On observer-based controller design for Sugeno systems with unmeasurable premise variables.

This paper considers the design of observer-based controller for a class of continuous-time nonlinear systems presented by Takagi-Sugeno (T-S) model with unmeasurable premise variables. This T-S structure can represent a larger class of nonlinear systems as compared to the measurable premise variable case but its analysis is more complicated. To reduce the design complexity, a common output model for subsystems is employed by the use of local nonlinear rules.