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Can anyone point me to time series data in the domain of machine monitoring/condition monitoring (for example, vibration analysis data)?

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With some clever thinking you can find anything.

I searched 'vibration data filetype:csv'.

In the results was some very complete data set: see here for example

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I would go to statistical analysis software documentation (like the SAS/QC product, or the R quality contral task view) and look at the data sets used as examples for the particular type of machine condition/monitoring application you're looking for

SAS/QC: http://support.sas.com/documentation/onlinedoc/qc/indexproc.html#qc132

check out monitoring (shewhart charts, MVP procedures) and reliability procedures.

In R, check out the survival task view: http://cran.r-project.org/web/views/Survival.html

(survival analysis is the parent area of reliability, you use the same machinery to think about survival of a patient with cancer X as you do for an alternator with coil type Y).

For monitoring in R, the packages are not so well organized, but SPC, QCC http://cran.r-project.org/web/packages/spc/ http://cran.r-project.org/web/packages/qcc/

should help.

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