动电

Based on a data collecting system of moving and static test-bed about helicopter airscrew,the paper designed principal axis low speed control system ,namely designed electric control system, speed measuring system of it and researched a debugging shceme about low speed control system.

本文以"直升机旋翼动平衡试验台数据采集工程"为背景，设计了"直升机旋翼动平衡试验台数据采集系统"工程中的主轴低速控制系统，即对低速控制系统中的电控系统和测速系统进行了设计，并结合实际工程给出了系统的调试方案和最后的实验结果。

When a rotating voltage vector is injected to the motor at standstill, there is a microinching when the voltage phase is line to the direct axis of the motor. Then the current will decrease due to the back electromotive force. The initial mover position is identified by this change.

电压相位和电机直轴重合时，产生的电磁推力超过负载阻力，电机有一微动，由于反电势的作用电流就会降低，通过检测电流矢量的变化来估计动子的初始位置。

Guiyang, July 20 (Xinhua Yang Mei-Miao) 2008 Asian Youth Championship and China's animation before the cartoon art festival in Guiyang City, Guizhou Province, the experts gathered together around the ideas, investment, market, and other topics, Hot debate the development of China's cartoon industry.

新华网贵阳7月20日电2008亚洲青年动漫大赛暨中国卡通艺术节日前在贵州省贵阳市举行，专家们共聚一堂，围绕创意、投资、市场等话题，热议论中国动漫产业的发展。

By using the"energy equivalent method",thepiezoelectric structure damping is equivalent to a viscosity damping,according to which the quantitative relationship between the response time ofan one-dimensional piezoelectric actuation system and the mechanical qualityfactor of its piezoelectric material.The inexactness of the previouscorresponding relationship obtained by Taylor is analyzed.

用能量等效法将压电结构阻尼等效为粘性阻尼，建立起一维压电致动系统的响应时间与压电材料机械品质因子之间的定量关系，分析了以前由Taylor所获得的定量关系的不严格性。

Damsite selection of Yilan Navigation Hydro- junction on Songhuajiang River;2. Study on the general layout scheme for reinforcement and extension project of Guoyang junction sluice;3. The river reach of Dadingzishan Navigation-power junction engineering is characterized by wide grade II terrace,large distance between the two dikes,thick covering of river bed,and strong movability and permeability of riverbed,and the overall layout is the essence of construction of low-head navigation-power junction on the reach.

松花江大顶子山航电枢纽工程河段具有Ⅱ级台地宽、两岸堤距大、河床覆盖层厚、河床质可动性及渗透性强等特点，该河段兴建低水头航电枢纽工程其总体布置是关键，利用正态物理模型(11∶00)及遥控自航船模等研究手段，对大顶子山航电枢纽工程预可、工可、初步设计及施工图设计等阶段枢纽总体布置进行了多方案比选，提出枢纽主要建筑物布置：自右岸依次为船闸、10孔泄水闸、电站、28孔泄水闸及土坝。

In this system, EOG signals produced by the user's eye saccade movements are recorded through electrodes placing on the face, and then the signals are reconstructed and analyzed in real time. By constantly monitoring the electrooculogram signal of the user, the eye mouse is able to recognize several intentional eye motions and in turn, control the cursor on the computer screen.

在此系统中，眼动波讯号是使用者眼睛移动、注视所产生的，而眼动波是透过贴附在脸上的电极所量测到，电极量测到的讯号再即时的经过讯号处理与分析，藉由持续性的的量测眼动波讯号，眼滑鼠系统能够辨识多种眼睛刻意移动的讯号，透过此讯号能够控制电脑上的游标来做动作。

Aiming at the deficiency of the conventional electro-hydraulic proportional valves performance,such as response time and response speed,an ultra-high-speed electro-hydraulic proportional valve is proposed,and the structure of an electro-mechanical converter is put forward using eight pieces tegular Halbach magnet array with gaps.

针对常规电液比例阀在响应时间和响应速度等性能上的不足，设计了一种超高速电液比例阀，并且提出了8片瓦型有气隙Halbach磁化阵列型动圈式电-机械转换器。

Distribution of Direct Drive Type Solenoid Valve The distribution of direct-action solenoid valve works: it is a direct-acting and pilot-style combination of theory, when the entrances and exits when there is no differential pressure, electricity, the electromagnetic force directly to the pilot valve and main valve off small pieces turn up raised, the valve opens.

分布直动式电磁阀分布直动式电磁阀的工作原理：它是一种直动和先导式相结合的原理，当入口与出口没有压差时，通电后，电磁力直接把先导小阀和主阀关闭件依次向上提起，阀门打开。

Distribution of Direct Drive Type Solenoid Valve The distribution of direct-action solenoid valve works: it is a direct-acting and pilot-style combination of theory, when the entrances and exits when there is no differential pressure,气动阀, electricity, the electromagnetic force directly to the pilot valve and main valve off small pieces turn up raised, the valve opens.

分布直动式电磁阀分布直动式电磁阀的工作原理：它是一种直动和先导式相结合的原理，当入口与出口没有压差时，通电后，电磁力直接把先导小阀和主阀关闭件依次向上提起，排气阀，阀门打开。

An analysis of synopsis is given for the operating principle and structure features of UAV,as compared with the traditional hydraulic brake system.The electric actuator which is the key technique of the system is specially analysed and studied in detail,and the design and calculating method is presented.

与传统的液压刹车系统进行对比，简要分析了全电刹车系统的刹车原理和结构特点；特别针对全电刹车系统的关键技术即电作动机构进行深入的分析和研究，给出了相应的设计计算方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。