Controller, PID Controller
The controller is used on personal computers with spectrum analyzers, a strain-gauge station or a seismic station with analogue and digital inputs and outputs connected to it.
Controller performs the functions of a two-position and proportional-integral-derivative (PID) controller providing parameter control and adjustment in process control and adjustment systems for industrial enterprises. The output can be represented as pulsewidth modulation (PWM).
During PID control, the control signal depends on the difference between the measured parameter and the set value, on the integral derived from the difference and on the parameter change speed. As a result, the PID controller provides the actuating device with such a state (intermediary between “On” or “Off”) in which the measured parameter equals the set one. Since the state of the actuating device stabilizes, the accuracy of parameter maintenance in the system increases dozens of times. Thus, the control law provides accuracy.
The control signal for the PID controller is determined by three components: proportional, integral, and differential. The control signal generated by the controller is defined by the following: how great the mismatch is (proportional component), how long the mismatch lasts (integral component), and, finally, how fast the mismatch changes (differential component).
The controller can maintain the set level or function by the set profile. In addition, the controller program graphically displays the set level or profile, the current parameter value, and the output signal.