What role do loops play in a control system?

In control systems, loops are essential as they facilitate continuous adjustment and regulation of the output based on feedback. A control loop typically consists of sensors that measure the output, a controller that compares the measured output with a desired setpoint, and actuators that adjust the input to the system based on the controller's commands.

This feedback mechanism allows the system to automatically correct deviations from the desired performance. For instance, in a temperature control system, if the temperature rises above a setpoint, the loop ensures that the cooling system is activated until the temperature falls back to the desired level. This continuous monitoring and adjustment help maintain system stability and performance, reflecting the fundamental role loops play in ensuring that a control system operates as intended.

The other options highlight different aspects of control systems but do not capture the primary function of loops. For example, while creating redundancy in a system can be important for reliability, it is not directly related to the role of loops. Similarly, limiting inputs to a single source may apply to specific configurations, but it does not define the purpose of loops in feedback and regulation.