Liu, YiAnderson, Brian D.O.Ly, Uy Loi2026-01-022026-01-020005-1098ORCID:/0000-0002-1493-4774/work/174739698https://hdl.handle.net/1885/733802795This paper introduces a frequency-weighted controller reduction scheme which offers good closed-loop stability under use of the reduced order controller. By combining the use of a stable fractional representation of the controller with a frequency weighting in the reduction procedure derived by consideration of the closed-loop stability margin, we formulate a frequency-weighted controller reduction procedure with the weight simplified by the Bezout identity. Some examples are used to illustrate the reduction procedure.enApproximation theorycontrollerslinear optimal regulatorlinear systemsmodel reductionsystem order reduction199010.1016/0005-1098(90)90118-20025398447