In cruise control, the output would be the throttle valve, in a heating system, the output might be a 3 way valve in a heating loop, or the amount of fuel applied to a boiler. The output is the controlled value of a PID controller. For cruise control this would be the actual vehicle speed, or in a heating system, this would be the current temperature of the system. The process value is the value that is being controlled. The set point is normally a user entered value, in cruise control it would be the set speed, or for a heating system, it would be the set temperature. And also the PID Simulator page to use a live PID Simulator!īefore we dive into the PID controller, there is a few terms that need defined: PID Controller Terms: Set Point
See post “ WHAT IS A PID CONTROLLER?” for a basic example of a PID controller. A PID (Proportional Integral Derivative) controller works by controlling an output to bring a process value to a desired set point.
