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Adaptive set-point tracking of the Lorenz chaotic system using non-linear feedback

机译:基于非线性反馈的Lorenz混沌系统的自适应设定点跟踪

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摘要

In this paper, an adaptive control method for set-point tracking of the Lorenz chaotic system by using non-linear feedback is proposed. The design procedure of the proposed controller is accomplished in two steps. At the first step, using Lyapunov’s direct method, a non-linear state feedback is selected so that without any need to apply identification techniques, in despite of the uncertain parameters existence in the system state equations, the asymptotic stability of the general Lorenz system is guaranteed in a stochastic point of the manifold containing general system equilibrium points. At the second step, a linear state feedback with adaptive gain is added to the prior controller to eliminate the tracking error. In order to guarantee the system asymptotic stability at desired set-point, the indirect Lyapunov’s method is used. Finally, to show the effectiveness of the proposed methodology, the simulation results of different experiments including system parameters changes and set-point variation are provided.
机译:提出了一种利用非线性反馈的洛伦兹混沌系统设定点跟踪的自适应控制方法。所提出的控制器的设计过程分两步完成。第一步,使用Lyapunov的直接方法,选择非线性状态反馈,因此,尽管系统状态方程中存在不确定的参数,但一般的Lorenz系统的渐近稳定性是不需要应用识别技术的。保证在包含一般系统平衡点的歧管的随机点中。在第二步,将具有自适应增益的线性状态反馈添加到先前的控制器中,以消除跟踪误差。为了确保系统在所需设定点上的渐近稳定性,使用了间接Lyapunov方法。最后,为了展示所提出方法的有效性,提供了包括系统参数变化和设定点变化在内的不同实验的仿真结果。

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