TY - GEN
T1 - A Satellite Fault Diagnosis Method Based on Focus Loss Function and Balance Factor
AU - Wu, Jifeng
AU - Wang, Yuechuan
AU - Chai, Senchun
AU - Liu, Xiaopeng
AU - Li, Zhaoyang
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/11/6
Y1 - 2020/11/6
N2 - Fault diagnosis is an effective method to protect satellites in orbit. In recent years, researchers have used data-driven methods to provide some solutions, but most of them have not considered the data imbalance in the satellite fault diagnosis. In response to this problem, this paper analyzes the imbalance problem from two aspects: the imbalance of sample distribution and the imbalance of misclassification cost. Additionally, based on the analysis, this paper proposes an online fault diagnosis method based on focus loss function and balance factor, which can focus the loss on the fault samples in training process. Through experiments, the model greatly improves the detection accuracy of fault samples from 49.5% to 93.2%. At the same time, this method can also provide reference for solving the problem of category imbalance in other industrial field.
AB - Fault diagnosis is an effective method to protect satellites in orbit. In recent years, researchers have used data-driven methods to provide some solutions, but most of them have not considered the data imbalance in the satellite fault diagnosis. In response to this problem, this paper analyzes the imbalance problem from two aspects: the imbalance of sample distribution and the imbalance of misclassification cost. Additionally, based on the analysis, this paper proposes an online fault diagnosis method based on focus loss function and balance factor, which can focus the loss on the fault samples in training process. Through experiments, the model greatly improves the detection accuracy of fault samples from 49.5% to 93.2%. At the same time, this method can also provide reference for solving the problem of category imbalance in other industrial field.
KW - balance factor
KW - focus loss function
KW - sample imbalance
KW - satellite fault diagnosis
UR - http://www.scopus.com/inward/record.url?scp=85100933094&partnerID=8YFLogxK
U2 - 10.1109/CAC51589.2020.9327411
DO - 10.1109/CAC51589.2020.9327411
M3 - Conference contribution
AN - SCOPUS:85100933094
T3 - Proceedings - 2020 Chinese Automation Congress, CAC 2020
SP - 1298
EP - 1303
BT - Proceedings - 2020 Chinese Automation Congress, CAC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 Chinese Automation Congress, CAC 2020
Y2 - 6 November 2020 through 8 November 2020
ER -