TY - GEN
T1 - A nonparametric fault isolation approach through hybrid novelty score
AU - Tuerhong, Gulanbaier
AU - Kim, Seoung Bum
PY - 2011
Y1 - 2011
N2 - Isolating the variable or set of variables responsible for an out-of-control signal is a challenging task in multivariate statistical process control. Several fault isolation approaches have been proposed. However, all assumed a multivariate normal distribution on the process data, an assumption that limits their applicability in many situations. In the present study we propose a nonparametric fault isolation approach based on a hybrid novelty score (HNS). A simulation study was conducted to examine the performance of our proposed HNS-based fault isolation approach, and its results were compared with both parametric and nonparametric T2 decomposition approaches. The performance of our approach was superior in the simulation to either parametric or nonparametric T2 decompositions. This was especially true in nonnormal situations.
AB - Isolating the variable or set of variables responsible for an out-of-control signal is a challenging task in multivariate statistical process control. Several fault isolation approaches have been proposed. However, all assumed a multivariate normal distribution on the process data, an assumption that limits their applicability in many situations. In the present study we propose a nonparametric fault isolation approach based on a hybrid novelty score (HNS). A simulation study was conducted to examine the performance of our proposed HNS-based fault isolation approach, and its results were compared with both parametric and nonparametric T2 decomposition approaches. The performance of our approach was superior in the simulation to either parametric or nonparametric T2 decompositions. This was especially true in nonnormal situations.
KW - Decomposition
KW - Fault-isolation
KW - Multivariate statistical process control
KW - Nonparametric
KW - Novelty score
UR - http://www.scopus.com/inward/record.url?scp=80052892844&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80052892844&partnerID=8YFLogxK
U2 - 10.1109/ISI.2011.5984094
DO - 10.1109/ISI.2011.5984094
M3 - Conference contribution
AN - SCOPUS:80052892844
SN - 9781457700828
T3 - Proceedings of 2011 IEEE International Conference on Intelligence and Security Informatics, ISI 2011
SP - 261
EP - 266
BT - Proceedings of 2011 IEEE International Conference on Intelligence and Security Informatics, ISI 2011
T2 - 2011 IEEE International Conference on Intelligence and Security Informatics, ISI 2011
Y2 - 10 July 2011 through 12 July 2011
ER -