混沌信号驱动实现螺旋波和时空混沌抑制  

Suppress Spiral and Spatiotemporal Chaos Using Chaotic Signal

作　　者：马军[1] 应和平[2] 李延龙[1] 李维学[1] 

机构地区：[1]兰州理工大学物理系,兰州730050 [2]浙江大学近代物理中心,杭州310027

出　　处：《郑州大学学报（理学版）》2006年第1期45-49,共5页Journal of Zhengzhou University:Natural Science Edition

基　　金：国家自然科学基金资助项目;编号90303010;10472039;甘肃省自然科学基金资助项目;编号3ZS042-B25-021

摘　　要：首次提出采用Logistic映射的混沌信号抑制螺旋波.应用该方案对2个模型包括Fitzhugh-Nagumo和Pan-filov系统进行了研究.数值计算结果表明:在无噪声下,微弱的混沌信号驱动可以很快控制系统到达均匀稳定态;在时空噪声下,可以观测到螺旋波的破裂和丰富的斑图.该结果不同于噪声驱动下的螺旋波动态行为.Chaotic signals from Logistic map in different amplitudes and intensity are used to sup press spiral of active media successfully. Fitzhugh-Nagumo （FHN） and Panfilov equations are studied. The reason why chaotic behavior overcomes the behaviors of spiral is considered when chaotic signal is input into the system. The numerical simulation results prove that the anti-control scheme is effective. The interesting point is that system becomes homogeneous quickly and keeps invariable even when the chaotic driving signal is terminated in about 50 time units later.Our results show that chaotic signal driving is different from noise-induced spiral as the chaotic signal differs from noise greatly.

关 键 词：混沌反控制 螺旋波 LOGISTIC映射 混沌信号 Fitzhugh—Nagumo模型 Panfilov模型 

分 类 号：O415.5[理学—理论物理]