@article {PALACIOS201510,
	title = {Sequential pattern mining applied to aeroengine condition monitoring with uncertain health data},
	journal = {Engineering Applications of Artificial Intelligence},
	volume = {44},
	year = {2015},
	pages = {10 - 24},
	abstract = {Numerical algorithms that can assess Engine Health Monitoring (EHM) data in aeroengines are influenced by the high level of uncertainty inherent to gas path measurements and engine-to-engine variability. Among them, fuzzy rule-based techniques have been successfully used due to their robustness towards noisy signals and their capability to learn human-readable rules from data. These techniques are useful in detecting the presence of certain types of abnormal events or general engine deterioration, through the identification of specific combinations of EHM signals associated with these specific cases. However, there are also other types of engine events that manifest themselves as an ordered sequence of otherwise normal combinations of the EHM signals. These combinations are dismissed when considered in isolation as the current existing techniques cannot assess them. In this paper it is proposed to use sequence mining techniques in order to obtain fuzzy rules from uncertain EHM data which can in turn be used to identify the cases where an engine event is determined as a sequence of otherwise normal combinations of EHM signals. The results are subsequently tested on a representative sample of aeroengine data.},
	keywords = {engine health monitoring, Fuzzy rule-based systems, Fuzzy sequence mining, Uncertain data},
	issn = {0952-1976},
	doi = {https://doi.org/10.1016/j.engappai.2015.05.003},
	url = {http://www.sciencedirect.com/science/article/pii/S0952197615001062},
	author = {Ana Palacios and Alvaro Mart{\'\i}nez and Luciano S{\'a}nchez and In{\'e}s Couso}
}
@conference {6622420,
	title = {Engine Health Monitoring for engine fleets using fuzzy radviz},
	booktitle = {2013 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)},
	year = {2013},
	month = {July},
	pages = {1-8},
	abstract = {A new algorithm for assessment of Engine Health Monitoring (EHM) data in aircraft is proposed. The diagnostic tool quantifies step changes, shifts and trends in EHM data by means of a transformation that aggregates concurrent readings of EHM data into a single fuzzy state. A Genetic Fuzzy System is used to detect the occurance of a specific trend of interest in the sequence of states. The activation of the rules is represented in a 2D map by means of an extension of the Radviz visualization algorithm to fuzzy data.},
	keywords = {2D map, aerospace engineering, aerospace engines, aircraft, Bandwidth, condition monitoring, data visualisation, diagnostic tool, EHM data, engine fleets, engine health monitoring, Engines, fault diagnosis, fuzzy data, fuzzy Radviz, fuzzy set theory, genetic algorithms, genetic fuzzy system, Genetic Fuzzy Systems, Low Quality Data, Maintenance engineering, Market research, mechanical engineering computing, Monitoring, Radviz visualization algorithm, rule activation, single fuzzy state, states sequence, Temperature measurement, Turbines},
	issn = {1098-7584},
	doi = {10.1109/FUZZ-IEEE.2013.6622420},
	author = {A. Mart{\'\i}nez and L. S{\'a}nchez and I. Couso}
}
