Data files are normal text-files where each line has space-separated
values for one measurement run. For example, in the example files
there are 40 measurements (40 lines) in each file, and each
measurement consists of 11 seconds of data measured at 3kHz frequency
and thus 33000 values per line. Each line must have the same number of
values.

The examples are measurements of stator current from electrical motors
with and without bearing damages. 

Files:
  data1/ - Measurements with no load connected to the
           motor. Distinguishing between measurements from normal and
           damaged motors is relatively easy because of lack of other
           sources of noise and abnormalities.

  data2/ - Motor working at full load. Full load causes various
           disturbances and noise, so distinguishing between 
           normal and damaged motors is considerably more difficult
           than in no-load case.

    ehja*.dat  - Measurements with normal bearings.
    rikki*.dat - Measurements with damaged bearings.

If you need further details of the measurement configuration or the
used motors/bearings, please contact the authors.