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A synchronization method is proposed for a class of chaotic systems which can be translated into the strictfeedback form.This approach needs only a single controller and turns out to be globally exponentially asymptotically stable.The effectiveness of this approach has been demonstrated with the Rossler chaotic system. 相似文献
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研究了一类混沌系统的混沌同步,对此类混沌系统,通过设计一个合适标量控制器,可以实现系统的混沌同步.给出了该标量控制器设计的一般方法,并从理论上得到了混沌同步的充分和必要条件,且此充分和必要条件与混沌系统的性质无关.
关键词:
混沌系统
标量控制器
混沌同步 相似文献
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同时记录与高速事件相关的信息是进行胶片判读处理的必要条件,数据记录系统就是由高速摄影机的同步控制信号控制选通,将与事件相关的信息经特殊处理,由集成数据点阵头记录在胶片上,为此后的胶片判读及对拍摄事件进行更精细的分析处理提供定量、实时的依据。 相似文献
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基于DSP的磁场电源控制器软件设计 总被引:1,自引:1,他引:0
为了使兰州重离子加速器冷却储存环的磁场电源控制器及时更新输出的波形数据,以TI公司的TM320C6713芯片为中央处理器,结合FPGA逻辑编程,采用双FIFO数据缓存机制和Aitken插值算法,编写并优化了磁场电源控制器软件系统。利用数据驱动模式的编程方式提高了系统的执行效率和可维护性。同时通过对更新的波形数据做Aitken插值运算,使其大小减少为原始数据的1/1024,提高了数据的传输和存储效率。经现场测试,本软件系统运行稳定可行,达到设计要求。 相似文献
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A sliding mode adaptive synchronization controller is presented with a neural network of radial basis function (RBF) for two chaotic systems. The uncertainty of the synchronization error system is approximated by the RBF neural network. The synchronization controller is given based on the output of the RBF neural network. The proposed controller can make the synchronization error convergent to zero in 5s and can overcome disruption of the uncertainty of the system and the exterior disturbance. Finally, an example is given to illustrate the effectiveness of the proposed synchronization control method. 相似文献
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Fault tolerant synchronization of chaotic systems based on T-S fuzzy model with fuzzy sampled-data controller 下载免费PDF全文
In this paper the fault tolerant synchronization of two chaotic systems based on fuzzy model and sample data is investigated.The problem of fault tolerant synchronization is formulated to study the global asymptotical stability of the error system with the fuzzy sampled-data controller which contains a state feedback controller and a fault compensator.The synchronization can be achieved no matter whether the fault occurs or not.To investigate the stability of the error system and facilitate the design of the fuzzy sampled-data controller,a Takagi-Sugeno(T-S) fuzzy model is employed to represent the chaotic system dynamics.To acquire good performance and produce a less conservative analysis result,a new parameter-dependent Lyapunov-Krasovksii functional and a relaxed stabilization technique are considered.The stability conditions based on linear matrix inequality are obtained to achieve the fault tolerant synchronization of the chaotic systems.Finally,a numerical simulation is shown to verify the results. 相似文献
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<正>This paper presents a robust output feedback control method for uncertain chaotic systems,which comprises a nonlinear inversion-based controller with a fuzzy robust compensator.The proposed controller eliminates the unknown nonlinear function by using a fuzzy system,whose inputs are not the state variables but feedback error signals.The underlying stability analysis as well as parameter update law design are carried out by using the Lyapunov-based technique.The proposed method indicates that the nonlinear inversion-based control approach can also be applied to uncertain chaotic systems.Theoretical results are illustrated through two simulation examples. 相似文献
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针对含有扰动的混沌系统, 设计采样同步控制器, 利用输入时滞法将含有采样同步控制器的混杂系统转换为具有输入时滞的连续系统. 并考虑对系统影响最坏的干扰程度, 在该种情况下, 基于线性矩阵不等式(LMI)技术和min-max鲁棒控制方法, 给出了使误差系统稳定的充分条件, 确保混沌系统在所容许的扰动下均能实现完全同步. 仿真结果说明所设计的采样同步控制方案具有很强的鲁棒性, 适合应用于保密通信系统中.
关键词:
混沌同步
采样控制
min-max方法
输入时滞 相似文献
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In this paper,the problem of generalised synchronisation of two different chaotic systems is investigated.Some less conservative conditions are derived using linear matrix inequality other than existing results.Furthermore,a simple adaptive control scheme is proposed to achieve the generalised synchronisation of chaotic systems.The proposed method is simple and easy to implement in practice and can be applied to secure communications.Numerical simulations are also given to demonstrate the effectiveness and feasibility of the theoretical analysis. 相似文献
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Stochastic asymptotical synchronization of chaotic Markovian jumping fuzzy cellular neural networks with mixed delays and the Wiener process based on sampled-data control 下载免费PDF全文
We investigate the stochastic asymptotical synchronization of chaotic Markovian jumping fuzzy cellular neural networks (MJFCNNs) with discrete, unbounded distributed delays, and the Wiener process based on sampled-data control using the linear matrix inequality (LMI) approach. The Lyapunov-Krasovskii functional combined with the input delay approach as well as the free-weighting matrix approach is employed to derive several sufficient criteria in terms of LMIs to ensure that the delayed MJFCNNs with the Wiener process is stochastic asymptotical synchronous. Restrictions (e.g., time derivative is smaller than one) are removed to obtain a proposed sampled-data controller. Finally, a numerical example is provided to demonstrate the reliability of the derived results. 相似文献
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H.K. Lam 《Physics letters. A》2010,374(4):552-556
This Letter presents the chaos synchronization of two discrete-time generalized Hénon map, namely the drive and response systems. A polynomial controller is proposed to drive the system states of the response system to follow those of the drive system. The system stability of the error system formed by the drive and response systems and the synthesis of the polynomial controller are investigated using the sum-of-squares (SOS) technique. Based on the Lyapunov stability theory, stability conditions in terms of SOS are derived to guarantee the system stability and facilitate the controller synthesis. By satisfying the SOS-based stability conditions, chaotic synchronization is achieved. The solution of the SOS-based stability conditions can be found numerically using the third-party Matlab toolbox SOSTOOLS. A simulation example is given to illustrate the merits of the proposed polynomial control approach. 相似文献
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This paper presents a new compound synchronisation scheme among four hyperchaotic memristor system with incommensurate fractional-order derivatives. First a new controller was designed based on adaptive technique to minimise the errors and guarantee compound synchronisation of four fractional-order memristor chaotic systems. According to the suitability of compound synchronisation as a reliable solution for secure communication, we then examined the application of the proposed adaptive compound synchronisation scheme in the presence of noise for secure communication. In addition, the unpredictability and complexity of the drive systems enhance the security of secure communication. The corresponding theoretical analysis and results of simulation validated the effectiveness of the proposed synchronisation scheme using MATLAB. 相似文献
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