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机构地区:[1]南京航空航天大学自动化学院,南京210016 [2]南京森林警察学院,南京210042
出 处:《电光与控制》2011年第5期37-41,共5页Electronics Optics & Control
基 金:国家自然科学基金(90716028)资助项目;江苏省自然科学基金(SBK2008390);南航基本科研业务经费(NS2010060)资助项目
摘 要:为了研究具有不同参数的两个不确定时滞混沌系统的同步与反同步控制及在保密通信中的应用,首先对反馈时滞Lorenz混沌系统的系统参数进行重新设计,并引入正弦函数扰动,获得两个具有不同吸引子的时滞混沌系统。采用主动控制方法实现了具有不同参数的时滞混沌系统的同步及反同步控制。为了实现保密通信,将明文信号参与混沌运算,并结合混沌信号设计多个密钥进行加密,在实现同步与反同步后,恢复出明文信号。仿真结果表明,在存在信道噪声情况下,同步控制比反同步控制鲁棒性强,应用在保密通信中能快速地恢复出明文信号。To study the synchronous and anti-synchronous control and their application in secure communication of uncertain delayed chaotic systems with different system parameters,the parameters of feedback delayed Lorenz chaotic system were redesigned and sine function was introduced as the disturbance,thus two different attractors of time-delay chaotic systems were obtained.An active control method was used to implement the synchronous and anti-synchronous control of the delayed chaotic systems with different structure.To realize secure communication,the original signal was involved in the chaotic signal,and multiple secrecy keys were designed to encrypt the chaotic signal,thus the original signal could be recovered after synchronization/anti-synchroization.The simulation results show that the synchronous control is more robust than anti-synchronous control when noise existed in channel.Therefore,the synchronous control can be used in secure communication for recovering the original signal more rapidly.
分 类 号:V271.4[航空宇航科学与技术—飞行器设计] TP301[自动化与计算机技术—计算机系统结构]
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