【摘要】 通过在Yang系统中添加具有忆阻器性质的项及其他非线性项,提出了一种忆阻混沌系统。改变该系统的参数及状态变量的初值可得到单涡卷、双涡卷和三涡卷的混沌吸引子。以三涡卷时的系统为例,分析了其动力学特性,研究了该系统与加入了干扰信号的Chen系统的广义同步。应用滑模控制方法设计了同步控制器及参数自适应律,并基于Lyapunov稳定性理论得出了实现同步的充分条件,最后将所提出的同步方法与没有引入滑模控制的方法进行了比较。结果表明两个系统实现了同步,参数得到了准确的估计,且该方法比没有引入滑模控制的方法同步速度更快,抗干扰能力更强。更多还原

【Abstract】 A memristive chaotic system is proposed by adding terms with properties of memristor and other nonlinear terms to Yang system. The chaotic attractors with single scroll, double scrolls and triple scrolls can be obtained by changing the parameters and initial values of state variables of the system.The dynamic characteristics of the system are analyzed, and the generalized synchronization between the memristive chaotic system and Chen system with disturbance is investigated by taking a triple-scroll system as an example. The synchronization controller and parameter adaptive law are designed by employing sliding mode control method, and the sufficient conditions for synchronization are obtained by using Lyapunov stability theory. Finally, the proposed synchronization method is compared with the method without sliding mode control. Results show that the two systems are synchronized and the parameters are accurately estimated. The proposed method is faster in synchronization speed than the method without sliding mode control, and has better anti-interference ability as well.更多还原