扰动

The governor is designed with model structure. Closed-loop start-up strategy is applied during running and it realizes three adjust mode-frequency, wicket gate and power.

调速器采用模块结构进行设计，在调节过程中实现了闭环开机控制策略，并可在频率调节、开度调节、功率调节三种调节模式之间自动或手动无扰动切换。

Reaction wheel is one of the main disturbance sources that affect the precision of attitude control system of spacecraft.

反作用轮系统是影响航天器姿控系统精度的主要扰动源之一。

The theory of the reaction wheel is introduced at first,then the invariability theory of disturbing compensation and the math description of feed forward control.are recommenoled feed forward control and dead voltage compensation are added in the model of reaction wheel control.

中文摘要：对星载二维转台中反作用轮的控制技术进行了研究。介绍了反作用轮的作用原理，给出了扰动补偿的不变性原理和前馈控制的数学描述。

The existence and well-posed ness results for a class of perturbed optimization problemsin a Banach space are given, and the relationships between the strict Kolmogorov Criterionand the uniqueness elements of a sun in vector-valued function spaces are established.

本文研究Banach空间中的一类扰动优化问题的适定性和向量值函数空间中太阳集的唯一性元的严格Kolmogorov条件刻划。

The rate gyro feedback provides positive dynamic stability and well-damped transient response to commands or disturbances.

速度陀螺反馈提供正向动力学稳定性和对于指令式扰动的很好阻尼的瞬时响应。

The rate gyro feedback provides positive dynamic stability and well-damped transi t response to commands or disturbances.

速度 陀螺反馈提供正向动力学稳定性和对于指令式扰动的很好阻尼的瞬时响应。

Moreover, blobs may move too close to the boundary because of advection errors or other numerical errors. It may cause serious fluctuations in evaluating the strength of the vortex sheet. In order to reduce the fluctuations, these near-wall blobs are also manipulated in use of the concept of "residual vorticity". Finally, we apply the so-developed solver to a simulation of the flow past an impulsively started circular cylinder at different Reynolds numbers.

此外既有涡泡也可能因对流或其他数值误差造成过於靠近边界，因此我们也设计一专门处理过於靠近边界涡泡之方法，以其他计算元素取代这些涡泡，降低进入物体内部之环量，进而降低涡片强度计算上的扰动。

Streamwise vorticity, which forms in the braid zones where small three-dimensional perturbations grow strongly because of the extensional strain formed by vortex ring, collapses into counter-rotating round vortex tube.

辫子区内小扰动在涡环形成的拉伸应力的作用下快速增长，形成流向涡结构，并不断增强形成流向涡管。

To solve the velocity potential,we used an integro-differential equation.

采用关于扰动速度势的基本积分微分方程，并采用双曲面形状的面元以消除面元间的缝隙。

Using the two-stream fluid model, the linear dispersion relation is derived assuming a two-dimensional spatial geometry. Two cases are considered, one is that the 2D spatial geometry is defined by the plane containing the two counterstreaming electron populations and the perturbation wave vector , and the other is that the geometry is defined by the plane being vertical to the two counterstreaming electron populations .

对高能束流和电子回流构成的双流系统，建立冷等离子体流体模型，采用简正模分析方法，分别考虑扰动波矢在平行于电流传播方向的平面上和在垂直于电流传播方向的平面上这两种情况，推导了不稳定性的色散关系。

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