A Mode Tracking Method with Redundant-Mode-Eliminating Filters and Comprehensive Multicriteria

This paper presents an enhanced eigenvector-correlation-based mode tracking method with two core parts. In Part Ⅰ, two redundant-mode-eliminating filters eliminate numerous unexcitable modes and limit correlation computations to localized mode pairs, significantly reducing computational complexity. In Part II, a correlation classification and a multicriteria approach (including eigenvalue difference criteria, energy operator criteria, and least-squares trajectory fitting criteria) address mode swapping and degeneracy. This method ensures tracking accuracy, reduces time consumption, and is insensitive to mesh refinement and frequency step size, making it suitable for wideband tracking.