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  • #5170
    bprice
    Participant

    We were considering two possible prediction scenarios:

    1) instantaneous vector of attributes Fx,Fy,Fz,Vx,Vy,Vz,Ae at some time t
    with the expectation that we predict wear at time t

    2) a trajectory of the attributes from time 1 up to time t,
    with the expectation that we predict wear at time t

    Would you be able to clarify the expected paradigm?

    Regards,

    Bob.

    We were considering two possible prediction scenarios:

    1) instantaneous vector of attributes Fx,Fy,Fz,Vx,Vy,Vz,Ae at some time t
    with the expectation that we predict wear at time t

    2) a trajectory of the attributes from time 1 up to time t,
    with the expectation that we predict wear at time t

    Would you be able to clarify the expected paradigm?

    Regards,

    Bob.

    #5604
    bprice
    Participant

    Another clarification question:

    We are assuming that we will be getting at least an entire cut file of observations as input so that statistics and spectral features can be calculated.

    Regards,

    Bob.

    #5606
    eklund
    Keymaster

    Each training record contains one “wear” file that lists wear after each cut in 10^-3 mm, and a folder with approximately 300 individual data acquisition files (one for each cut). The data acquisition files are in .csv format, with seven columns, corresponding to:
    Column 1: Force (N) in X dimension
    Column 2: Force (N) in Y dimension
    Column 3: Force (N) in Z dimension
    Column 4: Vibration (g) in X dimension
    Column 5: Vibration (g) in Y dimension
    Column 6: Vibration (g) in Z dimension
    Column 7: AE-RMS (V)

    The spindle speed of the cutter was 10400 RPM; feed rate was 1555 mm/min; Y depth of cut (radial) was 0.125 mm; Z depth of cut (axial) was 0.2 mm. Data was acquired at 50 KHz/channel.

    Attribute (feature) extraction per se is up to the competitors. If you download the data on the main competition page:
    https://www.phmsociety.org/competition/phm/10

    You will find that there are actually 1890 cut files available to work with!

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