Savkin, Andrey V.Petersen, Ian R.2026-07-032026-07-030018-9286ORCID:/0000-0003-4856-9450/work/219177602https://hdl.handle.net/1885/733812549This paper considers the problem of robustly stabilizing an uncertain system via fixed-order output feedback control. This problem is considered by defining a notion of robust stabilizability with a quadratic storage function. This notion is closely related to the notion of quadratic stabilizability. The main result of the paper shows that if an uncertain system is robustly stabilizable with a quadratic storage function via a nonlinear time-varying controller, then it will also be robustly stabilizable with a quadratic storage function via a linear time-invariant controller of the same order.4en199610.1109/9.5365040030243655