Open Loop Control System: An open loop control system is the system, in which the desired output is only depends on the input signal. If there is disturbances in between, the output does not give any changes with respect to this disturbances. An open loop control system is generally known as system without feedback

Closed Loop Control System: The closed loop control system is the system, in which the desired output depends on the input and the feedback element. If there is any disturbances occur in the system or it may be outside, the system controller automatically changes with respectively. This system is known as Feedback control system