힐버트 변환을 이용한 주기적인 외란 및 잡음 제거PERIODIC DISTURBANCE AND NOISE REJECTION METHOD USING HIRBERT TRANSFORM

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In this paper, we propose a novel adaptive feedforward controller for periodic disturbance and noise cancellation, with a frequency tracking capability. It can be added to an existing feedback control system without altering the original closed-loop characteristics, which is based on adaptive algorithm. We introduce novel algorithm "Constrained AFC(adaptive feedforward controller) algorithm" that increase the convergence region regardless of the delay in the closed loop system. In the algorithms, coefficients of the controller are adapted using the residuals of constrained structure which are defined in such a way that the coefficients become time invariant. The proposed algorithm not only estimate the magnitude and phase of the tonal disturbance and noise but also track the frequency of the tone, which changes in quasi-static manner. The frequency tracking algorithm uses the instantaneous frequency approach based on Hilbert transform. A number of computer simulations have been carried out in order to demonstrate the effectiveness of proposed method under various conditions.
Publisher
한국소음진동공학회
Issue Date
2000-01
Language
KOR
Citation

한국소음진동공학회 2000년 추계학술대회, pp.443 - 448

URI
http://hdl.handle.net/10203/137759
Appears in Collection
ME-Conference Papers(학술회의논문)
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