Structural health monitoring and damage identification paper
Parker, A & Tran, D 2014, 'Application of independent component analysis in vibration', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 1115-1120. ISBN: 9780994152008.
This paper investigates the application of Independent Component Analysis (ICA) in vibration of structures to infer excitation forces from vibration response signals only. First, fundamental notions of ICA, statistical independence (SI) of variables and an ICA algorithm for real number, fastICA, were reviewed. The performance of ICA was assessed using harmonic force excitation as source signals and mixture signals are displacement responses from finite element simulation of vibration of a cantilever beam. It was found that fastICA could extract source signals that share most dynamic characteristics of the excitation source signals. Further studies are proposed to tailor ICA better to vibration signals.