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
What is the difference between open-loop and closed-loop performance?
- Without the use of a feedback information system, an open-loop system works better than a closed-loop. Open-loop systems are immune to problems that can cause feedback loops, like noise interference or feedback stability issues.
What is an example of a closed-loop system?
- The main example of a closed-loop control system is a home thermostat. The thermostat sends a signal to the heater to turn it on or off. It uses temperature sensors for sensing current air temperature. If the temperature is less than the set point, it will turn on the heaters.
What is an open-loop system with an example?
- The example of an open-loop control system is a conventional toaster. The toaster users will know when it starts and finishes toasting and have small control over input also with process, time, and temperature.
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.