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变型蔡氏电路中混沌控制的实验研究 总被引:5,自引:2,他引:3
将变型蔡氏电路与线性二阶电路相耦合.进行线性二阶电路对变型蔡氏电路非反馈混沌控制的实验研究.实验结果表明:变型蔡氏电路比蔡氏电路具有更强的鲁棒性,更易实现混沌控制. 相似文献
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重频条件下电容器充电电源谐振电路由于谐振电容剩余电压的存在从而产生异常振荡,进而引发开关过流导致电源故障。针对这一问题,在分析谐振电路工作原理基础上,提出了在每个充电周期结束后,通过控制电源自身的部分开关导通,从而释放谐振电容剩余电压的解决方法,不仅可以让谐振电路趋于稳定,还避免了添加泄放电路的缺点,其控制方法也简单通用。对800 V/6 A的充电电源进行了电路仿真和实验验证,仿真和实验结果均表明,本文提出的方法可以在充电周期结束后将谐振电容上的剩余电压迅速归零,谐振电流也趋于稳定,有效抑制了谐振电路的异常振荡,从而验证了方法的有效性和实用性。 相似文献
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介绍一种大功率半导体激光泵浦固体激光器(DPSSL)脉冲驱动电源的设计电路及其控制方法。根据半导体激光器的工作特性,采用前级电容充电电路与后级脉冲电流产生电路相结合的电路结构。由于LCC谐振电路具有软开关特性和抗负载短路、开路的能力,又能够实现对储能电容恒流充电的功能,因此其适合做为脉冲电源中储能电容的充电电路;后级脉冲电流产生电路选择大功率MOSFET做为主控器件,利用MOSFET饱和区的漏极电流可控性,通过栅极电压控制产生负载脉冲电流。控制部分采用模拟与数字相结合的控制方式,使脉冲电源控制更加灵活,引入脉冲电流指令给定积分器,可以更有效地控制脉冲电流上升过程,抑制电流过冲,提高控制精度,使脉冲驱动电源产生类似矩形波的大功率脉冲电流。搭建了脉冲功率为28 kW的实验平台,实验达到的指标:脉冲电流幅值80 A,脉冲电压350 V,脉冲宽度100 μs,重复频率100 Hz。 相似文献
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提出在高阶Jerk系统中产生多涡卷混沌吸引子的一种电路设计与实现新方法.根据高阶Jerk方程,构造了一组具有参数控制的阶跃函数序列,在此基础上设计了产生多涡卷混沌吸引子的高阶广义Jerk电路.用这种方法设计电路的一个主要特点是通用性强,基于一种广义的电路形式,通过双掷开关切换,可分别实现多涡卷四阶和五阶两种不同类型的高阶Jerk电路,并由联动开关控制产生涡卷的数量.给出了在四阶和五阶Jerk电路中产生多涡卷混沌吸引子的计算机模拟和硬件实验结果.
关键词:
高阶广义Jerk电路
阶跃函数序列
多涡卷混沌吸引子
电路实验 相似文献
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串联型能量回收电路从电路结构上保证了异常条件下脉冲功率系统中充电电源的安全,但恒流充电电源经回收电感向储能电容充电时会引起回收电路的振荡,不仅会造成充电电源输出过压和回收电感损耗增加,还会导致充电电压一致性明显变差等问题。在分析了回收电路振荡特性的基础上,提出了在回收电感两端并接旁路开关和双路充电输入的电路结构以及相应的充电控制方法,不仅可以抑制回路振荡从而提高充电一致性,还可以消除回收电感和旁路开关的不必要损耗且控制方法也简单通用。对包含有串接型回收电路的600 V/400 A充电系统进行了电路仿真和实验验证,实验结果表明:在600 V重频条件下,回收电路的改进方案可将储能电容电压的充电一致性偏差由10 V降低到2.6 V,对应的相对偏差由1.7%降低到0.5%以内。 相似文献
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基于波特图的频域近似方法,研究了分数阶Liu混沌系统,并设计了一种树形电路单元来实现分数阶Liu混沌系统,通过对2.7阶Liu混沌系统的电路仿真和实验,以及α=0.8—0.1(步长0.1)Liu混沌系统的电路仿真,验证了树形电路单元的有效性,证实分数阶Liu混沌系统中确实存在混沌现象,且存在混沌的最低阶数为0.3. 设计简单有效的线性反馈控制器,实现了分数阶Liu混沌系统的混沌控制.
