Adaptive Harmonic Steady‐State Disturbance Rejection with Frequency Tracking

摘要: This paper is concerned with the rejection of sinusoidal disturbances unknown frequency acting at output plants. Disturbance based on an adaptive harmonic steady-state (ADHSS) algorithm combined a magnitude/phase locked-loop (MPLL) estimator. The method assumes that plant can be approximated by its response. For high-order plants such as those encountered in active noise and vibration control (ANVC), this assumption greatly reduces number parameters enables online estimation response using simple algorithms. shows when MPLL integrated ADHSS algorithm, two components work together way input does not prevent tracking MPLL, so order reduced. Thus, addition allows to considered without significantly increasing complexity original ADHSS. After analyzing reduced-order ideal case, equations describing complete system are considered. theory averaging used gain insight into behavior algorithm. It found has two-dimensional equilibrium surface disturbance cancelled exactly. A subset proved locally stable. Extensive experiments demonstrate performance even changing.