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Abstract
Fixed order mixed-norm controllers for the F-18 aircraft are designed to minimize the effects of wind and sensor noise while following a normal acceleration command. The basic objective was to develop a controller of low order that provides good wind and noise response while exhibiting robust performance in terms of command-following in the face of changing flight conditions. Controllers were designed using single norm methods as well as mixed H2/H∞ control with single and multiple constraints and mixed H2/μ. optimization. Comparisons illustrate the advantages of mixed H2/μ optimization with respect to noise response and controller order while guaranteeing robust performance.