晶闸管混沌行为的延迟反馈控制与尖峰电流抑制  

Stabilization of chaotic behaviour and spiking current in thyristor with time-delayed feedback control

作　　者：谭平安[1] 张波[1] 丘东元[1] 

机构地区：[1]华南理工大学电力学院

出　　处：《物理学报》2010年第8期5299-5306,共8页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:50937001);国家高技术研究发展计划(批准号:2007AA05Z229)资助的课题~~

摘　　要：应用延迟反馈控制法(time-delayed feedback control,TDFC),有效地控制了晶闸管中出现的混沌行为,由此提出一种基于Floquet定理的延迟反馈控制法的优化设计方法.为进一步抑制延迟反馈控制出现的尖峰电流现象,根据相空间压缩原理对反馈信号进行相空间压缩,从而很好地抑制尖峰电流.A new method is proposed for the stabilization of spatio temporal chaos in a thyristor device. The valid control of unstable periodic orbits （UPOs） of the chaotic system is achieved by combining time-delayed feedback control （ TDFC） with the use of phase space compression. Based on the stability theory of linear periodic system,the linear stability analysis of the controlled system is discussed by using the Floquet＇s theorem,and the feedback gain of TDFC was optimized through the Floquet exponents. The results show that the spatio temporally unstable periodic orbits embedded in a chaotic attractor of the spatially extended system can be stabilized by using the proposed method,and the spiking current filaments can also be inhibited well.

关 键 词：晶闸管 混沌 延迟反馈控制 相空间压缩 

分 类 号：O415.5[理学—理论物理]