课后习题1

习 题

1-1 自动控制系统通常由哪些环节组成？它们在控制过程中担负什么功能?

1-2 试比较开环控制系统和闭环控制系统的优缺点。

1-3 一晶体稳压电源如题1-3图所示。试画出其原理方框图，并说明被控量、给定值、干扰量是什么，哪些元件起着测量、放大和执行作用。

1-4 题1-4图中给出了一个反坦克导弹控制系统工作原理示意图。试分析其工作原理并画出系统原理方框图。

1-5 题1-5图为发电机电压调节系统，该系统通过测量电枢回路电流i 产生附加的激励电压b U 来调节输出电压c U 。试分析在电枢转速 和给定激励电压g U 恒定不变而负载变化的情况下系统的工作原理并画出原理方框图。

1-6 某住宅楼水池水位控制系统如题1- 6图所示。试简述系统各组成元件的作用及系统的工作原理，并画出系统的原理方框图。

1-7 题1-7图是仓库大门自动控制系统原理示意图。试说明系统自动控制大门开闭的工作原理并画出系统原理方框图。

题1-3图 稳压电源原理图

题1-4图 反坦克导弹控制系统工作原理示意图

题1-5图 发电机电压调节系统原理图

1-8 电冰箱制冷系统工作原理如题1-8图所示。试简述系统的工作原理，指出系统的被控对象、被控量和给定量，画出系统原理方框图。

1-9 函数记录仪是一种自动记录电压信号的仪器，其原理如题1-9图所示。试分析系统的工作原理并画出系统的原理方框图。

题1-8图 电冰箱制冷系统工作原理图

题1-7图 仓库大门自动开闭控制系统原理图

题1-9图 函数记录仪原理图

1-10 题1-10图所示为发电机-电动机组转速负反馈控制系统。图中，g U 为输入量，转速n 为输出量，s K 表示功率放大器的放大倍数，G 为发电机，M 为电动机，TG 为测速发电机。若不考虑扰动量，试画出系统的原理方框图。

1-11 题1-11图(a)和(b)均为自动调压系统。设空载时，图(a)与(b)发电机端电压均为110V 。试问带上负载后，图(a)与(b)哪个系统能保持110V 电压不变?哪个系统的电压会稍低于110V? 为什么?

1-12 题1-12图所示为带钢连轧机的轧辊转速自动控制系统原理图。试分析系统的工作原理并绘制其原理方框图。

题1-10图 发电机-电动机组转速负反馈控制系统原理图

题1-11图 自动调压系统

题1-12图 连轧机的轧辊转速自动控制系统原理图 f u

+ +

a u

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