Application of higher order spectrum in analysis of magneto-rheological damper control
Higher order spectral analysis can be used to identify nonlinearities in the complex dynamical systems. This proposal shows that the contributions of the bispeetrum, trispeetrum, reconstructed bispeetrum and reconstructed power spectrum in terms of the system frequency response function and elementary physical properties of the MR damping system. Subsequent estimates of the HOS based on the output stochastic oscillating signals appear distinct variation. An experimental platform for MR vibrating semi-active control is built, proper simplifications are presented, an AR(10) model is established with colored noises from the output signals. Comparison between power spectrum from second order moment function and bispectrum, trispectrum are taken. The later gives an indication of the correlation between the phases of different frequency components. Since time series model is a parametric model, the reconstructed bispectrum and power spectrum are smooth. It is demonstrated that the higher order spectra are effectively for recognition and description of nonlinear systems.
MRF vibrating control time series higher order spectrum bispectrum trispectrum
LIU Xiao-mei(刘晓梅) HUANG Yi-jian(黄宜坚) CHEN Jun-jie(陈俊杰)
College of Mechanical Engineering and Automation, Huaqiao University, Quanzhou 362021, Chin
国际会议
长沙
英文
256-260
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）