自动化专业英语复习点
- 格式:doc
- 大小:98.00 KB
- 文档页数:11
考试有风险(挂科),复习需谨慎!→_→ ←_← 以下资料(不保证全部正确),如有错漏,请自行更改!
题型:1、单词(30%) 英译中 6 中译英 9
2、课本句子(30%)
句子 6 段落 7 摘要 4
3、课外(40%)
一、 单词:
1、 根轨迹P85 the root locus
2、 方块图计算P73 block diagram algebra
3、 调节时间P80 settling time
4、 现场总线P211 field bus
5、 DSP P165 digital signal processor 数字信号处理器
digital signal processing 数字信号处理
6、 几种表压P183 psig:pounds per sequare inch gauge 表压【磅/每平方英寸】
psia:pounds per sequare inch absolute 绝对压强【磅/每平方英寸】 pounds per sequare inch of area 磅/每平方英寸面积
psi :pounds per sequare inch 磅/每平方英寸面积
psid:pounds per sequare inch gauge 压差【磅/每平方英寸】
7、 DCS P207 discrete control system 离散控制系统
8、 家用电器P263单词 appliances 电器用具、家用电器
9、 P7 NOTES 2 photovoltial 光电的、光伏的 power factor 功率因数
10、运算放大器P9 the operational amplifier
11、出射角、入射角P89 departure angle 出射角 arrival angle 入射角
12、主存储器、辅助存储器P139 primary memory主存储器
secondary memory 辅助存储器
13、变送器P181 transmitter 变送器(热敏电阻)
14、局域网P207 LAN:local area networks 局域网
15、Unit 2 PART A 标题P259 smart grid standard 智能电网标准
16、触发器P19 flip-flop
17、相位超前、相位滞后P29 phase-lead 相位超前 phase-lag 相位滞后
18、P187 NOTES gpm:gallons per minute 每分钟加仑数
19、物联网P279 Internet of Things
20、云计算P264 标题 Cloud computing
21、P206 标题、工厂自动化 factory automation
22、嵌入式系统P174 embedded system
23、布尔代数P19 Boolean algebra
24、偏微分方程P69 partial differential equation
25、常对数P99 common logarithm
26、稳态误差P80 标题 the steady-state errors
27、P4 PART B标题 三相电路 three-phase circuits
二、课本翻译(英译中或中译英)
1、P2长句子
P2 课文:A summary of Eqs. (1-1A-1) (1-1A-2) and (1-1A-4) for the three forms of passive circuit element is given in Fig. 1-1A-1.Note that conventional current flow is used;hence
the current in each element is shown in the direction of deceasing voltage.
Active electric devices involve the conversion of energy to electrical form. For example, the
electric energy in a battery is derived from its stored chemical energy. The electric energy of a
generator is a result of chemical energy of the rotating armature.(电枢,衔铁,加固)
Active electrical elements occur in two basic forms: voltage sources and current sources. In
their ideal form, voltage sources generate a constant voltage independence of the current drawn
from the source. The aforementioned(上述的,前面提到的) battery and generator are regarded
as voltage sources since their voltage is essentially constant with load. On the other hand, current
sources produce a current whose magnitude is independent of the load connected to the source.
Although current sources are not as familiar in practice, the concept dose find wide use in
representing(代表,表示,阐明) an amplifying (放大)device, such as the transistor, by means
of an equivalent electrical circuit. Symbolic(符号的,记号的) representations of voltage and
current sources are shown in Fig.1-1A-2.
A common method of analyzing an electrical network is mesh(网孔) or loop analysis. The
fundamental law that is applied in this method is Kirchhoff’s fist law(基尔霍夫第一定律),
which states that the algebraic sum of the voltages around a closed loop is 0, or, in any closed
loop, the sum of the voltage rises must equal the sum of the voltage drops. Mesh analysis
consists of assuming that currents—termed loop currents—flow in each loop of a network,
algebraically summing the voltage drops(电压降) around each loop, and setting each sun equal
to 0.
