Part 7 Feedforward Control with filtered-X LMS algorithm

Feedback control is an important technique that is widely used in the process industries. Its main advantages are as follows: 1) Corrective action occurs as soon as the controlled variable deviates from the set point, regardless of the source and type of disturbance. 2) Feedback control requires minimal knowledge about the process to be controlled; it particular, a mathematical model of the process is not required, although it can be very useful for control system design. 3) The ubiquitous PID controller is both versatile and robust. If process conditions change, retuning the controller usually produces satisfactory control. 4) The feedforward Control with filtered-X LMS algorithm is used for active control of periodic noise. The filtered-X LMS algorithm (FXLMS) has been successfully applied to the active control of periodic and random noise and vibration.