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基于忆阻器反馈的Lorenz超混沌系统及其电路实现

阮静雅 孙克辉 牟俊

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基于忆阻器反馈的Lorenz超混沌系统及其电路实现

阮静雅, 孙克辉, 牟俊

Memristor-based Lorenz hyper-chaotic system and its circuit implementation

Ruan Jing-Ya, Sun Ke-Hui, Mou Jun
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  • 采用二次型磁控忆阻器作为系统的正反馈项,设计了一个超混沌电路,建立了该系统的无量纲数学模型,探讨了忆阻器混沌系统与原混沌系统的不同之处.分析了系统的平衡点集和稳定性,发现系统继承了原系统的对称性,确定了系统参数所对应的稳定和不稳定区域分布,得到了系统的稳定和不稳定平衡点集.采用分岔图、Lyapunov指数谱、Poincar截面等分析方法,研究了系统的动力学行为随系统参数和忆阻器初始状态而变化的情况,观察到了混沌系统随忆阻器初值不同引起的吸引子共存和状态转移现象,结合相图与谱熵算法分析了状态转移现象.设计并实现了该系统的模拟电子电路,实验结果表明,电路实验结果与数值仿真结果相吻合,为忆阻器混沌电路的实际应用奠定了基础.
    To study the application of memristor in chaotic system, we employ the smooth continuous nonlinear flux-controlled memristor model and feedback control technique to design a hyperchaotic system based on the simplified Lorenz system. By using memristor as a positive feedback of the simplified Lorenz system, the dimensionless mathematical model is derived. The differences between the memristor-based chaotic system and ordinary chaotic system are then further studied. Firstly, the stable equilibrium and unstable equilibrium point sets of the system are analyzed theoretically, and it is found that the system has infinite equilibrium points including stable and unstable equilibrium points. The stable and unstable ranges of the system with different parameters are also determined. Theoretical analysis shows that the system has the same symmetry as the simplified Lorenz system. Thus the system has rich dynamical behaviors, such as limit cycle, chaotic attractor, and hyper-chaotic attractor. Secondly, by the methods of bifurcation diagram, Lyapunov exponent spectrum, Poincar section, and Spectral Entropy algorithm, the dynamical behaviors of the system are analyzed in detail. By calculating the Lyapunov exponent spectrum, the dynamical behaviors are studied and they change with system parameters and the initial conditions of memristor respectively. The maximum positive Lyapunov exponent of the memristor-based Lorenz hyperchaotic system is higher than that of the simplified Lorenz system, which indicates the memristor-based Lorenz hyperchaotic system is more complex. Further, we find all the complex dynamical behaviors to be coexisting with the infinite equilibrium sets, which is quite different from those of many ordinary hyper-chaotic systems. Meanwhile, we observe the attractors coexisting and state transition phenomenon in this system, caused by changing the initial conditions of the memristor. State transition phenomenon is then further studied by means of phase portraits and spectral entropy algorithm for the first time. Finally, by using operational amplifiers, diodes and other discrete components, we design an equivalent circuit of the smooth continuous nonlinear flux-controlled memristor model, and the equivalent circuit is used to design and realize the analog electronic circuit of the memristor-based Lorenz hyper-chaotic system. By using an analog oscilloscope, the phase portraits of hyper-chaotic attractor are observed clearly. The state transition phenomenon can also be seen using the oscilloscope. It is found that the circuit experimental results are in agreement with those of the theoretical analysis and numerical simulation. It verifies that the system is physically realizable, and lays a strong foundation for its applications in engineering. Next, we will try to investigate the chaotic secure communication based on this hyper-chaotic system.
      通信作者: 孙克辉, kehui@csu.edu.cn
    • 基金项目: 国家自然科学基金(批准号:61161006,61573383)资助的课题.
      Corresponding author: Sun Ke-Hui, kehui@csu.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61161006, 61573383).
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    Chua L O 1971 IEEE Trans. Circ. Theory 18 507

    [2]

