TRẮC NGHIỆM HỆ THỐNG ĐIỀU KHIỂN TỰ ĐỘNG

15 CÂU HỎI TRẮC NGHIỆM CÓ THỂ CÓ TRONG
ĐỀ THI 2017
VÀ NỘI DUNG ÔN THI
A. CÂU HỎI TRẮC NGHIỆM
1. ABS controls
A. The wheel slip ratios in a range from 10% to 30 %
B. The wheel slip ratios at maximum.
C. The wheel slip ratios at minimum.
D. The wheel slip ratios in a range from 70% to 90%
2. Which is the correct statement for Cruise Control System?
A. CCS maintains the vehicle velocity by controlling the throttle.
B. CCS equivalently distributes the braking force for each wheel.
C. CCS maintains the vehicle velocity by controlling braking pressure.
D. CCS controls the vehicle velocity based on roads profiles.
3. Choose the correct response for this system

Answer :


4. An ABS diagram as follow:


In pressure reducing mode: Port A is closed, Port B is opened, the 5A current is
provided for 3-position valves , pump voltage is 12V, valve 1 is opened, valve 2 is
opened, valve 3 is opened
5. Given the PID with: KP=0.5; KI=0.3; KD=1. The equivalent transfer
function of PID controller is
A. (s^2+0.5*s+0.3)/s
B. (0.5*s^2+s+0.3)/s
C. (0.3*s^2+0.5*s+1)
D. (s^2+0.3*s+0.5)/s

6. Given 3 membership functions as follows.

A. The degree of Opened membership function is 0.
B. The degree of Opened membership function is 1.
C. The degree of Middle membership function is 0.4.
D. The degree of Closed membership function is 1.
7. Obtain the transfer function of system


A.
B.
C
D
8. Which is the correct statement for general state-space equation
representation of system

A. A is a system matrix, B is a input matrix.
B. B is a system matrix, A is a input matric.
C. A and B are the input matrices.
D. A and B are the system matrices.

9. The transfer function of a system depends on
A. System order and system parameters.
B. Input and output signals of system.


C. Only input signals.
D. Only system parameters.
10. Given Matlab code as follows. Obtain the transfer function G(s).
num = [1 2];

den = conv ([1 2],[1 3]);
G = tf (num,den)
A. G(s) = (s+2)/(s^2+5*s+6)
B. G(s) = (s^2+5*s+6)/(s+2)
C. G(s) = 3*s/(3*s+4)
D. G(s) = (3*s+4)/3*s
11. Given the general closed loop feedback control diagram. Which is the
correct statement?

A. A is the controller, B is the actuator, C is the plant, D is the sensor.
B. A is the sensor, B is the actuator, C is the plant, D is the controller.
C. A is the actuator, B is the sensor, C is the plant, D is the controller.
D. A is the controller, B is the plant, C is the sensor, D is the actuator.
12. What is the role of clutch in automatic transmission?


A. Connecting 2 rotating components.
B. Connecting rotating components to AT case.
C. Preventing the reverse direction of rotating components.
D. Disconnecting the rotation when vehicle drivers is shifting gear.
13. Given the CCS control diagram as follow. What is u(t)?

A. Desired vehicle speed.
B. Desired steering angle.
C. Current vehicle speed.
D. Current steering angle.
14. The Laplace Transform of unit impulse is 1

A. 1
B. 1/s

C. s
D. 1/s^2
15. What is ECT?
A. Electronic Control Transmission.


B. Electric Control Transaxle
C. Electric Control Unit.
D. Electronic Control Transaxle

B. NỘI DUNG THI
1. Một số hệ thống điều khiển động cơ trên ô tô. (25%)
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ABS/TCS
ESC
CCS
A/T or ECT

(HỌC THUỘC CẤU TẠO VÀ NGUYÊN LÝ HOẠT ĐỘNG)
2. Control theory. (60%)
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Overview of control system.
- Open-loop
- Closed-loop
- System component
Modeling
- Transfer Function
- State Space Equation
System stability
System Analysis
Block diagram
Control design
- On/of control
- P Control (proportional control)
- PI and PID (optional)

(LẬP TRÌNH TOÀN BỘ CÁC KIẾN THỨC TRÊN MATLAB)
3. Fuzzy Control (15%)