Giantleap contributed two presentations at the recently held VPPC2019 conference in Hanoi, Vietnam.
The first presentation (SINTEF and FESB) described the latest developments on ELFIS, the diagnostic method developed in Giantleap.
ELFIS (Electrochemical Low-Frequency Impedance Spectroscopy) is a technique based on relay feedback to measure a specific value of impedance in the EIS spectrum without dedicated equipment. The measured impedance is the low-frequency resistance (LFR), which is a good prognostic variable, i.e. it tracks well the state of wear of the stack.
The second presentation (UFC) illustrated a data-driven approach to prognostics, using an AutoRegressive Moving-Average (ARMA) model.