第一章 单元测试

1、单选题：
The transfer function of a certain integral link is: . If the input of this integral link is a 0-5V step signal, then the ideal step response expression of this integral link is （ ）.
选项：
A:1.25t
B:3.125t
C:6.25t
D:12.5t
答案: 【6.25t】

2、判断题：
The ideal step response of the differential link is different from the practical step response obtained by the operational amplifier circuit. （ ）
选项：
A:错
B:对
答案: 【对】

3、单选题：
If the input signal of a certain link is a step signal of 0-5V, and the ideal step output curve is shown in the figure below, then this link is （ ）.

选项：
A:Proportional-differentiation link
B:Differential link
C:Proportional-integral link
D:Integral link
答案: 【Proportional-differentiation link】

4、单选题：
From the step output effect of the PID link, the step output order of P, I, and D is （ ）.
选项：
A:I→P→D
B:D→I→P
C:P→I→D
D:P→D→I
答案: 【P→D→I】

5、单选题：
The startup operation sequence of ACES-II automatic control comprehensive experimental system equipment is （ ）
选项：
A:Turn on the computer → Turn on the DC power → Turn on the AC power
B:Turn on DC power → Turn on computer → Turn on AC power
C:Turn on AC power → Turn on computer → Turn on DC power
D:Turn on the computer → Turn on AC power → Turn on DC power
答案: 【Turn on AC power → Turn on computer → Turn on DC power】

第二章 单元测试

1、多选题：
In the second-order system shown as the analog circuit below, amplifier A3 can be regarded as?（ ）

选项：
A:Proportional link
B:Adder
C:Inertial link
D:Integral link
答案: 【Proportional link;
Adder】

2、单选题：
In the second-order under-damped system, if the value of the undamped natural frequency ωn remains unchanged, how does the dynamic characteristics of the system change when the damping ratio ξ is reduced? （ ）
选项：
A:Reduce overshoot and increase settling time
B:Increase overshoot and the settling time
C:Reduce overshoot and settling time
D:Increase overshoot and reduce settling time
答案: 【Increase overshoot and the settling time】

3、单选题：
In the second-order under-damped system, if the value of the damping ratio ξ remains unchanged, how does the dynamic characteristics of the system change when the undamped natural frequency ωn is reduced? （ ）
选项：
A:Increase overshoot and the settling time
B:The overshoot remains unchanged, while the settling time decreases
C:Reduce overshoot and increase settling time
D:The overshoot remains unchanged, while the settling time increases
答案: 【The overshoot remains unchanged, while the settling time increases】

4、单选题：
In the second-order system shown as the analog circuit below, what is the expression for the open-loop gain of the system?（ ）

选项：
A:
B:
C:
D:
答案: 【】

5、单选题：
The analog circuit of a second-order closed-loop system is shown in the following diagram. If this closed-loop system is a ramp signal is inputted with a ramp signal , what is the theoretical value of the steady-state error of the system?（ ）

选项：
A:6.25
B:0.32
C:0.64
D:3.125
答案: 【0.64】