转速

For improving mixing quality and efficiency,authors gave out definition of mixer rotation speed and its rationality criterion.With the help of theoretical analysis and experimental research,authors discussed the relations among mixer rotation speed with concrete homogeneousness,type of mixer,mixing power and mixing materials and revealed the rational range of mixing speed during mixer designing and using.

为了提高搅拌质量和效率，给出了搅拌机转速的定义和评判搅拌机转速合理与否的准则；采用理论分析和试验研究相结合的方法，分析了搅拌机转速与混凝土均匀度、搅拌装置类型、能耗和被搅拌材料的关系，给出了搅拌机设计和使用时合理转速的范围。

In order to measure instantaneous rotation speed, the rotation speed of the shaft in the spatial coordinate system is investigated and the measurement model for measuring instantaneous rotation speed of rotation mechanism is proposed.

为了测量瞬时转速，对旋转体转速在空间坐标系中的关系进行了研究，并建立了旋转机械瞬时转速测量模型。利用线阵CCD技术设计了一种新型光学瞬时转速测量系统。

The software of this system written in C programming language mainly, follow the principles of modular design, including the speed measurement, speed PWM drive, speed PI-conditioning, speed display, keyboard input, and other procedures module. The code has easy maintenance and great probability.

系统软件主要使用C语言编写，遵循模块化设计的原则，编写了转速的测量、转速的PWM驱动、转速的PI调节、转速的显示、键盘输入等程序模块，程序代码具有良好的易维护性和可移植性。

The software of this system written in C programming language mainly, follow the principles of modular design, including the speed measurement, speed PWM drive, speed PI-conditioning, speed display, keyboard input, and other procedures module.

系统软件主要使用C语言编写，遵循模块化的原则，编写了转速的测量、转速的PWM驱动、转速的PI调节、转速的显示、键盘输入等程序模块，程序代码具有良好的易维护性和可移植性。

Using the 294cc rotary engine, it can influence the maximum rpm and power of the engine output under the terms of using all kinds of length intake. Then it can find out the best length of intake of the rotary engine. In addition, under the terms of space limit of intake, it can influence the maximum rpm and power of the engine output when the intake is forced to limit on a certain length. To install a resonance in the intake system, according to the equation of Helmholtz, it can design the all kinds of size of the resonance. Using to change the volume and geometirc form of the resonance, it can find out the maximum rpm and horsepower of engine output in order to reduce the influence of the variation of engine intake length. Under the verification of the experimental result, this simple device can increase the rpm and horsepower of the rotary engine obviously to achieve the output performance that the engine requires to supply. Such the revisal of intake need the lower cost but it can obtain very obvious efficiency. It is a very feasible way.

藉由一具294cc的飞行器引擎，在使用各种不同长度进气道的条件下，对引擎所能输出的最大转速及马力有一定的影响，藉此找出该具引擎的最佳进气道长度；此外，在进气道因空间限制的前提下，进气道被迫只能局限某个长度以下时，在这种条件下，引擎所能输出的最大转速与马力等相关性能会随之受到影响，在进气系统加装一个共振腔，配合Helmholtz的方程式，设计出各种共振腔各部位的尺寸，利用改变共振腔的体积与几何形状，可以寻求增加引擎转速与输出马力的最大值，藉此降低进气长度变化所带来的影响，在实验结果的验证下，此一简单的装置可以明显的增加引擎转速与马力，以达到对引擎所需的输出性能要求，这样的进气系统修改所需的费用极低，但却可获得很明显的功效，是十分可行的方式。

This paper consider centrifugal force and coriolis force for ideas of Planetary LabCD Valve Model and Single Point Fluid Separation Model, then the relation of critical rotation speed and planetary angle is linear which control parameter of critical rotation speeding in the Planetary LabCD Valve Model and compare with James Lee theory, and define γR in SPFS Valve Model to show the relation of the low rotation speed is linear and is fixed where the high rotation speed for utilizes any rotation speed.

本论文考虑离心力与科氏力之影响，且提出行星式碟片阀门模式与单点流体分离阀门模式两模式，其中行星式碟片阀门模式，其临界转速与行星角之大小近於线性变化，可当於控制阀门之临界转速之设计参数，且比较在阀门设计上考虑行星角来控制阀门临界转速与James Lee之阀门临界转速理论可以得知，从吾人所提出行星式碟片阀门模式可以得到与实验结果相同的趋势。

In addition, the leakage coefficient decreases with the decrease of gap width at the same rotational speed.

研究结果表明：用相对流量系数（转动时的流量系数与静止时的流量系数的比值）与速比（周向速度与轴向通流速度的比值）的函数关系表征泄漏量随转速变化的规律时，存在一个临界速比约等于1.0；低于这个临界速比时，转速对泄漏量的影响不明显；高于这个临界速比时，泄漏量随转速的增大而减小，在很高的转速下（6000r/min以上），泄漏量至少减小了5.1%；相同间隙下，泄漏系数随着压比的提高而近似线性增加；相同转速下，随着密封间隙的减小，相对泄漏量逐渐降低。

The complete wind turbine speed control firstly proposed here also improves the tracking effect of wind turbine rotating speed to variable wind speed. Wind turbine rotating speed synchronized power observer compensates the power ripple of wind turbine resulted in inverter dead time. A low pass filter used at the output of MPPT controller smoothes the speed reference, which makes the rotating speed of wind turbine more stable.

本文首次提出的变转速扰动的MPPT控制提高了风车最大功率点追踪的快速性和稳定性，风车完全转速控制提高了风车转速对变动风速的跟踪效果，转速同步风车功率观测法消除了逆变器死区所造成的风车功率波动的影响，带有低通滤波器的MPPT控制器使得风车的转速更加趋于平稳。

Design and realization of engine speed system According to servocontrol technology of D.C and actual equipment, the paper has designed hardware circuit of engine speed system, drive circuit of simulation speed meter and indicator of simulation speed meter.

依据发动机转速系统的数学模型，给出了软件实现框图；依据有关飞行模拟器验证的国家军用标准，利用A/D转换卡采集到的发动机转速系统转速的仿真数据(稳态转速、加速转速和减速转速)，对发动机转速系统的仿真情况进行了验证。4。

When the system starts, the speed outer ring saturats non-functional, the current inner ring plays a major role to regulate the starting current to maintain the maximum so that the speed linear change, to reach a given value; when it operates steadily, the speed negative feedback from the outer ring plays a major role ,to let the speed changes with the given speed voltage , at the same time the current inner ring regulates the armature current of motor adjustment to balance the load current.

该系统起动时，转速外环饱和不起作用，电流内环起主要作用，调节起动电流保持最大值，使转速线性变化，迅速达到给定值；稳态运行时，转速负反馈外环起主要作用，使转速随转速给定电压的变化而变化，电流内环跟随转速外环调节电机的电枢电流以平衡负载电流。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。