共查询到19条相似文献,搜索用时 46 毫秒
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用两种不同的方法——主动控制同步法和自适应控制同步法实现超混沌Chen系统和超混沌Roessler系统的异结构同步,各自设计了不同的控制器,使得响应系统与驱动系统同步.当参数已知时,采用主动控制法,方法简单有效且不需要构造Lyapunov函数,实现同步的时间短;当系统参数未知或结构不确定时,基于Lyapunov稳定性理论,给出自适应同步控制器的系统设计过程和参数自适应律,使得系统达到同步同时识别未知参数,数值模拟验证了两种方法的有效性。 相似文献
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Based on the three-dimensional Liu system with a nonlinear term ofsquare, this paper appends a state variable to the system, andfurther adds a driving signal of the sine signal to construct anovel 4-demensional nonautonomous hyperchaotic Liu system. Theappended variable is formed by the product of the nonlinearquadratic term of the original state variables and the drivingsignal. Through adjusting the frequency of the driving signal, thesystem can be controlled to show some different dynamic behaviors.By numerical simulations, the Lyapunov exponent spectrums,bifurcation diagrams and phase diagrams of the novel systems areanalyzed. Furthermore, the corresponding hardware circuits areimplemented. Both the experimental results and the simulationresults confirm that the method is feasible. The method, whichadjusts the frequency of the input sine signal to control the systemto show different dynamic behaviors, can make the dynamic propertyof the system become more complex, but easier to be controlledaccurately as well. 相似文献
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Control of fractional chaotic and hyperchaotic systems based on a fractional order controller
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We present a new fractional-order controller based on the Lyapunov stability theory and propose a control method which can control fractional chaotic and hyperchaotic systems whether systems are commensurate or incommensurate.The proposed control method is universal, simple, and theoretically rigorous. Numerical simulations are given for several fractional chaotic and hyperchaotic systems to verify the effectiveness and the universality of the proposed control method. 相似文献
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通过仿真实验和传统实验比较,分析了仿真实验的优点,给出了虚拟仿真实验室的组成,结合我校使用的虚拟仿真实验教学系统,介绍了在物理实验教学过程中仿真实验的具体应用。 相似文献
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接触法复制全息图需要使母全息图与感光干板的乳胶面相向紧密接触,对母全息图进行透射照明,经冲洗处理后的曝光干板即为普通的全息图.采用低压钠灯为光源,对菲涅耳全息图进行复制实践,复制全息图的再现像清晰度比母全息图要差,但就像的质量而言层次很分明. 相似文献
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研究了基于响应量转换法测量浑浊介质中成分浓度方法的可行性,以Intralipid为研究对象,通过(monte carlo,MC)结合反向倍增法(inverse adding doubling,IAD)算法的模拟实验和双积分球系统结合IAD算法实验的方法,验证了IAD算法和双积分球系统提取散射信息的有效性,并进一步考察了... 相似文献