Control System
Control System
A control system is a system of devices or set of devices that manages, commands, directs, or regulates the behavior of other devices or systems. Control systems are used in a wide range of applications, from simple household appliances to complex industrial processes.
Types of Control Systems[edit | edit source]
Control systems can be broadly classified into two categories:
Open-loop Control System[edit | edit source]
An open-loop control system is a type of control system in which the control action is independent of the output. In this system, the output is not compared with the input for control purposes. Examples include washing machines and toasters.
Closed-loop Control System[edit | edit source]
A closed-loop control system, also known as a feedback control system, is a type of control system in which the control action is dependent on the output. The system uses feedback to compare the actual output with the desired output response. Examples include thermostats and automatic voltage regulators.
Components of a Control System[edit | edit source]
A typical control system consists of the following components:
Sensor[edit | edit source]
A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument.
Controller[edit | edit source]
A controller is a device that receives the sensor signal and compares it with the desired setpoint. It then sends a control signal to the actuator to correct any deviation from the setpoint.
Actuator[edit | edit source]
An actuator is a device that converts the control signal from the controller into a physical action to control the process.
Feedback[edit | edit source]
Feedback is the process of using the output of a system to regulate its behavior. In a closed-loop control system, feedback is used to compare the actual output with the desired output and make necessary adjustments.
Applications of Control Systems[edit | edit source]
Control systems are used in various applications, including:
Control System Design[edit | edit source]
The design of a control system involves the following steps:
System Modeling[edit | edit source]
System modeling involves creating a mathematical model of the system to be controlled. This model represents the dynamic behavior of the system.
System Analysis[edit | edit source]
System analysis involves analyzing the system model to understand its behavior and performance characteristics.
Controller Design[edit | edit source]
Controller design involves designing a controller that will achieve the desired performance for the system.
System Implementation[edit | edit source]
System implementation involves implementing the designed controller in the actual system and testing its performance.
See Also[edit | edit source]
References[edit | edit source]
External Links[edit | edit source]
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Contributors: Prab R. Tumpati, MD
