Hopf bifurcation of the maglev time-delay feedback system via pseudo-oscillator analysis

Hopf bifurcation of the maglev time-delay feedback system via pseudo-oscillator analysis
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通过伪振荡器分析磁悬浮时滞反馈系统的 Hopf 分岔

DOI:
10.1016/j.mcm.2010.04.014
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发表时间:
2010-09
影响因子:
--
通讯作者:
Lingling Zhang, Lihong Huang, Zhizhou Zhang
Lingling Zhang, Lihong Huang, Zhizhou Zhang
中科院分区:
--
文献类型:
--
作者:
Lingling Zhang, Lihong Huang, Zhizhou Zhang

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研究了具有时滞反馈信号的磁悬浮列车悬挂系统平凡解周围的局部动力学问题。利用特征根法对磁悬浮系统进行了线性稳定性分析,分析结果表明,当时滞超过某一临界值时,可能会出现Hopf分岔。为了深入了解周期运动,采用伪振子分析方法计算了分岔周期解,并确定了分岔的方向。与流形约简等广泛使用的方法不同,伪振子分析计算简单,预测局部动力学精度高。数值模拟结果表明,Hopf分岔的存在性和周期解的幅值可以由时滞和控制参数确定。因此,适当地选择它们可以有效地抑制车辆与导轨之间的振动。
This paper investigates the local dynamics around the trivial solution of suspension system of maglev train with time-delayed feedback signals. With characteristic root method, the linear stability analysis of the maglev system is obtained, which implies that a Hopf bifurcation may occur when time delay exceeds a critical value. To gain insight into the periodic motion, the pseudo-oscillator analysis is used to calculate the bifurcated periodic solution, and to determine the direction of the bifurcation. Unlike the widely used methods such as manifold reduction, the pseudo-oscillator analysis involves simple computation and gives prediction of the local dynamics with high accuracy. Numerical simulation results show that the existence of the Hopf bifurcation and the amplitude of the periodic solution can be determined by time delay and control parameters. So appropriately selecting them can restrain vibration between vehicle and guideway of the system effectively.
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