驱动

Based on the compressibility, viscosity resistance and the working house system's deformation etc, flow equations of distribution spool, hydraulic tube and fluid cylinder for 300 MN die forging hydraulic press were established, and dynamics equations of moving beam and upper beam were established based on analysis. The dynamics mechanical-hydraulic coupling model of driving system was established.

摘 要：考虑流体的可压缩性、粘性阻力及工作框架系统变形等因素，采用解析法建立300 MN模锻水压机动梁驱动系统分配阀口、液压管道、液压缸的流量方程以及动梁和上横梁的动力学方程，得到驱动系统的动态机液耦合模型。

At last, the software for upper machine and lower machine is introduced.Chapter 3, on the basis of the experiment on the nano feeding control platform, the mathematic modal of drive parts is established considering that the nano feeding under large feeding force has some open air temperature random disturbance phenomenon which influences the feed precision.

第三章，首先对建立数学模型的分步拟合方法进行了介绍，接着，在实验的基础上，通过拟合的方法得出纳米级热驱动部件输入功率与输出位移的数学传递函数以及外界温度干扰与输出位移的数学传递函数，最后建立了干扰情况下的纳米级热驱动部件数学模型。

The varible of the response system is substituted with the variable of the drive system and the forcing synchronous components equal to zero so that the response system synchronizes with the drive system.

将驱动系统的变量替代响应系统的变量，使Lyapunov函数导数的强迫项变为0，响应系统与驱动系统达到同步。

Placing the entire graphics driver in user mode eliminated the need to write a kernel driver, but marginalized overall system performance by forcing the CPU to busy-wait for the graphics engine.

把所有的图形驱动放在用户空间排除了写一个内核驱动的必要性，但是这也使CPU要在图形引擎上忙等，影响了系统的整体性能。

And the dynamic equation for a DCC five-bar linkage is given out as an example. thirdly, with considering the effect of elasticity of rubber tube and friction on artificial muscle, a new contracting model for it is establishd.

基于新建力学模型，推导了人工肌肉驱动关节的驱动模型，研究了关节上存在的固有刚度和伺服刚度，提出了关节的双参数可控性。

Steering gear may be driven by either of the two hydraulic pumps, the other for spare. Pump unit to be electric driven variable type or fixed stroke type (according to standard of steering gear maker).

舵机可由2台液压泵中的任一台驱动，另一台备用，泵装置为电动驱动的变量液压泵或定行程液压泵。

Based on analyzing performance of gear machining system and mechanism of machining error, the description method of machining error was presented for gear machine. According to the performance-driven design concept and generalized multi-body certainty theory, driven by gear machining error, machining error fine model and system integrated design method of CNC gear shaper was studied.

本文在分析齿轮加工机床的系统性能和加工误差产生机理的基础上，提出了加工误差描述方法；以&性能驱动设计&为基本理念，以齿轮加工误差为驱动，以广义确定性多体系统为理论基础，研究了数控插齿机加工误差精细分析和系统集成设计方法。

Especially in the field of elevator, numerical control machine tool etc., the traditional decelerater-electrical motor drive mode are now gradually replaced by the integrated drive system that is built up power electronic-electrical motor-mechanical load with center of micro-electronic info processor. The main study objects of this item are the gearless elevater traction drive system.

尤其在电梯和数控机床等低速大扭矩驱动领域中，以电子信息处理技术为核心与电力电子电源-电动机-机械负载组成融为一体的闭环无级变速系统，正在逐步取代传统的减速机-电动机驱动模式。

Three-axis hydraulic simulator is a complex multiple-input-multiple-out nonlinear system. Its inner and outer gimbals are directly driven by a set of hydraulic servo system respectively, and its middle gimbal is directly driven by dual hydraulic motors servo system. The performance of hydraulic control system is very important to the simulator's.

液压三轴仿真转台是一个多输入多输出的复杂非线性系统，其内框和外框各由一套电液位置伺服系统直接驱动，中框由双液压马达伺服系统直接同步驱动，相应的液压控制系统的性能对转台的性能有着十分重要的影响。

Until 1935 the lathe was intended to be driven by round "gut" leather bands, a distinct disadvantage when heavier cuts were needed; Drummond, for example, had abandoned the round belt in 1921 and changed to an inch-wide flat, an option denied to Exeter Engineering by the compact nature of their drive system.

直到1935年的车床是打算轮驱动的&肠&皮革带，一个明显的劣势时较重，需要削减；德拉蒙德，例如，已经放弃了轮带，在1921年改为1厘米宽的平面，一个选项否认到埃克塞特工程的性质，其紧凑的驱动系统。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。