A fixed-order, mixed-norm control synthesis method for discrete linear systems

This paper discusses a fixed-order mixed-norm control synthesis technique for discrete linear systems. The method allows the control system designer to combine the H/sub 2/, l/sub 1/ and H/sub /spl infin// norms of dissimilar transfer functions single constrained optimization problem. Any number or combination of constraints can be added to the problem, and the method constrains the norms directly without reliance on upper bounds to the norms. Results for a SISO aircraft example are presented which demonstrate the algorithm using an H/sub 2//l/sub 1/ and H/sub 2//l/sub 1//H/sub /spl infin// problem.