Fast multi-order computation of system matrices in subspace-based system identification ☆

摘要: Subspace methods have proven to be efficient for the identification of linear time-invariant systems, especially applied mechanical , civil or aeronautical structures in operation conditions. Therein, system results are needed at multiple (over-specified) model orders order distinguish true structural modes from spurious using so-called stabilization diagrams. In this paper, new algorithms derived multi-order with subspace-based and closely related Eigensystem Realization Algorithm. It is shown that significantly faster than conventional use. They demonstrated on a large-scale structure.