Research and application of a new type of sinusoid tracking differentiator
LI Jun
ZHU Ya-qing
CHEN Wen
WAN Wen-jun
CHEN Shi-he
HU Kang-tao
SU Kai
LI Feng
Abstract：Differential elements of the process signals are being widely applied in the field of control engineering, but the noise was significantly amplified by this traditional differential signal extraction method. By analyzing a deformation structure of traditional differential signal extractor and the composition of responses under step and slope incentives of the process signals, the differential signal can be extracted by sine or cosine filter signal under high frequency filtering conditions. Based on this result, a new differential extraction method composed of a sinusoid filter and a new sinusoid tracking coordinates was proposed. The quality of differential signal extracted by this method was improved dramatically with high proximity to ideal differential signal. Superior anti-noise characteristics could be obtained with the method proposed in this paper, which is the development and extension of linear filters, and has good theoretical significances and practical application prospects. The new signal processing method is a beneficial supplement to the classic control theory. Mathematical analysis, simulation experiment, and practical application results provide further evidence that the new method is correct and valid.
Keywords：sinusoid tracking differentiatorsinusoid filterdifferential signalstep function excitationslope function excitation
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 1182-1192 )