Zhi-liang Zhao

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The extended state observer first proposed by Jingqing Han in [Control and Decision , 10(1)(1995), 85-88] is the key link toward the active disturbance rejection control that is taking off as a technology after numerous successful applications in engineering. Unfortunately, there is no a rigorous proof of convergence to date. In this paper, we attempt to(More)
—In this technical note, the weak convergence of a nonlinear high-gain tracking differentiator based on finite-time stable system is presented under some easy checkable conditions. An example is constructed by using homogeneity. Numerical simulation shows that this tracking dif-ferentiator takes advantages over the existing ones. This result relaxes the(More)
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