含非线性干摩擦与粘滞阻尼系统的参数辨识  

Parameter Identification of a Single Degree-of-Freedom System with Both Coulomb and Viscous Damping

作　　者：张纪平[1] 熊晓燕[1] 熊诗波[1] 梁义维[2] 杨铁梅[3] 

机构地区：[1]太原理工大学机电工程研究所,太原030024 [2]太原理工大学机械学院,太原030024 [3]太原科技大学电子信息工程学院,太原030024

出　　处：《振动．测试与诊断》2008年第2期113-116,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:50335030,50405043);山西省自然科学基金资助项目(编号:2006011065)

摘　　要：推导了含有理想干摩擦环节的单自由度振动系统在加速度域的参数分离及辨识方法,结合EMD(Empirical Mode Decomposition,简称EMD)经验模态信号筛分技术,用含噪声的加速度衰减响应信号对系统进行了参数分离及辨识。仿真结果表明,粘滞阻尼辨识精度达到了97.068%,干摩擦阻尼辨识精度达到了95.43%。将该方法应用于某化工厂管道组成的振动系统,成功地进行了粘滞阻尼和干摩擦阻尼辨识。This paper presents a method for separating and identifying the coulomb and the viscous damping from the acceleration decrement response of a single degree-of-freedom system.Combined the experience modal decomposition(EMD) with the parameter identification method developed in this work,the viscous and the coulomb damping can be estimated from the signal polluted by noise.The simulation result shows that the identification accuracy of the viscous damping is 97.068% and the coulomb camping 95.43%.As an example,the method was successfully applied to the pipeline vibration system of a chemical plant.

关 键 词：单自由度系统 干摩擦 非线性振动 参数辨识 经验模态分解 阻尼分离 

分 类 号：O322[理学—一般力学与力学基础] TH117.1[理学—力学]