Nonlinear dynamic characteristics and control of giant magnetostrictive-piezoelectric composite actuator

2019 ◽  
Vol 59 (1) ◽  
pp. 291-298
Author(s):  
Zhiwen Zhu ◽  
Fang Liu ◽  
Hui Sheng ◽  
Jia Xu
Keyword(s):  
Dynamic Characteristics ◽  
Nonlinear Dynamic ◽  
Piezoelectric Composite ◽  
Nonlinear Dynamic Characteristics ◽  
Composite Actuator ◽  
And Control

Nonlinear dynamic characteristics and control of Galfenol-Shape Memory Alloy composite plate subjected to stochastic excitation

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1547-1554
Author(s):  
Xiao-Huan Li ◽  
Fang Liu ◽  
Jia Xu ◽  
Zhi-Wen Zhu
Keyword(s):  
Optimal Control ◽  
Dynamic Characteristics ◽  
Control Strategy ◽  
Nonlinear Dynamic ◽  
Composite Plate ◽  
Vibration Reduction ◽  
Stochastic Excitation ◽  
Optimal Control Strategy ◽  
Nonlinear Dynamic Characteristics ◽  
And Control

In this paper, the nonlinear dynamic characteristics and control of a Galfenol-shape memory alloy (SMA) composite plate under stochastic excitation are studied. New nonlinear differential terms are applied in the constitutive modeling of Galfenol alloy and SMA, and the nonlinear dynamic model of the composite system is developed. The drift coefficient and the diffusion coefficient are calculated to obtain the steady-state probability density function of the system, and finally the optimal control strategy is proposed to improve the effects of vibration reduction. Numerical simulation and experiments results show that the system has abundant nonlinear dynamic characteristics, including stochastic Hopf bifurcation and limit cycle bifurcation. The stochastic optimal control strategy can improve the effects of vibration reduction efficiently. These results are helpful for the application of Galfenol-SMA composite structures.

Nonlinear Dynamic Characteristics of Bubbling Fluidization

2012 ◽  
pp. 300-331 ◽  
Author(s):  
Reza Zarghami ◽  
Navid Mostoufi ◽  
Rahmat Sotudeh-Gharebagh ◽  
Jamal Chaouki
Keyword(s):  
Dynamic Characteristics ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic Characteristics
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