Study on simulation of AVI based on adaptive notch filter

The adaptive notch filter can attenuate signals at notch frequencies with little influence on signals at other frequencies. Thus it is widely used in active noise control and signal pick-up. Based on this property, a novel control method is proposed, in which sinusoidal signals with the same frequency of disturbance signal are used as reference input of the controller, and Fx-LMS algorithm is adopted to adjusted controller weights. It is proved that such control architecture for single or multiple frequencies vibration is equivalent of an adaptive notch filter, which means the proposed method may filter the periodic disturbance. Simulation results show that even if there is random disturbance, the method can also control the periodic vibration disturbance effective.