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首頁> 外文期刊>Neural Computing and Applications >Synchronization of general chaotic systems using neural controllers with application to secure communication
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Synchronization of general chaotic systems using neural controllers with application to secure communication

機譯:使用神經(jīng)控制器同步一般混沌系統(tǒng)及其在安全通信中的應(yīng)用

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摘要

The main contribution of this paper is to propose a nonlinear robust controller to synchronize general chaotic systems, such that the controller does not need the information of the chaotic system’s model. Following this purpose, in this paper, two methods are proposed to synchronize general forms of chaotic systems with application in secure communication. The first method uses radial basis function neural network (RBFNN) as a controller. All the parameters of the RBFNN are derived and optimized via particle swarm optimization (PSO) algorithm and genetic algorithm (GA). In order to increase the robustness of the controller, in the second method, an integral term is added to the RBF neural network gives an integral RBFNN (IRBFNN). The coefficients of the integral term and the parameters of IRBFNN are also derived and optimized via PSO and GA. The proposed methods are applied to the famous Lorenz chaotic system for secure communication. The performance and control effort of the proposed methods are compared with the recently proposed PID controller optimized via GA. Simulation results show the superiority of the proposed methods in comparison to the recent one in improving synchronization while using smaller control effort.
機譯:本文的主要貢獻是提出了一種非線性魯棒控制器來同步一般的混沌系統(tǒng),從而使該控制器不需要混沌系統(tǒng)模型的信息。為此目的,本文提出了兩種方法來使混沌系統(tǒng)的一般形式與安全通信中的應(yīng)用同步。第一種方法使用徑向基函數(shù)神經(jīng)網(wǎng)絡(luò)(RBFNN)作為控制器。 RBFNN的所有參數(shù)都通過粒子群優(yōu)化(PSO)算法和遺傳算法(GA)導(dǎo)出和優(yōu)化。為了增加控制器的魯棒性,在第二種方法中,將一個積分項添加到RBF神經(jīng)網(wǎng)絡(luò),從而得到一個積分RBFNN(IRBFNN)。還通過PSO和GA推導(dǎo)并優(yōu)化了積分項的系數(shù)和IRBFNN的參數(shù)。所提出的方法被應(yīng)用于著名的Lorenz混沌系統(tǒng)進行安全通信。將所提出的方法的性能和控制效果與最近提出的通過遺傳算法優(yōu)化的PID控制器進行了比較。仿真結(jié)果表明,與最近的方法相比,所提出的方法在改善同步性的同時使用較小的控制工作量具有優(yōu)勢。

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