Research and application of a new type of linear second-order filter
LI Jun
WAN Wen-jun
WANG Yue-chao
Abstract：Aiming at the problem of time lag of linear second-order filter, a new method for the deformation structure of LCR and a new type of sinusoidal tracking is proposed. Through in-depth theoretical analysis for deformation structure, it is found that the second-order filter's lag problem is caused by LCR sinusoid tracking filter's characteristics. A novel sinusoidal tracker is constructed by orthogonal amplitude modulation and demodulation technology. By using this tracker, a novel second-order filter is built, which has strong characteristics with anti-noise and excellent linear filtering. The proposed method is one kind of the technology of linear filters. It can be applied in the signal filtering of classic control theory. The validity of the proposed method is analyzed through mathematical analysis, simulation experiment, and practical application.
Keywords：second-order filtersinusoid trackingLC filtersingle-frequency-pass filterinverse model
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 312-320 )