Reconstruction of Cross-Modal Visual Features from Acoustic Pressure Time Series in Combustion Systems
In many cyber-physical systems, imaging can be an important but expensive or 'difficult to deploy' sensing modality. One such example is detecting combustion instability using flame images where deep learning frameworks have demonstrated high performance. The proposed frameworks are shown to be quite trustworthy such that domain experts can have sufficient confidence to use these models in real systems to prevent unwanted incidents. However, flame imaging is not a common sensing modality in combustion engines today. Therefore, the current roadblock exists on the hardware side regarding the acquisition and processing of high-volume flame images. On the other hand, the acoustic pressure time series is a more feasible modality for data collection in real combustors. To utilize acoustic time series as a sensing modality, we propose a novel model that can reconstruct cross-modal visual features from acoustic pressure time series in combustion systems. By providing the benefit of cross-modal reconstruction, this model can prove to be useful in different domains well beyond the power generation and transportation industries.
Committee: Jin Tian (major professor), Soumik Sarkar (major professor), and Samik Basu
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