This example file shows mode shapes identifcation using independent component analysis (ICA) of 2DOF system subjected to impulse excitation. However it should be taken into account:
-The selected 2DOF system have orthogonal modes.
 Al Rumaithi, Ayad, "Characterization of Dynamic Structures Using Parametric and Non-parametric System Identification Methods" (2014). Electronic Theses and Dissertations. 1325.
 Al-Rumaithi, Ayad, Hae-Bum Yun, and Sami F. Masri. "A Comparative Study of Mode Decomposition to Relate Next-ERA, PCA, and ICA Modes." Model Validation and Uncertainty Quantification, Volume 3. Springer, Cham, 2015. 113-133.
Ayad Al-Rumaithi (2020). Mode Decomposition using Independent Component Analysis (https://www.mathworks.com/matlabcentral/fileexchange/71944-mode-decomposition-using-independent-component-analysis), MATLAB Central File Exchange. Retrieved .