Consider the circuit shown in Fig. 1-1A-3a which consists of an inductor and resistor
connected in series(串联) to a voltage source e. Assuming a loop current I, the voltage drops
summed around the loop are -e+uR+uL=0 (1-1A-5)
译:归纳式(1-1A-1)、(1-1A-2) 和 (1-1A- 4)描述的三种无源电路元件如图1-1A-1所示。注意,图中电流的参考方向为惯用的参考方向,因此流过 每一个元件的电流与电压降的方向一致。
有源电气元件涉及将其它能量转换为电能,例如,电池中 的电能来自其储存的化学能,发电机的电能是旋转电枢机械能 转换的结果。
有源电气元件存在两种基本形式:电压源和电流源。其理 想状态为:电压源两端的电压恒定,与从电压源中流出的电流 无关。因为负载变化时电压基本恒定,所以上述电池和发电机 被认为是电压源。另一方面,电流源产生电流,电流的大小与 电源连接的负载无关。虽然电流源在实际中不常见,但其概念 的确在表示借助于等值电路的放大器件,比如晶体管中具有广 泛应用。电压源和电流源的符号表示如图1-1A-2所示。
分析电网络的一般方法是网孔分析法或回路分析法。应用 于此方法的基本定律是基尔霍夫第一定律,基尔霍夫第一定律 指出:一个闭合回路中的电压代数和为0,换句话说,任一闭 合回路中的电压升等于电压降。网孔分析指的是:假设有一个电流——即所谓的回路电流— —流过电路中的每一个回 路,求每一个回路电压降的代数和,并令其为零。
考虑图1-1A-3a 所示的电路, 其由串联到电压源上的电感和电阻组成,假设回路电流i ,那么 回路总的电压降为:-e+uR+uL=0 (1-1A-5)
2、P7长句子
[1] Viewed in this light, it will be found that the analysis of three-phase circuits is little more
difficult than that of single-phase circuits. 译:这样看来,三相电路的分析比单相电路的分析难不了多少。 过去分词短语作状语,用以表示时间、原因、让步、方式或陪衬情况。必须注意过去分词表示的被动行为对象是句中主语。
*[2] At unity power factor,the power in a single-phase circuit is zero twice each
cycle. 译:在功率因数为1时,单相电路里的功率值每个周波有两次为零。
at 用于表示速度、温度、价格、成本和比率。
[3] It should be noted that if the polarity of point A with respect to N ( ) is
assumed for the positive half-cycle, then when used in the same phasor diagram should
be drawn opposite to, or 180 out of phase with, .译:应该注意,如果把A点相对于N的极性( )定为正半周,那么 在用于同一相量图中时就应该画得同 相反,即相位差为180。
should 用于表示建议、要求、决定、命令等意义的主从复合句内,这时从句谓语一般是“should+动词原形”。
3、P82第一、二段
第一段:Actual system are also subjected to undesirable inputs, such as noise in command
inputs and disturbances arising from changes in the plant parameters or changes in the
environment in which the plant is operating. Noise inputs that enter the system with the
command input require filtering techniques to remove or suppress them without affecting the
command input itself. We shall limit our discussion to disturbance inputs which enter the system
at the plant rather than at the controller,as indicated in the generalized block diagram of
Fig.2-2B-2a.In Fig.2-2B-2b the diagram is redrawn with the disturbance d as the principal
input.Since the system is linear,the principle of superposition holds,and we can assume r equal to
zero.The disturbance input transfer function for an unity feedback system(H(s)=1)can be written
as )()(1)()()()(1)()()()(pcp1pcpddsGsGsGsHsGsGsGsDsCsGH
译:实际系统也受非期望输入的影响,比如:控制命令中的噪声,设备运行时由于设备参数变化和运行环境变化引起的扰动。夹杂在控制命令中的噪声输入,需要用滤波技术除去或抑制,使之不影响控制输入本身。我们仅讨论在设备处进入系统的扰动,而不是从控制器中进入的,如图2-2B-2a。以干扰d作为主要输入的重画图如图2-2B-2b。由于系统是线性的,叠加定理成立,我们可以假定r为零。单位反馈系统的扰动传递函数可写作下式:
)()(1)()()()(1)()()()(pcp1pcpddsGsGsGsHsGsGsGsDsCsGH
第二段:When this transfer function is compared with the usual input-out transfer function
with d=0,we see that characteristic equations are identical,as is to be expected,but that
numerator functions are differert.A disturbance input,therefore,will not affect the stability of the
system but may change the shape of the transient response and introduce steady-errors that
must be considered in determining the overall accuracy of the system.
译:将这个传递函数和d=0的普通输入输出传递函数相比较,如同期望的,其特征方程是一样的,但是分子函数是不同的。因此可知扰动输入不会影响系统的稳定性,但是可以改变暂态响应的形状,并且它要引入到在测量整个系统精度所必须考虑的稳态误差
附第三段:It is often difficult to minimize both components of the error simultaneously.
Obviously, it is necessary to have some knowledge as to the nature of probable disturbance
inputs. Both error terms of Eq.(2-2B-7) can be set equal to zero by introducing an integrator into
the controller. This additional integrator increases the type of the system ( from 1 to 2, for