Difference between Open loop and Closed loop Control System

A control system can be classified as open loop control system and closed loop control system. There is a lot of confusion among people regarding these two types of control system. In this article, we will discuss what is the difference between open loop and closed loop control system based upon factors such as construction, stability, reliability, accuracy, examples, etc.

Difference between open loop and closed loop control System in tabular form

Open loop control system Closed loop control system
It is the system in which no feedback is present. It is the system in which feedback is present. There can be positive feedback or negative feedback.
It is also known as no feedback system. It is also known as feedback system.
The error detector is absent. The error detector is present.
These are less accurate systems. These are more accurate systems.
These are less reliable systems. These are reliable systems.
These systems are inexpensive. These systems are expensive.
These systems are simple to design. These systems are complicated to design or have a complex design.
The self-correction feature is absent in this system. The self-correction feature is present in this system. The feedback tries to correct the error between output and input.
The poles of the system are independent of the time domain parameters. The poles of the system are dependent on the time domain parameters.
The problem of stability is not a concern for this system. The problem of stability is a concern for this system. This system may become unstable.
The maintenance of this system is easy. The maintenance of this system is not easy.
This type of system has a fast response. This type of system has a slow response.
These systems are highly sensitive to environmental changes. These systems are less sensitive to environmental changes.
These systems are highly sensitive to disturbances. These systems are less sensitive to disturbances.
These systems have small bandwidth. These systems have large bandwidth.
The optimization is not possible. The optimization is possible.
It is highly affected by non-linearities. There is a reduced effect of non-linearities.
Examples:
Fan
Coal Iron
Traffic light
Automatic washing machine
Examples:
Automatic Iron
Speed control system
Air conditioners

Conclusion

The main difference between open loop and closed loop control system is that the closed loop control system has feedback whereas there is no feedback present in the open loop control system.

1 thought on “Difference between Open loop and Closed loop Control System”

  1. Now i have cleared my doubt about open and closed loop control system. Thanks for sharing this technical information in a very good and easy way. Subscribed your blog for updates.

    Reply

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