Correct option is C
In control systems, the portion of the system that is to be controlled or regulated is known as the plant.
Here's a detailed explanation of each option:
(a) Feedback: · Feedback is a part of the control system where a portion of the output signal is fed back to the input to compare and adjust the input to achieve the desired output.
· Feedback is essential for maintaining stability and achieving accurate control, but it is not the portion being controlled.
(b) Comparator: · A comparator is a component in a control system that compares the reference signal (desired value) with the feedback signal (actual value).
· The comparator generates an error signal based on the difference between the reference and feedback signals.
· The comparator itself is not the portion being controlled but is part of the control mechanism.
(c) Plant: · The plant, also known as the process, is the portion of the system that is to be controlled or regulated.
· It is the part of the system that performs the primary function and where the control actions are applied to achieve the desired output.
· For example, in a temperature control system, the plant could be a heater or a cooler that needs to be regulated to maintain a specific temperature.
(d) Reference: · The reference, or setpoint, is the desired value of the output that the control system aims to achieve.
· It is the target value for the controlled variable and is not the portion being controlled but rather the goal for the control system.
