A Novel Hybrid Structure for Narrowband Nonlinear Active Noise Control
LUO Lei;SUN Jin-wei;HUANG Bo-yan;BAI Zong-long;School of Electrical Engineering and Automation,Harbin Institute of Technology;
Analyzing the primary noise of an ANC system which contains narrowband reference signal,nonlinear primary path and non-minimum phase secondary path,and exploring the feedback structure based on FIR filter and the feedforward structure based on FLANN filter. By discussing the advantage and the disadvantage of these two structures,we proposed a newhybrid structure in this paper. Proposed FLANN-FIR structure composites the advantages of feedforward and feedback structures,not only the predictable noise can be reduced,but also the unpredictable noise can still be suppressed.Simulations under the cases of different signal noise ratio and different nonlinear primary path demonstrate that proposed hybrid structure performs best on the convergence rate and steady-state property.