Journal of Applied Reliability (한국신뢰성학회지:신뢰성응용연구)
- Volume 14 Issue 4
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- Pages.208-212
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- 2014
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- 1738-9895(pISSN)
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- 2733-8320(eISSN)
A Study on Crack Fault Diagnosis of Wind Turbine Simulation System
풍력발전기 모사 시스템에서의 균열 결함 진단에 대한 연구
- Bae, Keun-Ho (Systems Engineering Research Division, Korea Institute of Machinery & Materials) ;
- Park, Jong-Won (Systems Engineering Research Division, Korea Institute of Machinery & Materials) ;
- Kim, Bong-Ki (Acoustics Group, Korea Institute of Machinery & Materials) ;
- Choi, Byung-Oh (Systems Engineering Research Division, Korea Institute of Machinery & Materials)
- Received : 2014.08.17
- Accepted : 2014.10.25
- Published : 2014.12.25
Abstract
An experimental gear-box was set-up to simulate the real situation of the wind-turbine. Artificial cracks of different sizes were machined into the gear. Vibration signals were acquired to diagnose the different crack fault conditions. Time-domain features such as root mean square, variance, kurtosis, normalized 6th central moments were used to capture the characteristics of different crack conditions. Normal condition, 1 mm crack condition, 2mm crack condition, 6mm crack condition, and tooth fault condition were compared using ANFIS and DAG-SVM methods, and three different DAG-SVM models were compared. High-pass filtering improved the success rates remarkably in the case of DAG-SVM.