Fractional derivative and time delay damper characteristics in Duffing–van der Pol oscillators
Author(s)
Author(s)
Guo, Z.
Yang, H. X.
Date Issued
2013
Publisher
Elsevier
Journal
Communications in Nonlinear Science and Numerical Simulation
Volume
18
Issue
10
Start page
2900
End page
2915
Abstract
In this paper, we investigate the damping characteristics of two Duffing–van der Pol oscillators having damping terms described by fractional derivative and time delay respectively. The residue harmonic balance method is presented to find periodic solutions. No small parameter is assumed. Highly accurate limited cycle frequency and amplitude are captured. The results agree well with the numerical solutions for a wide range of parameters. Based on the obtained solutions, the damping effects of these two oscillators are investigated. When the system parameters are identical, the steady state responses and their stability are qualitatively different. The initial approximations are obtained by solving a few harmonic balance equations. They are improved iteratively by solving linear equations of increasing dimension. The second-order solutions accurately exhibit the dynamical phenomena when taking the fractional derivative and time delay as bifurcation parameters respectively. When damping is described by time delay, the stable steady state response is more complex because time delay takes past history into account implicitly. Numerical examples taking time delay and fractional derivative are respectively given for feature extraction and convergence study.
SFU Affiliated Publication
No
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