Hoo-Optimization Via Output Feedback

This paper presents a simple and noniterative procedure for the computation of the exact value of the infimum in the standard Roo.optimal control with output feedback. The problem formulation is general and does not place any restrictions on the direct feedthrough terms between the control input and the controlled output variables, and between the disturbance input and the measurement output variables. The method is applicable to systems that satisfy 1) the transfer function from the control input to the controlled output is right-invertible and has no invariant zeros on the jUJ axis and, 2) the transfer function from the disturbance to the measurement output is left-invertible and has no invariant zeros on the jUJ axis.