제어로봇시스템학회:학술대회논문집
- 1998.10a
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- Pages.81-84
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- 1998
On-line Frequency Estimation Based on Cascade Adaptive Notch Filter and Application to Active Noise Control
- Kim, Sunmin (Mechanical Engineering Korea Advanced Institute of Science and Technology) ;
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Park, Youngjin
(Mechanical Engineering Korea Advanced Institute of Science and Technology)
- Published : 1998.10.01
Abstract
For ANC systems applied to aircrafts or passenger ships, engines from which reference signals are usually measured are located so far from seats where main part of controllers are placed. It can make feedforward ANC scheme difficult to implement or very costly. Feedback ANC algorithms which do not require reference signals and use error signals alone to update the filter, are usually sensitive to measurement noise ' and impulse noise. In this paper, reference signal needed for the feedforward control is not measured directly but generated with the estimated frequencies. Cascade adaptive notch filter (ANF), which has the low computational burden, is used to implement ANC system in real time. Several ANFs of order 2 are connected in series to estimate multiple sinusoids. Computer simulations and experiments in the laboratory for verifying efficacy of the proposed algorithm are carried out.
Keywords