上一篇博客里我们分析了文献[1]证明积分形式系统扩张状态观测器(ESO)收敛性的套路(以下称博客1),并且指出收敛性分析依赖于假设Lyapunov函数存在且满足一定条件(即假设3),这个假设随后在文献[1]中进一步放宽如下:

参考文献

[1]Guo B Z, Zhao Z. On the convergence of an extended state observer for nonlinear systems with uncertainty[J]. Systems & Control Letters, 2011, 60(6): 420-430.

[2]Zhao Z L, Guo B Z. Extended state observer for uncertain lower triangular nonlinear systems[J]. Systems & Control Letters, 2015, 85: 100-108.

[3]Khalil H K. Nonlinear systems[M]. Prentice-Hall, 2001.