共查询到20条相似文献,搜索用时 62 毫秒
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随着虚拟仪器技术的飞速发展,为研究非线性系统提供了新途径。讨论了基于虚拟仪器四翼混沌吸引子的研究模式,设计了软件系统,并给出了基于虚拟仪器技术实验系统的拓扑结构,为研究非线性系统提供了可行的方案。利用此方案进行初步的实验,结果证明此实验系统在参数调节方面、可靠性,实时性等具有良好的实验效果。 相似文献
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利用Buck变换器的输出电压时间序列可以进行变换器的混沌吸引子重构,其中延迟量可以通过时间序列的自相关函数来确定,而重构维数也可根据混沌吸引子的关联维来确定,仿真和特征参数计算均表明Buck变换器的重构混沌吸引子与原混沌吸引子拓扑等价,具有相同的动力学性质和几何性质,另外,构建了一个延迟重构实验电路,得到的实验波形也验证了上述结果。 相似文献
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利用Buck变换器的输出电压时间序列可以进行变换器的混沌吸引子重构,其中延迟量可以通过时间序列的自相关函数来确定,而重构维数也可根据混沌吸引子的关联维来确定,仿真和特征参数计算均表明Buck变换器的重构混沌吸引子与原混沌吸引子拓扑等价,具有相同的动力学性质和几何性质,另外,构建了一个延迟重构实验电路,得到的实验波形也验证了上述结果。 相似文献
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研制了一种实用多路同步触发器。该装置体积小 ,调节方便 ,延时可调范围 0~ 10 0 ms,时延精度达 1μs,触发动作精度达 10μs。经实验证明其工作性能稳定、可靠 相似文献
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The dynamics of third-order chaotic circuit with threshold controller as a nonlinear element is reported. The circuit and the preliminary result reported by Chithra et al. (J Comput Electron 16:883–889, 2017), are considered as a prototype by adding quasiperiodic force in the original circuit. This present work focuses attention on exhibiting all possible nonlinear dynamical phenomena (i.e., periodic motion, chaotic, strange nonchaotic and multi-scroll attractor) for a different set of circuit parametric values. The approach helps in proof-of-experimental concept to implement all possible complex dynamical behaviors from a single circuit. Further, we also place emphasis on numerical simulation and physical circuit realization on the breadboard. The existence of strange nonchaotic attractor is quantitatively confirmed by calculating \({ 0}{-}{} { 1}\) test and singular-continuous spectrum analysis. We then find this circuit has potential to produce multi-scroll strange nonchaotic attractor by increasing threshold values. The experimental results are identical to numerical simulations. 相似文献
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针对通信的安全可靠问题,探讨了利用混沌进行保密通信的可行性。根据Pecora和Carroll提出的驱动一响应同步方法,分析了蔡氏混沌电路的同步原理,设计了混沌掩盖通信的实验电路,给出了元件参数和波形。实验结果表明:当f≥8kHz时,输入方渡信号被掩盖传输,实现了混沌保密通信。 相似文献
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Simin Yu Wallace K. S. Tang Jinhu Lü Guanrong Chen 《International Journal of Circuit Theory and Applications》2010,38(3):243-258
In this paper, the existence of 2n‐wing chaotic attractors in a family of Lorenz‐like systems is confirmed by both numerical simulation and circuit realization. By replacing a nonlinear cross‐product or square term in an original Lorenz‐like system with a newly designed multi‐segment quadratic function, multi‐wing attractor can be generated. The main design idea is to increase the number of index‐2 equilibrium points of the system. This approach can not only generate multi‐wing attractors in different Lorenz‐like systems, but can also allow the flexibility in specifying a precise number of wings to be created. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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变型蔡氏电路的混沌保密通信 总被引:1,自引:0,他引:1
为了产生更复杂的混沌系统,使通信更安全可靠,设计了一种产生丰富混沌行为的变型蔡氏电路,并进行了理论分析和计算机仿真.在此基础上根据驱动-响应同步原理设计了混沌保密通信电路,以方波作为输入信号进行了相应的硬件实验研究,给出了通信系统中各元件的参数和各部分的波形.结果表明:电路实验结果与计算机模拟结果完全符合,并且在响应电路和驱动电路的元件参数一致,其相对误差小于1%的条件下,当输入方波信号频率在约8 kHz~9 MHz时,该变型蔡氏电路的混沌保密通信系统可以实现保密通信. 相似文献
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针对一类混沌系统同步控制问题,利用脉冲微分方程的稳定理论,研究了传榆信号具有时间延迟的混沌系统脉冲同步问题,给出了两个混沌系统实现全局渐进同步的判据方法。该方法仅采用具有时间延迟的驱动系统与响应系统输出偏差的线性反馈作为脉冲控制信号,驱动两个混沌系统达到全局渐进同步,且适用于绝大多数混沌系统的同步控制。所设计的控制器结构简单,收敛速度快,易于实现。Roessler混沌系统的仿真实验进一步验证了该方法的有效性和可行性。 相似文献
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Ramazan Yeniçeri Müştak E. Yalçın 《International Journal of Circuit Theory and Applications》2016,44(6):1263-1276
In this paper, the first generalization for time‐delay sampled‐data chaotic system in order to generate multi‐scroll attractor is introduced with its circuit implementation. An efficient delay‐line with binary priority encoding, parallel shifting, and binary decoding is also suggested and implemented to overcome the delay line realization drawback in such systems. The proposed system enhances the complexity of chaotic behavior by means of multi‐scroll feature and exemplifies the simplification of chaotic systems for better realizations. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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《International Journal of Circuit Theory and Applications》2017,45(11):1873-1884
It has been a common brief that the principle for generating multi‐wing attractor from a Lorenz‐like chaotic system is to construct an even symmetric function for the system. In this pursuit, research effort on exploring the possibility of using non‐even symmetric function is scant, if any. This paper attempts to reveal the intrinsic relation between such a system function and its generated multi‐wing attractor in a chaotic system. It will be shown that a rather simple asymmetric function applying to the Shimizu–Morioka system can indeed generate a multi‐wing butterfly chaotic attractor. Then, some basic properties, compound structure, bifurcation diagram, Lyapunov exponent spectrum, and dynamical analysis of the new chaotic system are investigated in detail. Finally, an electronic circuit is designed and its experimental results are presented, which well match the numerical simulation results, thereby verifying the feasibility of the new method. Copyright © 2017 John Wiley & Sons, Ltd. 相似文献
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Jiakun Zhao Kecun Zhang 《International Journal of Adaptive Control and Signal Processing》2010,24(8):675-686
This work investigates the adaptive function Q‐S synchronization of non‐identical chaotic systems with unknown parameters. The sufficient conditions for achieving Q‐S synchronization with a desired scaling function of two different chaotic systems (including different dimensional systems) are derived based on the Lyapunov stability theory. By the adaptive control technique, the control laws and the corresponding parameter update laws are proposed such that the Q‐S synchronization of non‐identical chaotic systems is to be achieved. Finally, four illustrative numerical simulations are also given to demonstrate the effectiveness of the proposed scheme. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献