指数衰减正弦信号参数的估计与提取
王震 1文新宇 2杨黎明3
作者信息
- 1. 北京起重运输机械设计研究院有限公司 北京 100007;北京市自动化物流装备工程技术研究中心 北京 100007
- 2. 太原科技大学 太原 030024
- 3. 北京起重运输机械设计研究院有限公司 北京 100007;机械工业物料搬运工程技术研究中心 北京 100007
- 折叠
摘要
文中提出了一种阻尼正弦振荡通过观测器估计参数以及分离提取的方法.首先,给出利用辅助滤波器重构单频指数衰减,与多频指数衰减正弦信号的原理,并利用辅助变量解耦并重构单一频率分量和多频分量指数衰减信号.其次,通过辅助变量与衰减因子、频率的线性关系构造扩展观测器,估计出各频率分量阻尼正弦振荡信号的各衰减因子与各分量频率,然后构造观测器获取待估矢量,实现单频指数衰减正弦信号的提取;多频指数衰减正弦信号提取的过程,充分利用了已知信息,运算量小,简化解耦过程,稳定性易于保证.最后利用仿真模拟验证了所提观测器方法的效果.
Abstract
In this paper,a method of estimating parameters and separating extraction of damped sinusoidal oscillation through observer is proposed.Firstly,the principle of reconstructing single-frequency exponential decay and multi-frequency exponentially decaying sinusoidal signals by using auxiliary filters was given,and the single-frequency component and multi-frequency component exponentially decaying signals were decoupled and reconstructed by using auxiliary variables.Secondly,an extended observer was constructed through the linear relationship between auxiliary variables,attenuation factors and frequencies,and the attenuation factors and frequencies of damped sinusoidal oscillation signals of each frequency component were estimated.Then,the vector to be estimated was obtained by using the observer,and the single-frequency exponentially attenuated sinusoidal signal was extracted.During the extraction of multi-frequency exponentially decaying sinusoidal signals,the known information was fully utilized,thus reducing the calculation amount,simplifying the decoupling process,and ensuring the stability.Finally,the effect of the proposed observer method was verified by simulation.
关键词
指数衰减正弦/信号参数/扩展观测器/估计/提取Key words
exponentially decaying sine/signal parameters/extended observer/estimation/extraction引用本文复制引用
出版年
2023
国家科技期刊平台
NSTL
维普
万方数据