Difference Between Open Loop & Closed Loop System

Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Open Loop & Closed Loop Systems.  in an open-loop system there is no influence of control action on the open-loop system. But in a closed-loop system control action has influence or required output depends on the control action.

In today’s post, we will have a detailed look at both open and closed-loop systems with the detailed and compare them to discuss their differences. So let’s get started with the Difference Between Open Loop & closed-loop System.

Difference Between Open Loop & Closed Loop System

Open Loop System

• An open-loop system also named a nonfeedback controller means there is no control of output at the input.
• There is no feedback given to the input side.
• Its practical example is on and off the process of tap, different machines motors operation
• It cannot reduce any error that occurs

• An example of open-loop is boiler control the use of a timer when its desired option gets timer off it
• Its prices is lower and simple circuitry and easy to maintain
• A cloth dryer is an open-loop system
• It is employed in such applications where complicated structures are needed like a simple process and fewer prices.
• A simple example where it is used is your home cloth dries that are controlled by the users not need certain arrangements to operate.
• There is another example is an irrigation sprinter operation that measures the moisture in the field
• This system is more stable than the closed system.
• It can not be optimized.
• The elements of this system are the Controller and the Controlled Process.
• Its construction is less complicated than the closed-loop system.
• Its reliability is less than the closed-loop system.
• Its accuracy relies on calibration.

Closed-Loop System

• Such a system whose resultant output depends on the control action of the system is called a closed-loop system.
• It also is known as a feedback system.
• The main elements of this system are the Amplifier, Controller, Controlled Process, and Feedback.
• Its physical structure is more complicated than the open-loop system.
• Its response time is less than the open-loop system.
• It can be easily calibrated and there is no need for certain modification

• The disturbance of the system does not affect the closed-loop system.
• It is a linear system and all results are shown at a single graphical line
• Its reliability is larger than the open-loop system.
• Its accuracy is largely due to the use of feedback. that affect the overall results and give better output
• Its stability is less than the open-loop system the main cause is to give feedback to the input
• Examples of this system are the Air conditioner, temperature control system, speed, and pressure control system.

Open-Loop Control System vs Closed-Loop Control System

Open Loop Control System

• The control system without a feedback path called open a loop control system.
• It is also called a non-feedback control system
• The control process is not based on the output of the complete system
• The design and structure of the open loop is simple.
• It provides high-speed response since there  is no  measuring and feedback output
• Its basic components are the controller and the plant.
• It is a less reliable system.
• Its accuracy open loop control system based on calibration so it is less.
• it is a highly stable system output of is constant
• It is not optimized and needs less maintenance
• It can easily apply
• It is low-cost system
• It produces high noise

Closed Loop Control System

• In this system feedback path called a closed-loop control system
• It is also called the feedback control system
• Control action is based on the output of the system
• It is a complex design and difficult construction.
• Its main parts are Controller, plant or process, feedback element, and comparator used for error detection
• It is slow due to the existence of feedback
• It is highly reliable and highly accurate than an open-loop control system
• It is a less stable system and optimized to get the required result
• It needed high maintenance.
• It isn’t easy to apply and a high-cost system
• It has low inner noise
• Common applications are ACs, toasters, rocket launching systems, fridges, radar tracking systems

FAQS

That is all about the difference between open-loop and closed-loop systems. If you have any queries ask in the comments. Thanks for reading. Have a good day.