Title :
A New Approach on Parameter Identification in 2-DOF Localized Nonlinear Vibrating System
Author :
Yong Wang ; Dawei Zhao ; Zhiyin Li ; Shengmin Wu ; Wenbo Peng
Author_Institution :
China Ship Dev. & Design Center, Wuhan
Abstract :
A 2-DOF localized nonlinear vibrating system with quadratic nonlinear stiffness and damping is studied, spatial approach by which linear and nonlinear frequency response function is estimated is used to parametrically identify the nonlinear vibration model, and nonlinear stiffness coefficient and nonlinear damping coefficient of the model are optimized by least square method in this paper. The feasibility of the approach is validated by the experimental result, which showed that the approach have some reference value in identifying and optimizing the physical parameters, such as frequency response function and nonlinear stiffness and damping coefficient, of localized nonlinear vibrating system.
Keywords :
damping; elastic constants; frequency response; least squares approximations; nonlinear systems; parameter estimation; vibrations; 2-DOF localized nonlinear vibrating system; least square method; linear frequency response function; nonlinear damping coefficient; nonlinear frequency response function; nonlinear stiffness coefficient; parameter identification; quadratic nonlinear damping; quadratic nonlinear stiffness; Damping; Frequency domain analysis; Frequency estimation; Frequency response; Least squares methods; Marine vehicles; Nonlinear dynamical systems; Nonlinear equations; Optimization methods; Parameter estimation;
Conference_Titel :
Intelligent Systems and Applications, 2009. ISA 2009. International Workshop on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3893-8
Electronic_ISBN :
978-1-4244-3894-5
DOI :
10.1109/IWISA.2009.5072644
