rotor speed

And the function relation is established between turn-off angle and rotor speed in order to reduce the torque and increase the torque.

以降低转矩脉动，提高平均转矩为目标，建立了最优关断角与转速之间的函数关系；

Theoretical analysis and simulation result show that the recommend cascade control system has the better performance in both steady and transient responses. Furthermore, the rotor speed rise caused by turbine throwing off the load is restrained effectively with the cascade control system.

理论分析与数字仿真试验表明该串级控制系统可以得到很好的稳态控制性能和动态控制性能，同时对机组甩负荷所造成的转速飞升现象也能有效地抑制。

For this problem, the method of torque selection according as the range of rotor speed variety is proposed.

基于此问题，本文根据电动机转速变化范围来选择合适的转矩控制区间的方法。

The design of helicopter and advanced high speed tilt-rotor aircraft is addressed using a series of optimization procedures.

本文研究最优化设计技术在直升机和倾转旋翼机设计过程中的应用。

By this method, the characteristics of tilt-rotor aircraft flowfield in hover are investigated. Also, further investigations are conducted to simulate the flowfield of tiltrotor aircraft at different forward-flight speed conditions.

应用该方法，着重研究了悬停状态下倾转旋翼机的流场特性，并对不同前飞速度时的流场也进行了数值分析。

The technical difficulty is accurately controlling the low-pressure rotor speed through adjusting nozzle throat area.

技术难点在于通过调节喷管喉道面积,精确控制发动机低压转子转速.

Abstract The paper introduces the situation of rotor spinning technology, the equipment level of homemade rotor spinner, the process lines of difference rotor yarns and the spinning range, economic count of vary rotor speed, and points out the products developing trend later in the paper.

介绍转杯纺纱现状、国产转林纺纱机设备水平，各种转杯纱所采用的不同工艺路线，以及不同纺杯转速下的适纺、经济号数，并提出产品方向。

Then, the structure and dynamic models of improved constant rotor speed control system using electric field method are proposed.

在此基础上，提出了改进后的球形转子电场恒速控制系统的结构和动态模型。

Experimental results show that the designed classifier has many advantages of high training speed, short test time and high classification accuracy on fault diagnosis for rotor systems online.

将该方法应用于转子系统在线故障诊断中，结果表明，所设计的算法具有训练速度快、测试时间短、分类准确率高等特点。

The system motion turns to quasi-period from equilibrium, and this is true for cracked-rotor at the cracked rotor oil film critical instability rotational speed.

裂纹转子在油膜临界失稳时的系统运动亦为拟周期运动。

Synchronous generator rotor speed control system of the new measurement methods Matching of ESC and TWC

同步发电机原动系统转子转速测量新方法发动机电子控制系统与三元催化转换器的匹配

The close-loop control modal based on J-M strategy needs the rotor speed as feedback signal. More researches on the area are needed to combine J-M control strategy with sensorless vector control system.

但是基于J-M变换矢量控制策略的闭环控制模型需要电机转速信号作为反馈信号，因此要与无速度矢量控制系统结合使用还有待研究。

The standard samples of the metals and non-metals are separated by an eddy-current separator, and a separation efficiency of 95% can be obtained when the operation factors, mainly feeding speed, rotor speed and belt rotational speed, are proper.

利用涡电流分选机对铜、铝和塑料的标准样进行了分选，通过调节进料速度、转子速度和皮带转速，可以得到分选效率达到95%以上。

The embedded RTOS μ C/ OS-II was repot to EEC controller for the distributed rotor speed control system with the processor of 2407A.

此外还将嵌入式实时操作系统μC/OS-II移植到2407A上，并针对分布式转速控制系统中的EEC控制器进行了多任务设计。

Fault-tolerant control scheme for rotor speed sensor of a turbo-shaft engine and full authority digital engine control ( FADEC) was studied.

以某型涡轴发动机为对象，对转速传感器失效状态下全权限数字电子控制系统（FADEC）采取的控制对策进行研究。

Then, turnover was introduced based on the working principle of soft starter, through the speed motor rotor speed to change change within the gear ring cycle gear train speed, in order to realize the soft starter of belt conveyor.

