Nonlinear Sciences – Adaptation and Self-Organizing Systems
Scientific paper
2006-12-30
Nonlinear Sciences
Adaptation and Self-Organizing Systems
8 Figures
Scientific paper
10.1103/PhysRevE.75.066212
In the paper, several concrete examples, as well as their numerical simulations, are given to show that parameter identification based on the so-called adaptive synchronization techniques might be failed if those functions with parameters pending for identification in coupled systems are designed to be mutually linearly dependent or approximately linearly dependent on the orbit in the synchronization manifold. This failure might be emergent not only when the synchronized orbit is selected to be some sort of equilibrium or some sort of periodic oscillation, but also when it is taken as some type of chaotic attractor produced by driving system. This result implies that chaotic property of driving signal is not necessary to achievement of parameter identification. The mechanism inducing such a failure, as well as the bounded property of all trajectories generated by coupled systems, is theoretically expatiated. New synchronization techniques are proposed to rigorously realize the complete synchronization and parameter identification in a class of systems where the nonlinearity is not globally Lipschitz. In addition, parameter identification are discussed for systems with time delay.
Lin Wei
Ma Huan-fei
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