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.