An iterative solution to dynamic output stabilization and comments on "dynamic output feedback controller design for fuzzy systems".

In this note, we will show that the output feedback controller gains K in the paper is only an approximated solution K* = QP(-1)C0(dagger), with the dagger denoting Moore-Penrose inverse of the matrix C0. Consequently K is not equal to K* and therefore it may not satisfy the linear matrix inequality (LMI) constraints in the aforementioned paper. Instead, an iterative LMI approach is suggested to solve the dynamic output stabilization problem for the fuzzy systems.