Motor fault diagnosis scheme by machine noise integration and signal similarity measurement

Aiming at the irregularity of the fault characteristics of the helicopter main reducer planetary gear, a fault diagnosis method based on support vector data description (SVDD) is proposed. The working condition of the helicopter is complex and changeable, and the fault characteristics of the planetary gear also show irregularity with the change of working conditions. It is impossible to diagnose the fault by the regularity of a single fault feature; so a method of SVDD based on Gaussian kernel function is used. By connecting the energy characteristics and fault characteristics of the helicopter main reducer running state signal and performing vector quantization, the planetary gear of the helicopter main reducer is characterized, and simultaneously couple the multi-channel information, which can accurately characterize the operational state of the planetary gear’s state.

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Study on Fault Diagnosis of Planetary Gearbox in Unmanned Aerial Vehicle Using Multi sensor Data

Journal of Applied Reliability ◽

10.33162/jar.2020.12.20.4.332 ◽

2020 ◽

Vol 20 (4) ◽

pp. 332-342

Author(s):

Hyung Jun Park ◽

Seong Hee Cho ◽

Kyung-Hwan Jang ◽

Jin-Woon Seol ◽

Byung-Gi Kwon ◽

...

Keyword(s):

Fault Diagnosis ◽

Unmanned Aerial Vehicle ◽

Sensor Data ◽

Planetary Gearbox ◽

Aerial Vehicle

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Signaling Similarity in the Icelandic Labour Market: How Can Immigrants Reduce Statistical Discrimination?

MIGRATION LETTERS ◽

10.33182/ml.v17i2.761 ◽

2020 ◽

Vol 17 (2) ◽

pp. 349-356

Author(s):

Kari Kristinsson ◽

Margret Sigrun Sigurdardottir

Keyword(s):

Labour Market ◽

Qualitative Interviews ◽

Immigrant Integration ◽

Statistical Discrimination ◽

Hiring Decisions ◽

Market Participation ◽

Job Experience ◽

Labour Market Participation ◽

Signal Similarity

Research on immigration has emphasized the role that statistical discrimination plays in hiring decisions. A better understanding of how immigrants overcome this type of discrimination might lead to better interventions to improve their labour market participation. In this paper, we use qualitative interviews to examine how immigrants can reduce statistical discrimination by signalling their similarity to employers in their job applications. Specifically, we find that immigrants who demonstrate signal similarity to employers in the type of education, job experience and religion tend to reduce their statistical discrimination by employers. We suggest how further research can build on these results to provide possible tools for immigrant integration.

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Case Study on Fault Diagnosis of the Actual Operating Transformer by FRA

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes.131.78 ◽

2011 ◽

Vol 131 (1) ◽

pp. 78-85 ◽

Cited By ~ 1

Author(s):

Takahiro Sano ◽

Yoshiharu Ogawa ◽

Takaaki Shimonosono ◽

Tadayuki Wada

Keyword(s):

Fault Diagnosis ◽

Actual Operating

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