摘要：This paper extends the unknown control coefficients with lower and upper constant bounds to the ones which may take arbitrarily large and /or small *** the existing methods are no longer applicable and the technical obstacles caused by the extensions are essential,new control design scheme should be exploited to the global practical *** the approaches of Nussbaum-gain and adding a power integrator,the authors successfully propose the design scheme of the adaptive practical tracking controller for the *** is shown that the designed controller guarantees that all the closed-loop system states are bounded and the tracking error becomes prescribed arbitrarily small after a finite time.

摘要：通过状态反馈和自适应技术解决了一类不确定高阶随机非线性系统的全局镇定问题.尽管对于确定性系统的类似问题已有大量研究,但由于存在随机干扰的影响,研究该问题同样具有重要意义,并且,更难以找到合适的二次连续可微的控制李亚普诺夫函数.通过引入新的控制李亚普诺夫函数并利用增加幂积分的方法,成功地设计了自适应连续状态反馈控制器,使得原系统的状态在概率意义下全局渐近稳定,而其他闭环系统状态在概率意义下全局稳定.仿真算例验证了控制器设计方法的有效性.