Frequency domain tuning approach for adaptive feedforward controllers

Abstract

Feedforward control provides a means for compensating measurable disturbances before the process output is affected. A novel tuning strategy for tuning feedforward controllers in frequency domain is developed in this thesis. The adaptive method consists of continuous identification of process transfer function (Gp) and disturbance transfer function(Gd) by the extended recursive least squares technique and subsequent tuning of a gain with lead-lag compensator (see document)