An Iterative Updating Method for Damped Gyroscopic Systems Year: 2010 Volume: 4 Issue: 7 838 - 846 Pages Authors: Yongxin Yuan Abstract: The problem of updating damped gyroscopic systems using measured modal data can be mathematically formulated as following two problems. Problem I: Given Ma ∈ Rn×n, Λ = diag{λ1, ··· , λp} ∈ Cp×p, X = [x1, ··· , xp] ∈ Cn×p, where p Keywords: Model updating iterative algorithm gyroscopic system partially prescribed spectral data optimal approximation.