
Bifurcation and chaos characteristics of hysteresis vibration system of giant magnetostrictive actuator
HongBo Yan(闫洪波), Hong Gao(高鸿), GaoWei Yang(杨高炜), HongBo Hao(郝宏波), Yu Niu(牛禹), Pei Liu(刘霈)
Chin. Phys. B, 2020, 29 (2):
020504.
DOI: 10.1088/16741056/ab65b4
Chaotic motion and quasiperiodic motion are two common forms of instability in the giant magnetostrictive actuator (GMA). Therefore, in the present study we intend to investigate the influences of the system damping coefficient, system stiffness coefficient, disc spring cubic stiffness factor, and the excitation force and frequency on the output stability and the hysteresis vibration of the GMA. In this regard, the nonlinear piezomagnetic equation, JilesAtherton hysteresis model, quadratic domain rotation model, and the GMA structural dynamics are used to establish the mathematical model of the hysteresis vibration system of the GMA. Moreover, the multiscale method and the singularity theory are used to determine the codimensional twobifurcation characteristics of the system. Then, the output response of the system is simulated to determine the variation range of each parameter when chaos is imposed. Finally, the fourthorder RungeKutta method is used to obtain the time domain waveform, phase portrait and Poincaré mapping diagrams of the system. Subsequently, the obtained three graphs are analyzed. The obtained results show that when the system output is stable, the variation range of each parameter can be determined. Moreover, the stability interval of system damping coefficient, system stiffness coefficient, and the coefficient of the cubic stiffness term of the disc spring are obtained. Furthermore, the stability interval of the exciting force and the excitation frequency are determined.
