非线性动力学系统的辨识：时频 滤波与骨架曲线OA北大核心CSCD
Identification of Nonlinear Dynamic Systems: Time_Frequency Filtering and Skeleton Curves
利用非平稳信号的时频分析方法研究了一类非线性系统的频率特性和阻尼特性随运动形态的变化规律，得到了能简洁、直观地反映系统基本非线性动力学特性的广义骨架线性系统(简称GSLS)和骨架曲线,在此基础上，利用时频滤波方法根据系统非平稳响应信号对非线性系统进行辨识,该项工作为非线性系统反问题的研究提供了一条新的途径,
The nonlinear behavior varying with the instantaneous response was analyzed through the joint time_frequency analysis method for a class of S.D.O.F nonlinear system. A masking operator on definite regions is defined and two theorems are presented. Based on these, the nonlinear system is modeled with a special time_varying linear one, called the generalized skeleton linear system(GSLS). The frequency skeleton curve and the damping skeleton curve are defined t…查看全部>>
王丽丽;张景绘
西安交通大学 建筑工程与力学学院中国科学院 力学研究所
数理科学
系统识别非线性动力学系统非平稳信号时频分析希尔伯特变换
《应用数学和力学》 2001 (2)
182-190,9
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