自动化学报2017，Vol.43Issue(3)：478-486,9.DOI:10.16383/j.aas.2017.c160012
一种基于点频滤波器的微分信号提取方法
A New Method for Extraction of Process Differential Signal Based on Single-frequency-pass Filter
摘要
Abstract
Aimed at the severely amplified disturbance in the traditional differential operators and non-linear differential methods, a novel linear differential method is proposed. In this paper, the inter-relationship between step response and sine re-sponse of plants is analyzed. It is pointed out that under certain conditions, the differential component of the step response of a plant could be extracted from the sinusoidal excitation sig-nal upon the same plant. And a new method is proposed that step excitations of a plant could be transformed to sinusoidal excitations through single-frequency-pass filter. Furthermore, a logic structure to extract the differential component of pro-cess signals is constructed via single-frequency-pass filters and a new type sinusoid tracking filter. Superior anti-noise charac-teristics could be obtained with the proposed method, which is the development and extension of linear filters, and possesses good theoretical significance and practical application prospect. Mathematical analysis, simulation experiment, and practical ap-plication results have shown that the new method is correct and valid.关键词
阶跃函数激励/正弦函数激励/正交混频/点频滤波器/正弦跟踪微分器Key words
Step function excitation/sine function excitation/quadrature mixer/single-frequency-pass filter/sinusoid tracking differentiator引用本文复制引用
李军,万文军,胡康涛..一种基于点频滤波器的微分信号提取方法[J].自动化学报,2017,43(3):478-486,9.基金项目
国家自然科学基金(61473183)资助Supported by National Natural Science Foundation of China(61473183) （61473183）
