原理

The mainly learnning is low-voltage apparatus、three phase asynchronous motor and electric control wiring of DC Motors、Principle and control of stepper motor and control wiring of typical electric machine、basic theory and basic methods of machine equipment electric control、 basic control circuit of electric control system、analysis of typical electric machine control System、basic principles and methods used of PLC、design and debug of machine tool control system、 design of electrical control gear etc.

主要学习常用低压电器、三相异步电动机和直流电动机的电气控制线路、步进电动机工作原理及控制以及典型机床电气控制线路、机床设备电气控制的基本理论和基本方法、电气控制系统的基本控制电路、典型机床电气控制系统分析、可编程序控制器的基本原理及使用方法、机床控制系统的设计和调试、电气控制装置设计等内容。

Design of the Tension Measuring Mechanism for Wire Electrode;2. Based on electrochemical etching principle,the micrometer scale wire electrode was online fabricated,and the equipment of WEMM was established.

基于电化学原理，讨论了纳秒脉冲电流微细电解线切割加工的机理，建立了微细电解线切割加工数学模型；采用电化学腐蚀原理对微米尺度线电极进行在线制作，建立了微细电解线切割加工试验系统，并进行了微细电解线切割加工试验，切割出带90°直角的微结构，其切缝宽度为30μm。

The inclined wire former is the forming device and key part of inclined wire machine and is also the different part from other paper machines. Study on the inclined wire former is very important in the research on the inclined wire machine.

因为国内还没有较系统的理论，所以本文对斜网成形器的机理和设计研究，是通过大量的造纸原理、造纸机设计理论、机械学原理、流体力学等，并结合作者多年来对纸机设计的经验，来进行斜网机理的探索和斜网成形器的设计要求分析的。

The theory of the reaction wheel is introduced at first,then the invariability theory of disturbing compensation and the math description of feed forward control.are recommenoled feed forward control and dead voltage compensation are added in the model of reaction wheel control.

中文摘要：对星载二维转台中反作用轮的控制技术进行了研究。介绍了反作用轮的作用原理，给出了扰动补偿的不变性原理和前馈控制的数学描述。

In this thesis, we contrast and study a number of new driving-principles and driving-modes of robot, then propose a new working principle and electromagnetic driving-system of the new wall-climbing micro-robot, and analyzed the power of the robot's driving-system.

论文首先对现有机器人的各种新型驱动原理及驱动方式进行了大量的分析对比研究，提出了一种适用于微小步行爬壁机器人的新颖工作原理和电磁直接驱动方式。

First of all, the principle of the traditional throttle pedal is driven by cable-driven throttle to control engine power output, the current most advanced vehicles have been imported electronic throttle, its principle is based on servo motor control section of valve switching point of view, but the two operators who encounter the accelerator pedal stuck failure, life-saving methods should be the same, unless the electronic throttle with automatic reset power design, special or adapted vehicles is another matter.

首先，传统油门的原理是藉由脚踏板拉动钢索驱动节气门，藉以控制引擎动力输出，目前的高级车种大多已导入电子式节气门，其原理是以伺服马达控制节汽门开关角度，但两者如遭遇油门踏板卡死失效，救命的方法应该是一样的，除非电子式节气门有断电自动复位设计，特殊或改装车种则另当别论。

First of all, the principle of the traditional throttle pedal is driven by cable-driven throttle to control engine power output, the current most advanced vehicles have been imported electronic throttle, its principle is based on servo motor control section of valve switching point of view, but the two operators who encounter the accelerator pedal stuck failure, life-saving methods should be the same, unless the electronic throttle with automatic reset power design, special or adapted vehicles is another matter.

首先，傳統油門的原理是藉由腳踏板拉動鋼索驅動節氣門，藉以控制引擎動力輸出，目前的高級車種大多已導入電子式節氣門，其原理是以伺服馬達控制節汽門開關角度，但兩者如遭遇油門踏板卡死失效，救命的方法應該是一樣的，除非電子式節氣門有斷電自動復位設計，特殊或改裝車種則另當別論。

The working principle of the logical control unit in the fuel switch circuit controller is expounded.

介绍汽油/天然气两用燃料汽车的燃料转换控制原理及检修方法，详细阐述转换开关控制器逻辑控制单元的工作原理。

Following are stating the diffraction theory, CCD principle and its relation with the uncertainty .

以下说明广的衍射原理，CCD原理以及测不准关系。

According to the principles of tooth meshing and manufacturing helicoi ds, a mathematics model is constructed to reflect the manufacture process of nut , and the formula of the grinding wheel section is developed. The parameters of the section are obtained through numeral arithmetic; moreover the parameters of the dresser are worked out. Based on these work, the solid model of the ball scr ew nut, grinding wheel and tooth dresser are developed in the Pro/E software, wh at's more, the process of the dressing...

根据螺旋面加工原理、齿形啮合原理及回转面砂轮加工螺母工艺建立了相应的数学模型，并推导出砂轮截形的计算公式；采用数值计算方法求解砂轮截形参数，进一步得到修整器靠模板的参数；在此基础上，利用Pro/E软件对大导程滚珠丝杠螺母、砂轮和砂轮修整器进行了实体建模，并对砂轮的修整过程和螺母的加工过程进行了运动仿真，有效地验证了砂轮截形的计算结果。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。