摘要
提出一个新的非线性模态参数识别的方法──曲面拟合方法.该方法根据 Volterra函数级数理论,在识别出非线性系统高阶传递函数的基础上,分析了非线 性高阶传递函数的分布特征,建立一个差频坐标系,对非线性高阶传递函数进行对角 化处理,进而进行整体曲面拟合(SFM),实现非线性模态参数的识别。
A new method of identification of non-linear modal parameters-surface fitting (SFM) is developed. From volterra function series theory, the high order transfer function of a non-linear system is recognized. The distribution features of the high order transfer function are analyzed, and the function is diagonally transformed on a difference frequency coordinate system. A global surface fitting is carried out, the non-linear modal parameters are identified.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
1990年第6期679-685,共7页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目
关键词
非线性系统
模态参数识别
综合法
transfer function
modal synthesis method, surface fitting, non-linear systems