The ssi algorithm module

This module provides a comprehensive implementation of the Stochastic Subspace Identification (SSI) algorithm family for modal analysis and system identification [BPDG99], [MiDo11], [MDM16]. It supports both single‐setup and multi‐setup experimental configurations, as well as input-output scenarios using OMAX (Operational Modal Analysis with eXogenous inputs). Both data‐driven and covariance‐driven algorithms are included, with optional uncertainty quantification for the modal parameters [DLM13].

Classes:

SSI

Implements the SSI algorithm for single setup experiments.

SSI_MS

Extends SSI for multi-setup experiments.

Important

Each class contains methods for executing the SSI algorithm, extracting modal parameters, plotting results, and additional utilities relevant to the specific SSI approach.

Note

Users should be familiar with the concepts of modal analysis and system identification to effectively use this module.

The SSI class

The SSI_MS class