Fast Computation of the Multivariable Stability Margin for Real Interrelated Uncertain Parameters

A new algorithm for computing the Miutivariable Stability Margin for checking the robust stability of feedback systems with real parametric uncertainty is proposed. This method eliminates the need for the frequency search involved in the algorithm of [1,2,3] by reducing it to checking a finite number of conditions. These conditions have a special structure, which allows a significant improvement on the speed of computations.