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Issue:
EXTRACTION OF MODAL PARAMETERS BASED ON SIGNAL MATCHING PURSUIT
Author(s):
ZHU Qi-bing
,
ZHAO Wen-li
,
LIU Jie
,
CHEN Li-ping
Pages:
149
-
151
Year:
2007
Issue:
7
Journal:
JOURNAL OF VIBRATION AND SHOCK
Keyword:
信号匹配追踪
;
Laplace小波
;
粒子群算法
;
模态参数
;
脉冲响应函数
;
Abstract:
传统的的设备模态参数提取多是建立在频谱计算的基础上,提取精度受采样频率和时域截断产生的能量泄漏的影响较大.为此,提出了一种基于信号匹配追踪的模态参数提取方法,该方法将Laplace小波作为信号匹配追踪的基元函数;同时引入粒子群算法来实现Laplace小波的参数寻优,克服了传统算法计算复杂的缺点.仿真和实际应用表明,该方法可有效地提取设备的模态参数;且比传统的半功率带宽法具有更高的精度.
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