    Chua L O, Kang S M 1976 Proc. IEEE 64 209

    [3]

    Strukov D B, Snider G S, Stewart D R, Stanley W R 2008 Nature 453 80

    [4]

    Williams R 2008 IEEE Spectrum 45 28

    [5]

    Chua, L 2013 Nanotechnology 24 383001

    [6]

    Kim H, Sah M P, Yang C, Roska T 2012 Proc. IEEE 100 2061

    [7]

    Li Q, Tang S, Zeng H, Zhou T 2014 Nonlinear Dyn. 78 1087

    [8]

    Lorenz E N 1963 J. Atmos. Sci. 20 130

    [9]

    Jia Q 2007 Phys. Lett. A 366 217

    [10]

    L J, Chen G 2011 Int. J. Bifurcat. Chaos 12 659

    [11]

    Bao B C, Liu Z 2008 Chin. Phys. Lett. 25 2396

    [12]

    Sprott J C, Thio W, Zhu H 2014 IEEE Trans. Circuits Syst. Ⅱ: Exp. Briefs 61 977

    [13]

    Sun K, Sprott J C 2009 Int. J. Bifurcat. Chaos 19 1357

    [14]

    Yu H, Cai G, Li Y 2012 Nonlinear Dyn. 67 2171

    [15]

    Sun K, Liu X, Zhu C, Sprott J C 2012 Nonlinear Dyn. 69 1383

    [16]

    Wen S, Zeng Z, Huang T 2012 Phys. Lett. A 376 2775

    [17]

    Ding S, Wang Z 2015 Neurocomputing 2 16

    [18]

    Bao B C, Liu Z, Xu J P 2010 Electron. Lett. 46 237

    [19]

    Bao B, Xu J, Liu Z 2010 Chin. Phys. Lett. 27 51

    [20]

    Bao B C, Xu J P, Zhou G H, Ma Z H, Zhou L 2011 Chin. Phys. B 20 120502

    [21]

    Bao B, Ma Z, Xu J, Liu Z, Xu Q 2012 Int. J. Bifurcat. Chaos 21 2629

    [22]

    Petrá, Ivo 2010 IEEE Trans. Circuits Syst. Ⅱ: Exp. Briefs 57 975

    [23]

    Huang J, Wei P, Zhu Y, Yan B, Xiong W, Hu Y 2015 Advances in Global Optimization (Switzerland: Springer International Publishing) pp523-527

    [24]

    Andrewl F, Dongsheng Y, Herberth C I U, Sreeram V 2012 Int. J. Bifurcat. Chaos 22 1250133

    [25]

    Bharathwaj M, Chua L 2012 Int. J. Bifurcat. Chaos 20 1567

    [26]

    Xu B R 2013 Acta Phys. Sin. 62 190506 (in Chinese) [许碧荣2013物理学报62 190506]

    [27]

    Xi H, Li Y, Huang X 2014 Entropy 16 6240

    [28]

    Wen S, Zeng Z, Huang T, Chen Y 2013 Phys. Lett. A 377 2016

    [29]

    Lin T, Huang F 2014 IEEE International Conference on Fuzzy Systems Beijing, China, July 6-11, 2014 p2551

    [30]

    Li Q, Hu S, Tang S, Zeng G 2014 Int. J. Circuit. Theor. Appl. 42 1172

    [31]

    Ma J, Chen Z, Wang Z, Zhang Q 2015 Nonlinear Dyn. 8 1

    [32]

    Vaněček A,Čelikovský S 1998 Automatica 34 1479

    [33]

    Sun K, D Li-Kun, Dong Y, Wang H, Zhong K 2013 Math. Probl. Eng. 2013 256092

    [34]

    Sun K H, He S B, He Y, Yin L Z 2013 Acta Phys. Sin. 62 010501 (in Chinese) [孙克辉, 贺少波, 何毅, 尹林子2013物理学报62 010501]

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出版历程
  • 收稿日期:  2016-03-08
  • 修回日期:  2016-07-04
  • 刊出日期:  2016-10-05

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