Nonlinear behaviors as well as the bifurcation mechanism in switched dynamical systems

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• 作者：Ran Zhang (1)
  Yu Wang (2)
  Zhengdi Zhang (1)
  Qinsheng Bi (1)
  
  1. Faculty of Science ; Jiangsu University ; Zhenjiang ; 212013 ; People鈥檚 Republic of China
  2. Department of Mathematics and Computer Science ; York College ; The City University of New York ; New York ; NY ; 11451 ; USA
  
• 关键词：Centrifugal flywheel governor ; Switched dynamical system ; Chaotic oscillation ; Bifurcation mechanism
• 刊名：Nonlinear Dynamics
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：79
• 期：1
• 页码：465-471
• 全文大小：1,066 KB
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• 刊物类别：Engineering
• 刊物主题：Vibration, Dynamical Systems and Control
  Mechanics
  Mechanical Engineering
  Automotive and Aerospace Engineering and Traffic
  
• 出版者：Springer Netherlands
• ISSN：1573-269X

文摘

Dynamical model of a typical centrifugal flywheel governor system with periodic switches between two forms of external torque has been established, in which the state variables may be governed by two subsystems corresponding to autonomous and non-autonomous systems with periodic excitation, respectively. Two types of bifurcation can be observed in the autonomous subsystem, where the Hopf bifurcation may lead to the occurrence of periodic oscillation, while the fold bifurcation may result in the disappearance of the equilibrium points. The dynamics often behaves in periodic oscillations with the same frequency as the periodic switch, in which the switching points may divide the trajectory of the orbit into two groups of segments governed by the two subsystems, respectively. Cascading of period-doubling bifurcations related to the Floquet multiplier passing across the unit cycle can be observed, which cause the system to evolve to chaotic oscillations. Furthermore, because of the symmetry of the vector field, two attractors symmetric to each other can be obtained, which may interact with each other to form an enlarged attractor with the variation of the parameters. Generalized Hopf bifurcation may lead to the alternation of the behaviors between periodic movements and quasi-periodic oscillations.