μ-analysis of a beam figure control system

We have performed robust stability/performance μ-analysis for a beam figure control system to check if the pre-designed SVD-control met design specifications for any possible damping factor within a specified range. Such an elaborate technique was used due to failure of robustness analysis with unstructured uncertainty model. However, even the μ-analysis/coprime factorization couldn´t utilize 100% of the highly structured uncertainty description, provided by the original beam model. Hence, some misleading robust performance problems were indicated, despite the fact that study of all possible damping factor scenario proved there should be no problem