摘要
提出了混沌同步有限时间实现问题.应用全程滑模控制技术,选择指数型终端滑模趋近律来设计滑模控制器,以实现一类混沌系统的状态同步.该设计方案针对混沌系统的参数不确定性和外界扰动,引入模糊基函数网络,在线估计不确定性和外部扰动的界值.同时该方案消除了滑模控制的到达阶段,状态始终保持在滑模面上,并能在有限时间内趋近于原点.最后以Duffing系统为例研究验证同步策略的可行性和有效性.
The problem of finite-time synchronization for chaotic system is proposed.By applying the global sliding mode control technique and selecting the exponential fast terminal sliding mode reaching law,a global sliding mode controller is designed and applied to synchronization of a class of chaotic systems.Aimed at the chaotic system with parameter uncertainties and disturbance,fuzzy basis function network is introduced to on-line estimate the parameter bound.The design scheme eliminates the reaching phase of sliding mode control.The tracking error stays on the sliding mode surface and tends to zero in finite time.To verify the feasibility and effectivness of this control strategy,the synchronization for Duffing chaotic system is illustrated.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期6250-6257,共8页
Acta Physica Sinica
