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Full-Text Articles in Engineering
Buckling Of Particle-Laden Interfaces, Theo Dias Kassuga
Buckling Of Particle-Laden Interfaces, Theo Dias Kassuga
Masters Theses
We study the buckling of an oil-water interface populated by micron-sized latex particles using a Langmuir trough. We extend pre-existing results to the micron-range with different capillary length and compare the experimental data to the existing theoretical framework. An unexpected trend for the dominant wavelength of buckling is observed, suggesting that there is a transition between regimes in the micron-range. A mechanism for the new regime is proposed. Cascading is reported, as well as novel kinds of transition between wavelengths within the same particle raft. Lastly, the effect of compression on the macroscopic arrangement of particles is investigated, as well …
Methods Of Engine Degradation Assessment In The Time-Scale Domain, Jeffrey Charles Simmons
Methods Of Engine Degradation Assessment In The Time-Scale Domain, Jeffrey Charles Simmons
Doctoral Dissertations
This dissertation addresses health monitoring of aircraft engines. Two methods are offered for engine degradation assessment: (1) a direct method to isolate degradation of engine components in-flight, and (2) an inverse method to quantify the level of degradations post-flight. The noted feature of the degradation isolation method is its independence from training, which makes it suitable for on-board implementation. The degradation quantification method, on the other hand, is a multi-output method of parameter estimation with the advantage of leveraging the shape attributes of model outputs. The representation of the shape attributes of the various time series, by continuous wavelet transforms …