What is the function of an actuator in control systems?

In control systems, an actuator serves a critical role in transforming control signals into physical movement or action. Specifically, actuators are responsible for positioning dampers and controlling valves, making them essential components in various applications, such as HVAC systems, process control, and automation.

When, for example, a control system determines that a change is needed in airflow or fluid flow, it sends a signal to the actuator, which then physically adjusts the position of dampers or valves accordingly. This ensures that the system operates efficiently and precisely meets the desired setpoints for environmental or process conditions.

While other functions mentioned, such as measuring air quality, heating and cooling spaces, or regulating power supply, are important in their contexts, they do not describe the primary function of an actuator. Instead, these tasks are typically carried out by different system components that work in conjunction with actuators to achieve the overall functionality of the control system.