转速

There are two cases to define the failure. One is the rotor system can not to strit over the critical speed, and the other is arising the bistable characteristic.

并定义了两种失效的情况，一是转子系统过不了临界转速，二是出现双稳态特性。

Among many oter things,I Taking the machine rotation rate as a control quantity of the subcontrol circuit,a set of PID cascade control system was designed.

介绍连体膨胀压缩机的工作原理，并综合透平膨胀机和离心式压缩机的调节特点，结合连体膨胀压缩机的结构，采用压力反馈、进口节流的调节方式实现对系统恒压输出的控制，其中将机器的转速作为副控制回路的被控量，由此设计一套PID 串级控制系统。

Using GPS merely as an auditing tool is no problem, because the OBU only has to determine its position every now and then. Tachograph and GPS data are saved on a smart card, which is then sent to the customs authority or its content downloaded online.

转速表和计速器上的信息存在一张智能卡上，智能卡会被送到海关或用以在线下载的信息储存设备。

It is seen that the predicted and measured tailpipe noise match very well in low engine speed.

在整个计算过程中，在发动机全负荷的工况下，发动机转速由4000r/min加速到8000r/min。

At high r/min, flow speed is high, the friction noise dominates tailpipe noise.

在高转速阶段，气流速度也比较高，这时气流摩擦噪声决定尾管噪声。

His paper deals with the purification of tetrabromoethane by continuous countercurrent scrub-bing with annular centrfugal extractor.

研究了离心萃取器的转速和重相堰直径在四溴乙烷一水体系中对洗涤效果的影响，并得到了优化参数。

In this study the immobilisation of Thiobacillus ferrooxidans on the activated carbon particles as support matrix was described.

通过正交实验，发现该菌株在250mL锥形瓶中振荡培养的最适条件为pH7.0、温度30℃、转速200r/min、装液量100mL。

At first,the prin ciple of BLDCM is analyzed and the model is built;then a test is performed on a tining system of close loops of speed and current;torque ripple components are r educed by controlling switching andles of the PWM.

文中首先建立永磁无刷直流电机的数学模型，以此进行转速和电流双闭环调速系统控制；并通过调节 PWM发生器的开关频率来减少转矩脉动。

In this paper the nonstationary vibration behavior of an unbalanced rotor system, which is assumed to be bending flexible but torsionally rigid, during acceleration or deceleration through the critical speeds is investigated. Influencing factors such as gyrascopic effects, external and internal damping, Supporting mass, damping and stiffness, asymmetry of the shaft crass section as well as anisotropy of the supports are considered.

在理论分析方面，本文考虑了转子的陀螺效应，内外阻尼，轴截面的非对称性，支承的貭量、阻尼、刚度和支承的各向异性等因素的影响，使用分析动力学，建立起严格的运动方程，并考虑了弯曲自由度与转动自由度间的耦合，因而能较精确地分析和描述转子通过临界点时的非定常振动和转速变化規律。

Aero-engines are developing in the miniaturization, totalization, high performance, and high dependability direction.

设计了智能装置的硬件电路、封装外壳和相关软件，在实验室环境下研制完成了智能温度传感器、智能压力传感器、智能转速传感器和智能位置控制器。

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