Anderson, B. D.O.Mingori, D. L.2026-01-022026-01-020731-5090ORCID:/0000-0002-1493-4774/work/174739697https://hdl.handle.net/1885/733802809Linear quadratic control problems are considered where frequency-dependent weighting on the control is assumed. When high frequencies are weighted more heavily than low frequencies, two qualitative conclusions can be drawn: passband robustness is reduced and high-frequency robustness is improved. The result gives a theoretical underpinning to the use of frequency-dependent weighting when high-frequency uncertainty is present in the plant.5en198510.2514/3.199930022064631