Measuring, comparing, computing, along with what else comprise the 4 basic things any control system must perform?

The four basic functions of any control system are measuring, comparing, computing, and correcting. Correcting is crucial as it involves making adjustments based on the outcomes of the comparison between the desired and actual system performance. After measuring the actual value of a variable and comparing it to the setpoint or desired value, the system must take corrective actions to minimize any error, ensuring that the system behaves as intended and maintains stability.

This process can include various methods, such as increasing or decreasing inputs or making adjustments to system parameters. In a control system, this feedback loop is fundamental; without the correction step, the system would not be able to respond adequately to deviations from the desired performance, ultimately leading to poor functionality or failure to meet objectives. Therefore, correcting directly reinforces the effectiveness of measuring, comparing, and computing, making it an essential component in control systems.