An LMI method for output-feedback H/sub ∞/ control design for systems with real parameter uncertainty

A new method is proposed that enables the application of the LMI approach to robust state-feedback H/sub /spl infin// control in the design of a robust dynamic output-feedback H/sub /spl infin// controller for a class of linear, continuous time-invariant systems with real parameter uncertainty in the transfer function. The proposed design guarantees quadratic stability and a prescribed robust H/sub /spl infin// performance.