自动化英语--概述与语法特点.pptVIP

The rotation of the earth on its own axis causes the change from day to night. (3) 对专业英语主要的要求在于“读”和“译”，在读和译的基础上，对听、说、写进行必要的训练。 Trying: The transfer function of a (sub) system is the ratio of the Laplace transform of its output and input, assuming zero initial condition The motivations for use of feedback were list : Reducing the effect of parameter variations Reducing the effect of disturbance inputs Improving transient response Reducing steady-state errors The first two are the prime reasons why feedback is needed. Review some terms 电阻（元件/抗） 电感(器/抗) 电容(器/抗) 有源元件 无源元件 A 和 B 的代数关系 函数 实数 复数= 实部+虚部 幅值 相位 磁场 电压源 电流源 图形 方框图 表格 受控源 仪表 智能仪表 国际单位 电压降 终端(端点) （欧姆） 定理 性质(属性) 绝缘的 3）In rotating machines, voltages are generated in windings or groups of coils by rotating these windings mechanically through a magnetic field, by mechanically rotating a magnetic field past the winding, or by designing the magnetic circuit so that the reluctance varies with rotation of the rotor (Unit 7) 4）For example, analysis of a DC machine shows that associated with both the rotor and the stator are magnetic flux distributions which are fixed in space and that the torque-producing characteristic of the DC machine stems from the tendency of these flux distribution to align.（unit7） 2) As illustrated in Fig.1, there is a feedback element in the closed-loop system. As in Fig.1, there is a feedback element in the closed-loop system. 就像图1所示的那样，这个闭环系统中有一个反馈元件。 Question： what is the function of feedback? 3) The device includes an instrument transformation and a relay system which has two circuits in it. The device includes an instrument transformation and a relay system with two circuits in it. 这个装置包括一个互感器和一个有两个电路的继电器系统。 Reviews 保险丝 反馈控制 继电器 频(时)域 Key Words and Terms(Unit 2 and 3，4，5) 节点 回路 电流表 顺(逆)时针 周长 行列式 汇合点 (参考)地 芯片 集成电路 硬(软)件 可编程逻辑电