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For a network structure type of BA scale-free complex network, the state equation of nodes in network is described as Lorenz chaotic system. By constructing a Lyapunov function, it is proved that this network model can achieve synchronization under the adaptive control scheme. The control strategy is simple and available, it is easy for the future design of the engineering too. The simulation results...
In view of Chaos is such a complex nonlinear systems, we analyze the parameters of initial sensitivity and unpredictability, and use a universal adaptive controller based on adaptive control theory, combined with the stability of Lyaponov theory, making the system to eliminate chaos and asymptotic stability to the desired smooth orbit. Matlab simulation results have verified the efficiency of this...
The forward displacement analysis of parallel mechanism is attributed to find the solutions of complicated nonlinear equations and it is a very difficult process. Taking chaotic sequences as the initial values of Newton iterative method we can find all the solutions of equations quickly. Making use of existing chaos system and discovering new chaos system to generate chaotic sequences with good properties...
The amplitude and frequency of weak signal is usually detected in strong noise. And the detection method of frequency is less to be researched. In this paper we use Rossler chaotic oscillator and proportional differential control to detect the frequency of the weak signal. At first we control Rossler system to critical state from periodic state to chaotic state. Then the unknown signal is put to the...
Back propagation (BP) neural network has widely application because of its ability of self-studying, self-adapting and generalization. But there are some intrinsic defaults, such as low convergence speed, local extremes and so on. Artificial fish-swarm algorithm (AFSA) is an up-to-date proposed optimal strategy, which possesses good capability to avoid the local extremum and obtain the global extremum...
The displacement analysis problem of parallel robot mechanism can be finally transformed into solving nonlinear equations and the finding-process is very difficult. Moreover, the more CCS kinematic pair the more complexly to find. The mathematical programming method is adopted when the iteration diverges with the Newton and quasi-Newton methods. If chaotic sequences are considered as the initial guess...
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