Site Logo Home
 
rOm
Quest
Glossary
 
Random
Page
Search
Site
Lush
Sim
Class
Subject
Images
 
Help
FAQ
Sign
Up
Log
In
AS Level     >Control Systems<     Feedback    

Control Systems


Site for Eduqas/WJEC - Go to the AQA site.

  AS Level    Control Systems  0 of 22    Question 233    Closed Loop Control 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set1 of 22    Question 801    Feedback 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set2 of 22    Question 802    Feedback 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set3 of 22    Question 803    Feedback 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set4 of 22    Question 720    Feedback 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set5 of 22    Question 787    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set6 of 22    Question 788    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set7 of 22    Question 804    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set8 of 22    Question 805    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set9 of 22    Question 806    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set10 of 22    Question 807    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set11 of 22    Question 808    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set12 of 22    Question 809    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set13 of 22    Question 231    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set14 of 22    Question 232    Open and Closed Loop 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set15 of 22    Question 1011    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set16 of 22    Question 1012    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set17 of 22    Question 1013    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set18 of 22    Question 1014    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set19 of 22    Question 1015    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set20 of 22    Question 1019    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set21 of 22    Question 1020    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set22 of 22    Question 1021    Subsystems 
Score 0/0 
Not attempted  
Last Answer  
Deadline not set  Questions 0 to 22   -->  View All  

Complex electronic systems can be broken down into simpler sub-systems. This makes it easier to understand, design and test the circuits.

Systems typically have ...

  1. INPUT/S - Sensing
    1. Light,
    2. Temperature
    3. Magnetic field
    4. Pressure
    5. Moisture
    6. Sound
    7. Movement or Rotation
  2. PROCESS/ES
    1. Comparator
    2. Logic gates
    3. Latch
    4. Time delay
    5. A to D Converter
    6. D to A Converter
    7. Microcontroller
  3. OUTPUT/S
    1. Lamp or LED
    2. Warning buzzer
    3. Solenoid
    4. Actuator, Motor or Servo
    5. Loudspeaker
    6. Most output transducers need a DRIVER.

Sub-systems and System Diagrams (Labelled boxes joined with arrows)

System diagrams are used to describe systems and sub-systems.

Dividing a system into sub-systems is a good idea because a whole system can be hard to understand.
Each sub-system can be quite simple.
Complex systems are only possible because different teams of designers and testers are responsible for each sub-system.
Many sub-systems can be purchased pre-built and tested.

Example: Turn on a lamp when it gets dark.

To achieve this you'd need ...

Input Process Output

A System Diagram

Circuit Diagram (Don't confuse circuit and system diagrams)

Sub System Circuit Diagram


A More Complex Example

  1. Decoupling Capacitor
  2. Voltage Divider - a fixed reference voltage
  3. Voltage Divider - a light dependent voltage that decreases as it gets dark
  4. Op Amp Comparator. In daylight, the output is LOW. At night, the output is HIGH.
  5. 555 Astable. At night, the reset pin is HIGH and the astable oscillates causing the lamp to flash. In daylight, reset is LOW and the lamp is OFF.
  6. Transistor Switch Transducer Driver. The transducer is the lamp.

A More Complex System with Many Sub-Systems

Subject Name     Level     Topic Name     Question Heading     First Name Last Name Class ID     User ID    

fff
Home
<<<
ppw
Pg Up
<<
ppp
Up
<
|||

>|<
nnn
Down
>
nnw
Pg Down
>>
lll
End
>>>

Close
Escape
X

Q: qNum of last_q     Q ID: Question ID         Score: num correct/num attempts         Date Done    

 

Submit
Enter

 

Question Text

image url

 


Help Link

Add     Delete     Clone     Edit     Hardness

Help Text
Debug


 

 

 

Contact, Copyright, Cookies and Legalities: C Neil Bauers - reviseOmatic V4 - © 2016/17

Hosted at linode.com - London