Difference between Open-Loop Control System and Closed-Loop Control System

Control System is a system in which the behavior of the system is determined by a differential equation. It manages the devices and the systems using control loops. There are Open-Loop Control System and Closed-Loop Control System. 

Open-Loop Control System is used in applications in which no feedback and error handling are required. It is simple and economical but optimization is not possible. Maintenance of OPCS is easier. 

Closed-Loop Control System is used in applications where feedback and error handling are required. It is a complex system and not economical but optimization is possible. Maintenance of CLCS is difficult. 

The following table differentiates Open-Loop Control System and Closed-Loop Control System:  

S.No.	Open-Loop Control System	Closed-Loop Control System
1.	It easier to build.	It is difficult to build.
2.	It can perform better if the calibration is properly done.	It can perform better because of the feedback.
3.	It is more stable.	It is comparatively less stable.
4.	Optimization for desired output can not be performed.	Optimization can be done very easily.
5.	It does not consists of feedback mechanism.	Feedback mechanism is present.
6.	It requires less maintenance.	Maintenance is difficult.
7.	It is less reliable.	It is more reliable.
8.	It is comparatively slower.	It is faster.
9.	It can be easily installed and is economical.	Complicated installation is required and is expensive.

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