| Abstract: | A framework is developed for the general nonlinear H∞ output feedback control problem, in which two major restrictions are relaxed, i.e., the non-singular penalty in H∞ cost and the positive definite solution of Hamilton–Jacobi inequality at present state space nonlinear H∞ control literatures. As illustrated in an example, positive semidefinite solution simplifies the structure of the H∞ controller. Based on this framework, some sufficient conditions are derived. While specialized to linear systems, the controller reduces to the so-called central controller. © 1997 by John Wiley & Sons, Ltd. |
