Following are the difference between open loop control system and close loop control system
| Open loop control system | Close loop control system |
|---|---|
| Its operation is degraded if non linearity is present. | Its operation is not independent on conditions. |
| A control system in which the control action is totally independent of output of the system then it is called open loop control system. | Control system in which the output has an effect on the input quantity in such a manner that the input quantity will adjust itself based on the output generated is called closed loop control system. |
| It is dependent on operating condition. | It is not dependent on operating conditions. |
| The open loop control system is more sensitive to noise. | The close loop control system is less sensitive to noise. |
| It is simple and economical. | It is complex and costlier. |
| Open loop does not require feedback path element. | Close loop requires feedback path element. |
| It is more stable. | It is less stable. |
| It has small bandwidth. | It has large bandwidth. |
| It is easier to construct. | It is complicated to construction. |
| It has poor accuracy. | It has better accuracy. |
| Open loop has slow response. | Close loop has fast response. |
