Comments on "Robust stabilization of a class of uncertain nonlinear systems via fuzzy control: quadratic stabilizability, H/sup /spl infin// control theory, and linear matrix inequalities"

The authors state that in the above paper (Tanaka et al., 1996), the derived stability analysis cannot guarantee the norm requirement for necessity and the selection of the G matrix can affect the stability analysis. Therefore, the derived stability analysis cannot avoid conservative results. They illustrate this fact using a simple example and propose a modified stability theorem.