signal, so the useful information for fault diagnosis is got.

将小波分析技术应用到车辆变速箱的奇异点检测中，通过多分辨率分析提取振动信号中的奇异信号，将其周期信号分开，为故障诊断提供了有用的信息。

After that, numerical examples of period vibration and destroy of the spherical shell are presented.

给出了球壳产生周期振动和最终被破坏的数值算例。

The effects of material imperfection on period vibration of the spherical shell are discussed.

讨论了材料的缺陷参数对球壳产生周期振动的影响。

A feedforward adaptive control system based on ARX model description has been developed and applied to the control of structural vibration excited by Pseudo-periodic signals.

发展一种基于ARX模型描述的实时自适应前馈控制系统，并将其应用到具有拟周期扰力的结构振动控制中。

The larger subharmonic component will be introduced into the system after the instability of system periodic motions, the motion of systems will be nonsynchronous precession and the amplitude of alternate stress in the rotor shaft is high. The long-term existence of instability will directly threaten the safe running of the rotor systems. Research on the influence of the change of system parameters on the system dynamical behaviors, the stability of system periodic solutions with the change of system rotational speed and the system motion after instability will have the theoretical and engineering-oriented significance for the long-term safe running of large-scale rotating machinery.

转子系统失稳后会产生较大的低频振动分量，系统运动出现非协调进动，系统转轴中会产生幅值很大的交变应力，转子失稳状态的存在直接影响系统的安全运行，因此研究转子系统自身参数的变化对系统动力稳定性的影响，研究系统周期解随工作转速的变化情况及其失稳后的运动规律，对大型旋转机械的安全稳定运行具有重要的理论意义和工程实用价值。

Beach groundwater table fluctuates with tidal oscillations in coastal unconfined aquifer. The period-averaged water table height is higher than the steady-state water table with the neglect of tidal effects. That is, there exists an overheight between the two.

潮汐海平面上下波动带动毗邻的滨海地下水水位振动，对达到动态稳定后的地下水水位作周期平均后，其位置高出不考虑潮汐作用的稳态水位，即潮汐影响下滨海地下水水位存在超高。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。