基于高阶高增益滑模观测器的混沌同步研究

Higher-order High-gain Sliding Mode Observer Based on Chaos Synchronization

基于驱动响应结构,针对一类混沌系统,提出了一种高阶高增益响应系统的设计方法。基于增维的思想,所提出的响应系统不仅能估计出系统的状态,还能估计出状态的微分。基于混沌同步,考虑了该类混沌系统的基于混沌同步的保密机制,在发射器和接受器达到同步的前提下,提出了一种新的信号还原的方法。该方法没有用到系统的微分信息,同时对强时变信号可以还原。针对一个SQCF混沌系统进行仿真实验,结果表明了方法的有效性。

Within the drive-response configuration, this paper develops a higher-order high-gain sliding mode observer used as response system for a class of chaotic system. By the technique of augmenting the dimension of original system, the proposed response system is able to estimate not only the drive system＇s states themselves but also their derivatives. Based on chaotic synchronization, the chaos-based secure communication mechanism is considered. A new signal recovery method is proposed after the receiver has been synchronized by the transmitter. Our method is able to recover strong-time-varying signals without using any differential information of the drive system. The SQCF chaotic system is considered as an illustrative example to demonstrate the effectiveness of the proposed approaches.