然后，介绍了基于周转轮系软起动装置的工作原理，通过调速电动机改变转子转速来改变周转轮系内齿圈的转速，以实现带式输送机的软起动。

The speed-regulation is working under d-q coordinate system of rotor, and takes rotor current component as orientation control, so there is no need to test the initial position of the rotor.

速度调节在转子d-q坐标系下进行，以转子电流矢量进行定向控制，所以无须检测转子初始位置，这样便构成了无速度传感器转子变频控制系统，提高了系统的可靠性。

Effects of operating condition on the frequency characteristic of rotor tip leakage flow in an low-speed axial compressor

低速轴流压气机中工况变化对动叶顶部泄漏流波动频率的影响

For water, both the ratio of flow boundary layer thickness to film thickness and that of temperature boundary layer thickness to film thickness reach the minimum value under high rotor speed or the optimum feeding rate.

高转速或最佳进料量下，纯物质水流动边界层与膜厚之比及温度边界层与膜厚之比均最小，流动边界层与温度边界层存在内在联系。

Study of Thyristor Cascade Speed Control in a Medium/ Small-Scale Wound-Rotor Induction Motor

中小型绕线式异步电机可控硅串级调速系统的研究

OPTIPACT motion sensors are compact, robust and ideal for primary or backup rotor speed regulation.

OPTIPACT运动传感器结构紧凑, 稳健,是主要的或备用转子速度调节的理想选择.

In addition, rotor speed can get by using displacement sensor, which can engender pulse signal.

另外转速也可由位移传感器测得的脉冲信号获得，该脉冲信号的获得则可利用转子上的键槽。

The dynamic deflection may become very large due to resonance in case of the flexible rotor speed approaching or exceeding its1st or2nd order critical speed.

而挠性转子在接近或超过其第一、二阶临界转速时，转子处于共振状态，这时动挠度达到很大的数值。

The Euler/ Kirchhoff method is adopted to calculate the far field noise of UH-1H rotor, and the calculated results are compared with the measured data. The effect of rotor blade tip shape on high speed rotor noise is investigated.

采用CFD与计算声学相结合的Euler Kirchhoff方法对UH-1H直升机旋翼跨声速悬停流动的远场噪声进行定量计算，并将计算结果与实验值进行比较，验证了Euler Kirchhoff方法的正确性。

The result shows that reasonable processing parameters of spinning soybean protein rotor yarn are twist factor 360, rotor speed 38 000 r/ min, combing speed 7800 r/ min. Use these parameters, better evenness and better elastic can be got.

结果表明：纺制大豆蛋白纤维转杯纱的合理工艺参数为捻系数360，纺杯转速38000r/min，分梳辊转速7800r/min，所纺制大豆蛋白纤维转杯纱条干均匀，纱线弹性好。

By the method developed, both rotor thickness and loading noise are computed. The influence of different design parameters on the rotational noise, such as rotor speed, blade number and rotor diameter, are also investigated.

应用所建立的方法，分别进行了旋翼厚度和载荷噪声的计算，并对旋翼转速、桨叶片数、旋翼直径等不同设计参数对旋转噪声的影响进行了研究，得到了一些有实际意义的结果。

A distributed aeroengine rotor speed control system is composed, with the unattached smart devices, and soft of the smart devices was designed.

将分立的智能器件组成航空发动机分布式转速控制系统，设计了智能器件的软件。

This term came from the requirement of Z-X helicopter refinement, to regulate and stabilize the rotor speed under all kinds of flight status automatically.

本课题来源于某型直升机改进型号的旋翼转速性能需要，通过该设备完成不同的飞行状态下直升机旋翼转速的自动调节，使直升机具有最佳的操纵控制性能。

The rotor speed was increased gradually over the range of 0~ 24 000 r/ min and decreased naturally with the power closed.

试验转子从0逐渐加速到24000r/min，然后切断电源自然降速。

Based on the designed thin film evaporator, the influence of the rotor speed, feed rate and liquid inlet temperature on evaporation length and film heat transfer coefficient was primarily discussed using the software CFX 4.4 with water as feed liquid.

针对自行设计的薄膜蒸发器，以水为物料，采用大型CFD软件CFX4.4，初步探讨了刮板转速、进料量、进料温度等参量对薄膜蒸发器蒸发段长度和加热段膜内传热系数的影响。