Sultana, Robert-Gabriel (Univerity of West Attica, Department of Industrial Design and Pr), Dimogianopoulos, Dimitrios (University of West Attica)

Contact-Less Sensing and Fault Detection/Localization in Long Flexible Cantilever Beams via Magnetoelastic Film Integration and AR model-based Methodology

Scheduled for presentation during the Regular Session "Nonlinear systems, Localization and FDI " (FrA2), Friday, November 18, 2022, 09:00−09:20, ROOM - E 210

16th European Workshop on Advanced Control and Diagnosis, November 16-18, 2022, Nancy, France

This information is tentative and subject to change. Compiled on April 19, 2024

Abstract

The integration of magnetoelastic film into a long, flexible polymer beam for obtaining sensing and fault diagnosis capabilities is investigated. Metglas(R) 2826MB film is attached onto the clamped end of the beam (itself fixed as cantilever), with its free end connected to a mini-exciter. Vibrating the structure causes emission of variable magnetic flux by the integrated magnetoelastic film, intercepted in a contact-less manner by a low-cost reception coil suspended above the film. The resulting voltage is linked to the beam's vibratory motion and is recordable via conventional oscilloscopes without sophisticated/dedicated circuitry (e.g. power-amplifiers), making for a cost-efficient and low-complexity setup. Hence, the long, flexible beam may act as a sensing device with contact-less data transmission. The innovation is that different structural faults (represented by loads of various magnitudes and locations on the beam) are shown to affect accordingly the recorded signal's spectral characteristics. Furthermore, fault-induced frequency shifts and changed damping can be reliably estimated and traced back to specific faults via the currently proposed stochastic model-based algorithmic methodology. Tests involving two different loads applied on three distinct positions on the beam successfully conclude on the proposed setup's potential for vibration sensing and detection/localization of different faults (loads) on the beam.