Subspace methods have proven to be efficient for the identification of linear time-invariant
systems, especially applied to mechanical, civil or aeronautical structures in operation
conditions. Therein, system identification results are needed at multiple (over-specified)
model orders in order to distinguish the true structural modes from spurious modes using the
so-called stabilization diagrams. In this paper, new efficient algorithms are derived for this
multi-order system identification with subspace-based identification algorithms and the …