转速

The H∞ robust control problem is resolved with 2-Riccati algorithm, and the H∞ robust controller is used in the rotating speed control of wind turbine, which results in completely wind turbine speed control within frequency band of wind speed variation.

用2-Riccati算法对H∞控制器进行求解，将该控制器用于风车的转速控制中，最终实现在风速波动频率范围内的风车完全转速控制。

A mixed sensitivity H∞ control model is constructed and the band width of wind turbine speed control is designed according to the frequency characteristic of wind speed variation and noise of rotating speed sensor. The sensitivity function is decreased within this frequency band to restrain the wind torque perturbation to wind turbine rotating speed control.

通过构造基于复合灵敏度的H∞鲁棒控制模型，根据风速的波动频率范围和传感器的噪声频率范围设计了风车转速控制的带宽，并在此带宽内降低系统的灵敏度函数，来抑制风力转矩对风车转速控制的干扰。

Plackett-Burman experimental design and the uniform experimental design were used to select the main factors of the ball milling pretreatment of corn stalk. The experimental results were analyzed by data processing software and well-fitted regression equation was established. Effects of ball milling parameters, such as raw material diameter, speed, ratio of raw materials, grinding media and alternating time, on the enzymolysis were analyzed. The optimal parameters of ball milling pretreatment of the corn stalk were as follows: particle size of raw material of 0.5 mm, speed of 340 r/min, the raw material content of 3.4 g, the number of ball of 15 (Ф= 10.0 mm), alternating running time of 5 min.

研究了玉米秸秆水解过程中球磨预处理工艺的优化，采用Plackett- Burman 试验设计和均匀试验设计法，用数据处理软件对试验结果进行分析，筛选出了球磨预处理过程中的主要影响因素，得到了具有较好拟合度的回归方程；通过分析原料粒径，转速，原料填装量，研磨介质，交替时间等球磨条件对酶解效率的影响，得出行星式球磨机粉碎玉米秸秆的最佳工艺参数为：原料粒径0.5 mm，转速340 r/min，原料填装量3.4 g，装球量15个（Ф=10.0 mm），交替运行时间5 min。

The controller controls the velocity of swing motor by the means of meter-in to track the output velocity of rotary stage of the optimal regulator, so that the load sway can be controlled during swing operation.

最后，本文设计了回转液压回路模糊控制器，以换向阀节流调速的方式对液压马达转速进行模糊控制，使起重机回转平台跟踪最优调节器输出的转速，实现对吊重摆振的控制。

The results are: Under sailing condition, the main engine speed should be set at 750rpm when the ship speeds are 4,8,12 and 13kn; The main engine speed should be set at 875r/min when the ship speed is 10kn or while in fishing operation trawl fishing and tuna long line fishing

结果表明，在自由航行工况下船舶航速为4、8、12、13 kn时，主机转速应设定在750 r/min；航速为10 kn时，应设定在875 r/min。拖网及延绳钓作业工况下主机转速应设定在875 r/min。

Most players who want to create greater revolutions on the ball usually overturn the ball with the thumb. But, it must be noted that unusually high revs are not dependent on raw power and speed. For example, Bob Vespi, now retired, generated great revolutions (six revs before rolling past arrows; taped by Don Johnson), yet Vepsi threw one of the slowest deliveries on the tour.

很多球员为了想得到较高的转速，姆指往往都转过了头，还有，快的转速并不纯然来自於手给予球的提拉力道及速度，举个例来说： Don Johnson 曾录下己退休球员 Bob Vespi 的掷球过程，他的球速在巡回赛的职业球员中算是超级慢的，但是他的球在还没到达箭头前却已经转了6圈。

By mechanical analysis of star wheel loading mechanism,the relationship between rotating speed of star wheel and its structural parameters is determined.

通过对星轮装载机构的力学分析，确定星轮转速与星轮结构参数之间的关系，在此基础上，得出了在一定的星轮转速条件下星轮轮齿的中心线。

At present, there are drilling more than 150 plants, with an annual output of various drilling about 1 million units, export over 20 million units, the drilling of speed through a pulley shift to resolve the pagoda, the governor need to stop the process, open the protective Enclosures, manual transmission, and other procedures, the process cumbersome and poor security, and is governing, not transferred to the spindle speed corresponding to the different materials of various aperture drilling at the best speed, the production efficiency is low.

目前，全国有钻床厂150多家，年产各种钻床100万台左右，出口20多万台，这些钻床的变速都是通过一对宝塔皮带轮换档解决的，调速过程需要停车、打开防护罩，手工换档等程序，操作过程繁琐且安全性差，并且是有级调速，不易使主轴转速调到对应于不同材质的各种孔径钻削时的最佳转速，因此生产效率也低。

This paper introduces the test methods of rotate speed when the integral alternator begins to charge and expounds the effect of charging indicator to rotate speed when the alternator begins to charge.

介绍汽车用整体式交流发电机开始充电转速的测试方法，阐述充电指示灯对汽车用整体式交流发电机开始充电转速的影响，并用试验数据说

At same time, designed software and hardware systems collecting and processing flywheel transient speed of the engine, measured flywheel transient speed fluctuation and indicator diagram of engine under different speed and different load, and testified the effectiveness and reliability of the constructed models.

相应地设计了发动机飞轮瞬态转速采集与处理软、硬件系统，并实测了各种工况下发动机飞轮瞬态转速波动及示功图，验证了所建模型的有效性和可靠性。

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