A data-driven approach to diagnostics of repetitive processes in the distribution domain: Applications to gearbox diagnosticsin industrial robots and rotating machines

A data-driven approach to diagnostics of repetitive processes in the distribution domain : Applications to gearbox diagnosticsin industrial robots and rotating machines

Carvalho Bittencourt, André, 1984- (author): Linköpings universitet,Reglerteknik,Tekniska högskolan

Gunnarsson, Svante (author): Linköpings universitet,Reglerteknik,Tekniska högskolan

Norrlöf, Mikael (author): Linköpings universitet,Reglerteknik,Tekniska högskolan,ABB Robotics, Västerås, Sweden

(creator_code:org_t)

Elsevier, 2014
2014
English.
In: Mechatronics (Oxford). - : Elsevier. - 0957-4158 .- 1873-4006. ; 24:8, s. 1032-1041

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Abstract Subject headings

This paper presents a data-driven approach to diagnostics of systems that operate in a repetitive manner. Considering that data batches collected from a repetitive operation will be similar unless in the presence of an abnormality, a condition change is inferred by comparing the monitored data against an available nominal batch. The method proposed considers the comparison of data in the distribution domain, which reveals information of the data amplitude. This is achieved with the use of kernel density estimates and the Kullback–Leibler distance. To decrease sensitivity to disturbances while increasing sensitivity to faults, the use of a weighting vector is suggested which is chosen based on a labeled dataset. The framework is simple to implement and can be used without process interruption, in a batch manner. The approach is demonstrated with successful experimental and simulation applications to wear diagnostics in an industrial robot gearbox and for diagnostics of gear faults in a rotating machine.

By the author/editor: Carvalho Bittenc ...; Saarinen, Kari; Sander Tavallaey ...; Gunnarsson, Svan ...; Norrlöf, Mikael

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Robotics

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