2021 控制原理(北京交通大学) 最新满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-03-29到2021-07-30

Introduction to Control Systems 第1单元测验

1、 问题:A open-loop control system utilizes an actuating device to control a process (         ).
选项：
A:without using feedback
B:using feedback
C:in engineering design
D:in engineering synthesis
答案: 【without using feedback】

2、 问题:Important modern applications of control systems include which of the following? (          )
选项：
A:Safe automobiles
B:Autonomous robots
C:Automated manufacturing
D:Biomedical engineering
答案: 【Safe automobiles;
Autonomous robots;
Automated manufacturing;
Biomedical engineering】

3、 问题:The following systems belong to the open-loop control are (              ).
选项：
A:washing machine
B:water-level automatic control system
C:traffic control by means of signal operated on a time basis
D:Watt’s flyball governor
答案: 【washing machine;
traffic control by means of signal operated on a time basis】

4、 问题:The basic requirements for automatic control systems include (              ).
选项：
A:stability
B:rapidity
C:accuracy
D:robust
答案: 【stability;
rapidity;
accuracy】

5、 问题:Closed-loop control systems should have which of the following properties: (           )
选项：
A:Good regulation against disturbances
B:Desirable responses to commands
C:Low sensitivity to changes in the plant parameters
D:Stable
答案: 【Good regulation against disturbances;
Desirable responses to commands;
Low sensitivity to changes in the plant parameters;
Stable】

6、 问题:A system is called linear if the principle of superposition applies.
选项：
A:正确
B:错误
答案: 【正确】

7、 问题:In the presence of disturbances, open-loop and closed-loop control system will perform the desired task.
选项：
A:正确
B:错误
答案: 【错误】

8、 问题:A closed-loop control system uses a measurement of the output and feedback of the the signal to compare it with the reference input.
选项：
A:正确
B:错误
答案: 【正确】

Mathematical Modeling of Control Systems 第2单元测验

1、 问题:Consider the system shown in following Figure. If the input is a unit-step input, the final value of the output is (   ).
选项：
A:100
B:0.5
C:50
D:5
答案: 【0.5】

2、 问题:Consider the system shown in following Figure. When all initial conditions are zero, the input is a unit-impulse function, the output c(t) is (                     ).
选项：
A:
B:
C:
D:
答案: 【】

3、 问题:Consider a system represented by the block diagram in following Figure. The closed-loop transfer function C(s)/R(s) is (                      ).
选项：
A:
B:
C:
D:
答案: 【】

4、 问题:Consider the block diagram in the following Figure. The closed-loop transfer functions C(s)/R(s) and C(s)/N(s) are (                             ) respectively.
选项：
A:
B:
C:
D:
答案: 【】

5、 问题:Consider the following differential equation with zero initial conditions  and u(t) is a unit-step function. The poles of this system are (              ). 
选项：
A:-1, -1
B:j1, -j1
C:-1, -2
D:0, -1
答案: 【-1, -1】

6、 问题:Use the initial value theorem to find f(0) when 
选项：
A:3
B:4
C:2
D:1
答案: 【1】

7、 问题:Use the final value theorem to find the final value of f(t) when 
选项：
A:3
B:4
C:2
D:1
答案: 【2】

8、 问题:Find the transfer function Y(s)/U(s) according to the following differential equation with all initial conditions assumed to be zero. 
选项：
A:
B:
C:
D:
答案: 【】

9、 问题:The method to study the nonlinear system is to linearize it. Any nonlinear system should be transformed into a linear system for analysis.
选项：
A:正确
B:错误
答案: 【错误】

10、 问题:The roots of the numerator polynomial of the transfer function are called the zeros of the system.
选项：
A:正确
B:错误
答案: 【正确】

11、 问题:The roots of the characteristic equation are the zeros of the closed-loop system.
选项：
A:正确
B:错误
答案: 【错误】

12、 问题:The transfer function is the ratio of the Laplace transform of the output variable to the Laplace transform of the input variable, with all initial conditions equal to zero.
选项：
A:正确
B:错误
答案: 【正确】

13、 问题:A transfer function may be defined only for a linear, stationary(constant parameter) system.
选项：
A:正确
B:错误
答案: 【正确】

Transient and Steady-State Response Analyses 第3单元测验

1、 问题:Consider a unity negative feedback control system whose open-loop transfer function is The steady-state error to a unit-ramp input is (                   ).
选项：
A:1
B:0.5
C:1/6
D:
答案: 【0.5】

2、 问题:Consider a unity negative feedback control system whose open-loop transfer function isThe present overshoot of the output to a unit-step input is (             ).
选项：
A:9%
B:1%
C:20%
D:no overshoot
答案: 【9%】

3、 问题:Consider a unity negative feedback system with the open-loop transfer functionFind the value of K so that the damping ratio of the system is 0.707. (            )
选项：
A:K=50
B:K=20
C:K=10
D:K=30
答案: 【K=50】

4、 问题:Consider the unity negative feedback control system with following open-loop transfer functionThe design specifications are: (1) peak time  , and (2) the present overshoot %10%. With K as the design parameter, it follows that (              ).
选项：
A:Both specifications can be satisfied.
B:Only the first specification can be satisfied.
C:Only the second specification can be satisfied.
D:Neither specification can be satisfied.
答案: 【Both specifications can be satisfied.】

5、 问题:Using a 2% criterion, the settling time of following first-order system is (           ) for a unit-step input.
选项：
A:1
B:0.8
C:10
D:2
答案: 【0.8】

6、 问题:If the maximum overshoot of a underdamped second-order system is larger than 5%, then its damping ratio may be (                     ).