机械设计制造及其自动化专业英语课后题

第一单元

3. Aliuminum铝 copper 铜nicke镍 titanium 钛structural strength结构强度 deep drawing拉伸加工 4. 定义defition 力torce 轴axle(roller) 非金属nometal 结构structure 载荷load 用途use(application)性质properties(nature)(character)

第二单元

4.hardenability硬化性 machinability可加工性 cold drawn冷拔 steel sheet钢板percent reduction in area断面收缩率endurance limit疲劳极限 rolled-steel shapes 轧制钢板corrosion resistance 抗腐蚀性 rupture断裂

5.低碳钢low-carbon 高强度钢hinger-strengt steel热处理heat treatment屈服强度yield strength弹性模量elastic modulus伸长率percentage elongation韧性toughness 内应力internal stresses

第三单元

4.non-ferrous 非钢的stress-strain curve应力应变曲线 yield point屈服点 percentage elongation伸长率 necking颈缩 sensitivity灵敏性

5.应变硬化strain hardening横截面cross-sectional area断面收缩率reduction in area比例极限limit of proportionality 屈服极限yield limit 延性ductiliy机械性质mechannicalpropertiece用..除..divide…by…

第六单元

3.tangential

notes

肤浅的事情

flexible

manufacturingsystem柔性制造系统machine instruction机器指令 economy of scale规模经济 Hardwireyd logic controller硬固线逻辑控制

transfer-line运输线，流水线 numerically control(NC)数字控制

direct numerical control(DNC)直接数字控制 computer numerical control(CNC)计算机数字控制 4.计算机辅助制造computer-aided manufacturing 数控机床手工、半自动化或全自动化manal semiautomatic or full automation 尽管机械制造业一直在持续发展，但知道20世纪50年代才出现又一个重大发展。Although manufactruring industries continued to evolve,it was not until the 1950sthat the next major development occurred.

第十单元

4.hydraulic motor液压马达 heavy job沉重工作 steam engine蒸汽机

enterprising farmer有进取心的农民 flexibility柔韧性 be employed in作为…成员multitued分散 screw pump螺杆

泵

5.水利系统/液压系统hydraulic system 起始于…date from 史前的prehistoric土建设备earthmoving and construction equipment 依赖于……depened on 被..取代be\\take replace by

第十二单元

4.be concerned with参与、涉及 fluid transport流体输送 energy-conversion devices能量转换装置 a houst of 许多fluid machinery流体机械 auxiliary equipment 辅助系统air-conditionging systems空气调节器 cast into转化 5.流体力学fluid machinery定性理解qualitative understanding

供水系统water supply systrems能量损失energy loss必修课required course定量分析法quantitative analysis techniques流率flow rate

第十六单元

4.open-loop control开环控制 closed-loop c闭环控制 feedback反馈

output variable输出变量 actuating signal执行信号 desired value期待价值

5.框图，原理图block diagram 看不清，盲目的blindfolded 干扰，扰动disturbance

误差检测器error detector 放大器amplifier 反馈控制系统feedback control systems

第十七单元

4.stability稳定性 bandwidth带宽 overall gain总增益 impedance阻抗 sensitivity敏感性 with a broad mind广义来说 turn out to原本是 cause-and-effect relation 因果关系without bound 没有束缚

5.闭合序列closed sequence 线性系统理论linear system theory 静态系统static system 恒定增益constant gains 参考反馈the reference of feedback

电动机绕组（阻）motor winding\\winding resistance

第二十单元

4.relay based system继电器系统 sensor传感器 transducer转换器

optical encoder光学编码器 domain 领域be restricted to局限于

5.机电一体化系统machatronic systems前置处理pre-processing 后置处理post-processing互换性interchangeability 可重复性repeatable 有代表性的representative 单片机a single chip

重点两个句子(第二十单元)

Unfortunately,the usage of the terms sensor and transducer is complicated by the variety of different meanings adopted internationally ,including in some instances an apparent interchangeability.不幸运的是，传感器和转换器术语的使用被国际上五花八门的应用形式复杂化，包括在一些场合下明显的可互换能力。

For the purpose of this book the following definitions are adopted.出于这种目的对于这本书的目的是采用以下定义。

段落及各单元（第十二单元）

1.These fundamentals include a knownledge of the nature of fliuds and the properties used to describe them,the physical laws that govern fluid behavior,the ways in which these laws may be cast into mathematical form,and the various methodolgies(both analytical and experimental)that may be used to solve engineering problems.这些流体力学的基础知识有：流体自然属性方面的知识，用于描述流体性能的知识，支配流体行为的物理定律，把这些定律转化成数学公式与方法，以及用它解决工程问题的方法论，包括实验法和分析法。2.The distinction between a metal and a nonmetal is not always clear cut.金属与非金属的差异一般很难确定3.Engineers would not be particularly interested in such a metal even if it were to be produced,即使绝对纯净的金属可以生产出来，工程师们对它们也并不会特别感兴趣

4.Of the 50 or so metallic elements, only a few are produced and used in large quantities in engineering practice.在50种左右的金属元素里，工程实践中只有少数金属被大量生产和使用。

5.A material tends to change or changes its dimensions when it is loaded, depending upon the magnitude of the load. 材料在加载时，随着载荷大小的变化，尺寸会发生改变

6.When the load is removed it can be seen that the deformation disappear s. For many materials this occurs up to a certain value of the stress called the elastic limit.当卸载时，变形消失。对于许多材料来说，上述情况发生的应力极限值称为弹性极限

7.Logically speaking, once the elastic limit is exceeded, the metal should starts to yield, andfinally break, without any increase in the value of stress. 逻辑上来说，一旦超过弹性极限，金属应该就会屈服直至最后断裂，在应力值上应该没有增加。

8.In more recent years， the role of leadership in hydraulic power application has been taken over largely by some of the larger earthmoving and construction equipment manufacturers the total Power involved is often greater than that required in even the largest aircraft systems．近年来，一些规模较大的生产土建设备的厂商在液压动力应用方面一直站着主导地位。

9. A very significant feature of hydraulic power is its extreme power density． 一个非常重要的特征是它的极端水力发电功率密度。

10.Fluid mechanics is the branch of engineering science that is concerned with forces and energies generated by fluids at fest and in motion流体力学是一门在静止和运动时产生力和能量的工程学科。

11.Fluid transport is movement of a fluid from one place to another so that the fluid may be used or processed流体输送时指为利用和处理流体而使之从一个地方到另一个地方的运动过程。

12.In general,the sensitivity of the system gain of a feedback system to parameter variations depends on where the parameter is located通常，反馈系统的增益对于参数变化的灵敏度取决于参数所在的位置

13.The quantity GH may itself include a minus sign,so the general effect of feedback is that it may increase or decrease the gain. GH量本身也可能包含一个负号，所以反馈的总效应可以是增加增益，也可以是减小增益。。

14with the advent of the industrial revolution,instrumentation and measurement science began to be applied to manufacturing. 随着工业革命的到来，仪表和测量科学被逐步用于制造业

15.The growth in microlectronics and computing technologies power has resulted in parallel growth in the demand for information about system conditions. 微电子技术和计算技术的进步使得对系统条件信息的需求相应增加。

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