New motor development requires high-speed load testing using dynamo equipment to calculate the efficiency of the motor. Abnormal noise and vibration may occur in the test equipment rotating at high speed due to misalignment of the connecting shaft or looseness of the fixation, which may lead to safety accidents. In this study, three single-axis vibration sensors for X, Y, and Z axes were attached on the surface of the test motor to measure the vibration value of vibration. Analog data collected from these sensors was used in classification models for anomaly detection. Since the classification accuracy was around only 93%, commonly used hyperparameter optimization techniques such as Grid search, Random search, and Bayesian Optimization were applied to increase accuracy. In addition, Response Surface Method based on Design of Experiment was also used for hyperparameter optimization. However, it was found that there were limits to improving accuracy with these methods. The reason is that the sampling data from an analog signal does not reflect the patterns hidden in the signal. Therefore, in order to find pattern information of the sampling data, we obtained descriptive statistics such as mean, variance, skewness, kurtosis, and percentiles of the analog data, and applied them to the classification models. Classification models using descriptive statistics showed excellent performance improvement. The developed model can be used as a monitoring system that detects abnormal conditions of the motor test.

1. 서 론
2. 데이터셋 및 하이퍼파라미터 선정
    2.1 데이터셋 수집 및 분류모형 학습
    2.2 하이퍼파라미터 선정
3. 하이퍼파라미터 최적화 수행
4. 기술통계치를 활용한 분류모형 개발
5. 결 론
Acknowledgement
References

• Jaehun Kim(Department of Industrial & Systems Engineering, Changwon National University) | 김재훈 (국립창원대학교 산업시스템공학과)
• Sangcheon Eom(Department of Industrial Engineering, Pusan National University) | 엄상천 (부산대학교 산업공학과)
• Chulsoon Park(Department of Industrial & Systems Engineering, Changwon National University) | 박철순 (국립창원대학교 산업시스템공학과) Corresponding author