The error of inductosyn Angle measurement system will cause ripple of speed in DC motor control system. This error is equal to adding a disturbance to the input.
Active Filter access point and then after the line current harmonics back to the company as the regulator's input, adjusting the feedforward controlerror.
再将有源滤波器接入点后的线上电流的谐波分量反馈回来，作为调节器的输入，调整前馈控制的误差。
3
PID controller, inputerror adaptive controller and output error adaptive controller have designed to study the vertical instability control of the HL-2A plasma.