Comments on “Dynamic Sliding Mode Control Design for Nonlinear Systems Using Sliding Mode Observer"

This paper considers the work entitled “Dynamic Sliding Mode Control Design for Nonlinear Systems Using Sliding Mode Observer” that is published in Tabriz Journal of Electrical Engineering where the authors try to design a sliding mode control design with sliding mode observer for a class of nonlinear systems. In this paper, we first give a brief overview of the proposed approach of aforementioned paper to the observer design. For the convergence of the estimation error, there is a proposition that we will discuss the validity of its proof. Finally, with a change in dynamic error equations of observer, its stability is proven.