一种时滞系统输出反馈自适应稳定的改进方法

An Improvement of Output Feedback Adaptive Stabilization for Time Delay System

针对一类含变时滞状态扰动不确定系统的输出反馈自适应稳定问题,已有的算法仅能保证闭环系统状态最终一致有界.提出了一种新的控制算法,通过在控制器中引入一正的一致连续有界函数并设计了一种新的自适应率对扰动参数进行在线估计,可以保证闭环系统的状态一致渐近趋于零.仿真结果验证了该算法的有效性.

As for the problem of output feedback adaptive stabilization for a class of uncertain dynamic system including time-varying delayed disturbance, the old algorithm only guaranteed the uniform ultimate boundedness of the closed-loop system. A new control algorithm was proposed. A positive uniformly continuous bounded function was introduced in the controller and a new adaptive law was designed to estimate the parameter of the disturbance on line, which could guarantee the state trajectory of the closed- loop system was uniformly and asymptotically to zero. The effectiveness of the algorithm was verified by the simulation results as well.