FREQUENCY DOMAIN ITERATIVE FEEDFORWARD/FEEDBACK TUNING FOR MIMO ANVC*

A new iterative feedback/feedforward tuning (IFFT) method is presented for multiple-input multiple output (MIMO) control systems that relies on efficient computation of the negative gradient of the controller cost function in the frequency domain. The iterative method is using only one experiment per iteration and it is therefore suitable for realtime implementation for periodic adjustment of the controller. The primary target application area of the presented method is self-tuning feedback control in active noise and vibration control (ANVC).