A robust fault isolation method based on DTW
Fault Detection, Supervision and Safety of Technical Processes, Volume # 6 | Part# 1
Zheng Niu; Yuguang Niu; Yurong Li; Jizhen Liu
Digital Object Identifier (DOI)
fault isolation,dynamic time warping,comparability measure,robustness
The precise mathematical model of industrial process is difficult to be obtained, so a fault isolation method independent of process mathematical model is proposed. This method is based on dynamic time warping (DTW) technology and isolates process fault by process data analysis . First, the fault pattern storehouse is established through history data analysis and process knowledge. Then the detection sample is carried on pattern matching with each fault sample in fault pattern storehouse by DTW. Finally, the matching results are quantitatively evaluated to isolate fault through comparability measure. The simulation result of three-tank-system indicates that this method has good robustness to the process time -varying characteristic, thus has high fault isolation precision.
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