查询词典 torsional

Based on the shaft partial energy function of the turbine\|generator shaft torsional oscillation.

利用表征重合闸操作影响发电机轴系扭振幅度的等值能量函数，导出了瞬时性故障与永久性故障下重合闸操作对轴系冲击最小的理想重合时刻。

This thesis entirely analysed the torsional oscillation characteristic of the engine and the power train the method both in frequency field and in time field with dynamic simulation soft of AMESim 4.2.1 from france.

摘 要：以某12缸V 型发动机为例，借用法国AMESim4.2.1动态仿真软件，采用频域和时域分析方法，分析了要发动机和传动系统扭振的特点。

Also a fatigue loss program is developed to evaluate each fault's fatigue loss. Then we use this method to research a real SC power system's shaft torsional oscillation problem.

最后建立一新型输电网络模型，研究新型的输电系统如串补输电系统故障对发电机轴系扭振的影响。

Due to the electro-mechanical coupling, the subsynchronous oscillation occurs in the system,which causes the oscillation of electric current, electric voltage and the torsional oscillation of the set of axes.

网机系统机电耦联失稳振荡的分岔与混沌研究项目，共发表学术论文30篇（期刊论文23篇，会议论文7篇），其中SCI收录3篇，EI收录9篇，ISTP收录3篇，使我们的研究大大超额完成任务。

Based on the whole trip-reclosure process and considered the two important targets,the stability of power system and the shaft torsional oscillation of generators,a scheme of optimal trip-reclosure process were all proposed.

针对输电线路继电保护跳闸—重合闸电气操作全过程，综合考虑电力系统稳定性和发电机轴系扭振两项指标，提出了最佳跳闸—重合闸过程。

As the development of the power industry, the generator unit has larger capacity and the shaft becomes more flexible, also the interconnected power gird is huger and more complicated, which make the torsional oscillation problem between the unit and grid more and more notable.

随着电力工业的发展，一方面发电机组单机容量大型化、轴系柔性化，另一方面互联电网规模大型化、结构复杂化，这种趋势使得大机组和大电网的扭振相互作用问题突出出来。

A torsional oscillation observer based on the general observer was discussed to estimate the speed of the turbine generator. The dynamic characteristics of standard Luenberger observer with quantization effects were studied by Lyapunov stability criterion. It is concluded that the state estimate error can not asymptotically converge to zero in-the-large in presence of quantization effects.

讨论了基于状态观测器的汽轮机轴系扭振测量方法，采用李亚普诺夫稳定性判据分析存在量化效应的条件下标准龙贝格观测器的动态特性，指出由于数字系统中的有限字长效应会使观测器的跟踪性能恶化，估计误差不能在大范围内渐进收敛。

The torsional oscillation problem will make the shaft endure big torque time and again, which produces the fatigue life loss and even makes the shaft broken.

机网扭振相互作用会使机组轴系反复承受较大的扭矩，从而造成疲劳寿命损耗、甚至直接损坏。

Then we use IEEE First Benchmark system model and the 500kV system which contain 500MW and 600MW turbo-machines, as typical examples, the shaft systems without exciter in these examples are also analyzed on its impact on torsional oscillation.

首先对采用静止励磁方式的汽轮发电机轴系建模进行了说明；然后以IEEE次同步谐振标准模型和东北电网中伊敏电厂计划安装的500MW和600MW汽轮发电机组为典型算例，研究了改用静止励磁方式对轴系扭振的影响。

Axial-system torsional oscillation Hopf ramification Nonlinear dynamic state Characteristic root analysis

轴系扭振； Hopf分歧；非线性动态；特征根分析

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