What is the function of feedback loops in digital control systems?

Feedback loops are integral components of digital control systems, playing a crucial role in maintaining stability and enhancing performance. The primary function of a feedback loop is to continuously monitor the output of a system and compare it to the desired setpoint or target value. This comparison is essential for making real-time adjustments to the system's performance.

When the output deviates from the setpoint, the feedback loop processes this error signal and uses it to modify the input or control variables. This adjustment is vital for stabilizing the system, preventing oscillations, and ensuring the output remains within acceptable limits. By dynamically responding to changes in conditions or external influences, feedback loops enhance the system's ability to achieve consistent, optimal performance.

In contrast, the other options refer to functions unrelated to the core purpose of feedback loops. Data storage capacity and compatibility with sensors focus on different aspects of system design and operation, while user interface interactions pertain to usability rather than control system stability and efficiency. Thus, the function of feedback loops lies solely in their ability to maintain stability and improve overall system performance through real-time adjustments.