Difference between open loop and closed loop control system
Difference between open loop and closed loop control system :
Sr No.
|
Open loop control system
|
Closed loop control system
|
1 |
Feedback doesn’t exists
|
Feedback exists
|
2 |
Output measurement is not necessary
|
Output measurement is necessary
|
3 |
Any change in output has no effect on input
|
Changes in output affects the input
|
4 |
Error detector is absent
|
Error detector is present
|
5 |
Inaccurate and unreliable
|
Highly accurate and reliable
|
6 |
Highly sensitive to disturbance
|
Less sensitive to disturbance
|
7 |
Highly sensitive to environmental changes
|
Less sensitive to environmental changes
|
8 |
Simple in construction and cheap
|
Complicated in construction and hence costly
|
9 |
Highly affected by nonlinearities
|
Reduced effect of non-linearity
|