关键词:
分数阶Liu系统
电路实验
混沌控制 相似文献
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In this paper, a practical equivalent circuit of an active flux-controlled memristor characterized by smooth piecewise-quadratic nonlinearity is designed and an experimental chaotic memristive circuit is implemented. The chaotic memristive circuit has an equilibrium set and its stability is dependent on the initial state of the memristor. The initial state-dependent and the circuit parameter-dependent dynamics of the chaotic memristive circuit are investigated via phase portraits, bifurcation diagrams and Lyapunov exponents. Both experimental and simulation results validate the proposed equivalent circuit realization of the active flux-controlled memristor. 相似文献
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The voltage-current relationship and equivalent circuit implementation of parallel flux-controlled memristive circuits 下载免费PDF全文
A flux-controlled memristor characterized by smooth cubic nonlinearity is taken as an example, upon which the voltage-current relationships (VCRs) between two parallel memristive circuits - a parallel memristor and capacitor circuit (the parallel MC circuit), and a parallel memristor and inductor circuit (the parallel ML circuit) - are investigated. The results indicate that the VCR between these two parallel memristive circuits is closely related to the circuit parameters, and the frequency and amplitude of the sinusoidal voltage stimulus. An equivalent circuit model of the memristor is built, upon which the circuit simulations and exper/mental measurements of both the parallel MC circuit and the parallel ML circuit are performed, and the results verify the theoretical analysis results. 相似文献
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蔡氏电路的研究与制作 总被引:1,自引:0,他引:1
在非线性电路中蔡氏电路是迄今为止产生复杂动力学行为的最为有效和较为简单的电路之一。从软件仿真和电路制作两个角度分别对蔡氏电路的特性进行了研究,讨论蔡氏电路的工作原理,分别用PSPICE和MATLAB软件仿真出蔡氏电路的相关特性,并制作出硬件电路,给出观察蔡氏电路周期1、周期2极限环及单涡卷和双涡卷混沌吸引子的实验结果,得出了与理论分析一致的结果。对进一步研究和设计专用混沌集成电路及混沌在保密通信中的应用具有积极的意义。 相似文献
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We introduce a programmable electronic circuit implementing the rich dynamics of CO2 laser models. The design and the implementation of the circuit are accomplished by using a programmable analog device, which permits an experimental characterization of the laser dynamics. The experimental results shown in the paper demonstrate that the circuit exhibits homoclinic chaos typical of CO2 laser with feedback modulation of cavity losses. Moreover, experimental results showing that noise regularizes the dynamical time scales of the system are reported. 相似文献
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混沌电路是大学物理实验课程中非线性系统教学内容的典型案例,为了提高学生对非线性实验内容的学习效率和自主学习能力,本文设计了一种基于NI-myDAQ数据采集器和LabVIEW软件平台的混沌电路实验系统.该系统可提高混沌参数微小变化的精密性,实时显示并记录不同参数下的混沌现象,能保存相图、时域图和数据.用该系统测量了蔡氏混沌电路,给出了一定参数下的混沌电路实测结果图,并和Multisim仿真结果比较.结果表明,实验系统测量结果与Multisim仿真结果相吻合. 相似文献
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提出了一种高压电源谐振升压倍压电路,该电路由LC谐振电路与整流电路组成。对该电路的工作模式和稳态输出特性进行了分析;建立了该电路的数学模型:以归一化的形式定量描述了稳态输出电压与电流的增益、短路特性和开路特性、输出纹波与电压降、以及器件上的电应力,并分析了电路品质因数、归一化频率和电容比对输出特性的影响;对该电路进行了仿真与实验研究,仿真结果与实验结果具有很好的一致性,验证了数学模型的正确性。与C-W电路的对比研究结果表明:所提出的电路具有输出电压稳定、输出纹波小、短路特性好以及响应速度快的优点,满足高压小电流的应用需求。 相似文献
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In this paper we have analyzed the time series obtained from an experimental realization of an inductorless version of Chua’s circuit. We have also compared the experimental results with the results emerging by analysis of the time series obtained by numerical simulations of the respective model equations. Lyapunov exponent spectra, the Kaplan-Yorke dimension and phase-space diagrams were used to show the similarities between theoretical and experimental results. We were able to identify the effects of the operational amplifier simulated inductor internal resistance on the Chua’s circuit dynamics. Decreasing internal resistance for decreasing current through the circuit was responsible for the observed bifurcation route. 相似文献
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Mapping equivalent approach to analysis and realization of memristor-based dynamical circuit 下载免费PDF全文
A novel mapping equivalent approach is proposed in this paper, which can be used for analyzing and realizing a memristor-based dynamical circuit equivalently by a nonlinear dynamical circuit with the same topologies and circuit parameters. A memristor-based chaotic circuit and the corresponding Chua’s chaotic circuit with two output differentiators are taken as examples to illustrate this approach. Equivalent dynamical analysis and realization of the memristor-based chaotic circuit are performed by using Chua’s chaotic circuit. The results indicate that the outputs of memristor-based chaotic circuit and the corresponding outputs of Chua’s chaotic circuit have identical dynamics. The proposed approach verified by numerical simulations and experimental observations is useful in designing and analyzing memristor-based dynamical circuits. 相似文献
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Dynamical characteristics of an HP memristor based on an equivalent circuit model in a chaotic oscillator 下载免费PDF全文
《中国物理 B》2015,(6)
To develop real world memristor application circuits,an equivalent circuit model which imitates memductance(memory conductance) of the HP memristor is presented.The equivalent circuit can be used for breadboard experiments for various application circuit designs of memristor.Based on memductance of the realistic HP memristor and Chua's circuit a new chaotic oscillator is designed.Some basic dynamical behaviors of the oscillator,including equilibrium set,Lyapunov exponent spectrum,and bifurcations with various circuit parameters are investigated theoretically and numerically.To confirm the correction of the proposed oscillator an analog circuit is designed using the proposed equivalent circuit model of an HP memristor,and the circuit simulations and the experimental results are given. 相似文献