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电气工程及其自动化 专业英语

苏小林 顾雪平 主编. 电气工程及其自动化 专业英语. 主讲人：张新慧 Tel ： 13561619726 Email ： zhxh626@163.com. Chapter 9 Automation Control System. 2. Text Translation. Exercises. Translation Skills. Section 1 Introduction. New Words And Phrases. Notes. 3. New Words And Phrases.

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电气工程及其自动化 专业英语

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  1. 苏小林 顾雪平 主编 电气工程及其自动化专业英语 主讲人：张新慧 Tel：13561619726Email：zhxh626@163.com

  2. Chapter 9 Automation Control System 2

  3. Text Translation Exercises Translation Skills Section 1 Introduction New Words And Phrases Notes 3

  4. New Words And Phrases automatic control system 自动控制系统 reconfigurable a. 可重构的，可再构的 open-loop control system 开环控制系统 functional block diagram 功能框图 feedback n. 反馈 closed-loop control system 闭环控制系统 single-input single-output(SISO) 单输入单输出 continuous control 连续控制 discontinuous control 断续控制 periodically ad. 周期地 4

  5. New Words And Phrases sample n. 采样，取样，样品，试件；v. 采样 discrete-data 离散数据的 sampled-data 采样数据的 relay feedback control system 继电反馈控制系统 servomechanism n. 伺服机构，伺服系统，随动系统 multiple-input multiple-output (MIMO) 多输入多输出 modern control theory 现代控制理论 trajectory n. 轨迹，轨道 multivariable 多变量 differential equation 微分方程 Laplace transform 拉普拉斯变换 5

  6. New Words And Phrases frequency-response 频率响应 root-locus 根轨迹 time response 时域响应 state variable 状态变量 nth-order n.阶 matrix n. 矩阵 mathematical model 数学模型 eigenstructure n. 特征结构 eigenvalue n. 特征值 eigenvector n. 特征向量 6

  7. Notes 1. A variation of the speed from the desired value, due to a change of mechanical load on the shaft, can in no way cause a change in the value of the applied armature voltage to maintain the desired speed. 由于轴上机械负荷的变化，转速偏离期望值，无法引起所加电枢电压的变化来维持期望转速。 7

  8. Notes 2. The nth-order differential equation describing the system can be converted into a set of n first-order differential equations, expressed in terms of the state variables, than can be written in matrix notation for simpler mathematical manipulation. 描述系统的n阶微分方程可转换成用状态变量表示的n个一阶微分方程组，它可写成矩阵形式便于数学处理。 8

  9. Text Translation Exercises Translation Skills Section 2 Determination of the Overall Transfer Function New Words And Phrases Notes 9

  10. New Words And Phrases block-diagram 框图 transfer function 传递函数 negative feedback 负反馈 error signal 误差信号 operator n. 算子，算符，操作符，控制器 complex parameter 复数参数 frequency parameter 频率参数 time domain 时域 denominator n. 分母 open-loop transfer function 开环传递函数 forward transfer function 前向传递函数 10

  11. Notes 1. The block-diagram of a control system with negative feedback can often be simplified to the form shown in Fig.6-4, where the standard symbols and definitions used in feedback systems are indicated. 具有负反馈的控制系统框图常可简化成图9-4所示形式，图中给出了用于反馈系统中的标准符号和定义。 11

  12. Notes 2. In using the block diagram to represent a linear feedback control system where the transfer functions of the components are known, the letter symbol is capitalized, indicating that it is a transformed quantity; i.e., it is a function of the operator D, the complex parameter s, or the frequency parameter jω. 在使用框图表示各组成部分传递函数已知的线性反馈控制系统中，用大写字母表示变换量，即算子D，或复参数，或频率参数jω的函数。 12

  13. Text Translation Exercises Translation Skills Section 3 Control-System Characteristics New Words And Phrases Notes 13

  14. New Words And Phrases transient a. 暂态的，瞬态的，短暂的 steady-state error 稳态误差 controllability n. 可控性 observability n. 可观性 linear time-invariant system 线性时不变系统 polynomial n.; a. 多项式（的） response n. 响应，答复，应答 driving a. 驱动的 real part 实部 inverse transform 反变换 14

  15. New Words And Phrases polt n. 极，极点 necessary condition 必要条件 sufficient condition 充分条件 imaginary axis 虚轴 s plane s 平面 triangular a. 三角的 conjugate n. 共轭值； a. 共轭的， 共轭根的 quadruplet n. 四件一套，四个一组 numerator n. 分子 15

  16. Notes 1. Routh’s Stability Criterion 劳斯稳定准则 2. Since it is usually not necessary to find the exact solution when the response is unstable, a simple procedure to determine the existence of zeros with positive real parts is needed. 因为响应不稳定通常不必求出确切的解来判断，所以需要一种确定具有正实部零点的简单方法。 3. Hurwitz’s criterion 霍尔维茨准则 16

  17. Text Translation Exercises Translation Skills Section 4 Frequency Response New Words And Phrases Notes 17

  18. New Words And Phrases performance n. 性能 frequency response 频率响应 passband n. 通带，频带 dynamic performance 动态性能 robust a. 强壮的，强健的，健全的，鲁棒的， 坚固的 performance index 性能指标 modern control theory 现代控制理论 synthesis n. 综合，合成 Fourier transform 傅里叶变换，傅氏变换 inverse Fourier transform傅氏反变换 definite integral 定积分 analytical a. 解析的，分析的，分解的 qualitatively ad. 定性地 logarithmic a. 对数的 18

  19. New Words And Phrases rectangular coordinates 直角坐标 logarithmic coordinates 对数坐标 Bode plots 波特图 phase angle 相角 polar coordinates 极坐标 Nyquist plots 奈奎斯特图 dissipation n. 消耗 energy-storage element 储能元件 spurious a. 寄生的，杂散的，乱真的 attenuate v. 衰减，减少，削弱 semilog n. 半对数 logarithm n. 对数 asymptotic a. 渐近的 decibel n. 分贝 radian n. 弧度 octave n. 八度，倍频程（八度） 19

  20. Notes 1. In conventioal control-system analysis there are two basic methods for predicting and adjusting a system’s performance without resorting to the solution of the system’s differential equation. 在传统控制分析中，有两种基本方法不用求解系统微分方程就可预测和调整系统性能。 20

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