A novel anti-disturbance strategy for a class of uncertain systems is investigated. Besides the unknown frequency sinusoidal, the controlled plant is subjected to bounded noise and unknown nonlinear term simultaneously. Through the construction of auxiliary observer, the sinusoidal is represented in a parametric uncertainty form. Only one unknown scalar needs estimating to construct compensation signal, meanwhile the unwanted nonlinear operation between frequency and equivalent disturbance can be removed. By integrating a feedback control law, all the unexpected dynamics can be rejected and attenuated respectively, where the conditions on the stability and optimal performance are also provided. Finally, a computer simulation example is presented to illustrate the effectiveness and the applicability of the suggested method.

研究了一种针对一类不确定系统的新型抗干扰策略。除了未知频率正弦波之外，受控对象同时受到有界噪声和未知非线性项的影响。通过辅助观测器的构建，正弦曲线以参数不确定性形式表示。只需要估计一个未知标量来构建补偿信号，同时可以去除频率和等效扰动之间不需要的非线性操作。通过集成反馈控制律，可以分别拒绝和衰减所有意想不到的动态，其中还提供了稳定性和最佳性能的条件。最后，给出了一个计算机仿真实例来说明所建议方法的有效性和适用性。