测控技术与仪器专业英语 张凤登UNIT-13.Introduction to Control Systems.pptVIP

UNIT 13 Introduction to Control Systems 13.1 Text Open-Loop and Closed-Loop Control 开环控制和闭环控制 13.4 General Knowledge  英文简历  简历（resume 或 curriculum vitae）是个人经历的书面表达形式，是求职、求学者所必备的材料。 一般情况下，简历主要由三个部分组成： 个人信息（personal data）， 教育背景（education）， 工作经历（experience）。 有时也根据不同的需要增加一些项目，如 事业目标（objective或career objective）, 外语技能（foreign language skills）, 获奖情况（honors and awards）, 特长（special skills）等。 * New Words element [elim?nt] n. 元件 manipulate [m?nipjuleit] v. 控制，操纵 ambient [?mbi?nt] a. 周围的，环境的 trace [treis] v. 示[跟，追]踪，显迹 excursion [iksk?:??n] n. 偏差 adversely [?dv?:sli] ad. 相反地，不利地 intervention [,int?ven??n] n. 介入，参入 consistently [k?nsist?ntli] ad. 协调地 Exercises 1. Decide whether it is true or false. T T F, The difference lies in all control systems whether automatic or otherwise. T F, In an open-loop control system in an oven, the output does not affect the input. F, In a manual closed-loop control system, the input is controlled by a human being. F, He cannot accurately adjust it through his experience may decrease the excursion. T F, The function of negative feedback is to measure the output value, compare it with desired value, and then make some changes. F, Automatic closed-loop control performs a task more rapidly than manual closed-loop control. Exercises (continue) 2. Fill in the blanks with the words or expressions below in the correct form. is regarded open-loop operator satisfactory is established closed-loop difference 13.2 Reading and Translation Characteristics of Control Systems 控制系统的特性 New Words criterion [kraiti?ri?n] n. 判据 accuracy [?kjur?si] n. 精度，准确度 response [risp?ns] n. 响应 斜体部分参考译文: ⑴ A dead time or time delay is the difference between the time when input to the system is applied and the time when output is produced. 时间延迟或死区时间是系统输入时的时间和输出产生时的时间的差异。 ⑵ In other words, if we are not careful, we may lose the stability of a system in trying to improve its accuracy, or in trying to improve the stabilit