What is Control System.Control System Engineering.Open Loop and Closed Loop Control System.Explained

Summary

In this video, we dive into the basics of control systems, explaining the fundamental elements of a system: input, process, and output. We explore how systems operate and the role of controllers in regulating output. The video also covers the importance of mathematical models for analysis and design, including differential equations, transfer functions, and state space models. It introduces both open loop and closed loop control systems, highlighting their differences with real-world examples, such as cameras and water level control. This comprehensive introduction provides a foundational understanding of control systems for beginners.

Takeaways

• 😀 A system consists of three key elements: Input, Process, and Output.
• 😀 The output of a system is the result of processing the input through a series of operations.
• 😀 A control system allows us to manage the output of a system according to our needs or desires.
• 😀 The control system can be represented using mathematical models, such as differential equations, transfer functions, and state-space models.
• 😀 The design of a control system involves finding a mathematical model when the input and output are known.
• 😀 Open loop control systems do not have feedback from the output and are also known as manual control systems.
• 😀 An example of an open loop control system is a digital camera used to take and print a picture without feedback on the print quality.
• 😀 Closed loop control systems include feedback from the output, allowing for automatic adjustments to maintain the desired result.
• 😀 An example of a closed loop control system is a water level control system that continuously adjusts to maintain a desired tank level.
• 😀 The difference between the input and feedback signal in a closed loop system creates an error signal that is used by the controller to adjust the system’s output.

Q & A

What are the basic elements of a system?

A system consists of three basic elements: Input, Process, and Output.

How does a system produce its output?

The system produces the output as a result of an input being supplied to it, and it changes the input through a series of mechanical or chemical operations called the process.

What is the purpose of controlling the output of a system?

Controlling the output of a system allows it to perform the desired function, such as turning a bulb on or off according to our needs for light.

What are the key components in a control system?

A control system typically consists of a controller and a system block, where the controller generates a control signal that is sent to the system block to produce the desired output.

Why do we need a mathematical model in control systems?

Mathematical models are used to understand the relationship between input and output, which helps in the analysis and design of control systems.

What are the most commonly used mathematical models in control systems?

The most commonly used mathematical models in control systems are the differential equation model, transfer function model, and state space model.

What is the difference between an open loop and a closed loop control system?

An open loop control system does not have any feedback from the output, while a closed loop control system relies on feedback from the output to adjust the input and control the process.

What is an example of an open loop control system?

An example of an open loop control system is using a digital camera to take a photo and then printing it without any feedback from the output to improve the quality.

What is the role of feedback in a closed loop control system?

In a closed loop control system, feedback from the output is used to adjust the input via an error signal, ensuring that the system output matches the desired value.

Can you provide an example of a closed loop control system?

An example of a closed loop control system is maintaining the water level in a tank, where the system continuously senses the water level and adjusts the valve to maintain the desired level automatically.