Abstract
Time series AR models (AutoRegressive models) are established with the use of the colored noise filtered by vibration signals,so as to study vibration characteristics of the magnetorheological damper under different working currents and frequencies .Because vibration signals are non-stationary and nonlinear , signal processing tool of trispectrum is introduced.The trispectrum are utilized for analyzing dynamic frequency characteristics of the magnetorheological damper. The result shows that the trispectrum slices can quantificationally describe nonlinear coupling, restrain gaussian noise and reserve phase components. Characteristics of the trispectrum is closely related to the current and frequency .The trispectrum slices can be used to describe laws of vibration system effectively.
Publisher
Trans Tech Publications, Ltd.
Reference9 articles.
1. Huang Haocai. Magnetorheological technology and its application in mechanical engineer- ing. Manufacturing Technology & Machine tool [J]. 2003. 4: 24-26.
2. Barker R W, Klutke G, Hinich M J. Monitoring rotating tool wear using high-order spectral features. A SM E Transactions, Journal of Engineering for Industry, 1993, 115(1): 23-29.
3. Liang B, Gu F, Ball A D. Higher order spectrum analysis in fault diagnosis of induction motors. Proc Integration Dynamics, Condition Monitoring and Control for the 21th Century, 1999: 349-352.
4. Chen Bingsan, Huang Yijian. Study on the Trispectrum and Its Slices[C]/2008 Chinese Control and Decision Conference. Yantai: IEEE Computer Society, 2008. 5124 -5129.
5. COLLISW B, WHITE P R. Higherorder spectra: the bispectrum and trispectrum [J]. Mechanical Systems and Signals Processing , 1998, 12(3): 375-394.