 | PID (proportional-integral-derivative) controllers are widely used automated feedback control systems that maintain a process variable at a desired setpoint by continuously adjusting an output. They are a staple in industrial automation for regulating temperature, pressure, flow, and speed, and are used in applications like robotics, HVAC, and chemical processing to achieve stability and precision. The "three-term" controller works by calculating a control signal based on the current error (proportional), the accumulated past error (integral), and the future trend of the error (derivative). |
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