2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/160789This paper considers the robust ${\cal D}$-stability margin problem under polynomic structured real parametric uncertainty. Based on the work of De Gaston and Safonov (1988), we have developed techniques such as, a parallel frequency sweeping strategy, different domain splitting schemes, which significantly reduce the computational complexity and guarantee the convergence.27 pages, 14 figuresOptimization and ControlDynamical Systemstext