Bearing variable conditions testing

Description

Bearing variable conditions testing is an experimental dataset designed to support the development and validation of bearing fault diagnosis methods under stationary and variable-speed operating conditions. The test rig consists of an electric motor coupled to a shaft supported by inboard and outboard bearings. The dataset includes measurements from a healthy bearing and from an MB ER-12K inboard bearing with an outer-race defect. This bearing has eight rolling elements and an outer-race fault frequency factor of 3.048 orders, meaning that its theoretical outer-race fault frequency is 3.048 times the shaft rotational frequency. The dataset contains four 10-second tests: - Nextmon_MFS_1: Healthy bearing operating at a constant rotational frequency of 50 Hz. - Nextmon_MFS_2: Healthy bearing operating under variable-speed conditions, following speed ramps through 14.2, 23.4 and 17.6 Hz. - Nextmon_MFS_3: Inboard bearing with an outer-race defect, operating under the same variable-speed profile: 14.2, 23.4 and 17.6 Hz. - Nextmon_MFS_4: Inboard bearing with an outer-race defect, operating at a constant rotational frequency of 50 Hz. The main objective is to support the diagnosis of bearing defects under variable-speed conditions and enable comparisons between healthy and faulty bearing responses under both constant and changing rotational speeds. Vibration measurements were acquired using PCB 608A11 accelerometers, with a sampling frequency of 20,480 Hz and an antialiasing filter set to 8,000 Hz. The recorded channels are ordered as follows: Tach, Motor Vert, Motor Hor, Motor Ax, Ib Brg Vert, Ib Brg Hor, Ib Brg Ax, Ob Brg Vert, Ob Brg Hor, Gearbox Ax, Gearbox Hor, Gearbox Vert, Prox Probe1, Prox Probe2, Motor Cur1, Motor Cur2 Motor Vert, Motor Hor and Motor Ax correspond to vibration measurements on the motor. Ib Brg Vert, Ib Brg Hor and Ib Brg Ax correspond to the inboard bearing location, while Ob Brg Vert and Ob Brg Hor correspond to the outboard bearing location. Tach provides the rotational reference. The remaining channels contain additional gearbox, proximity probe and motor current measurements, not relevant to the current experiment. Each data file includes a row labelled “Volts/Unit”, containing the calibration factor for each channel. Calibrated values are obtained by dividing every recorded value by the corresponding value in this row: Calibrated value = recorded value / corresponding Volts/Unit value

Steps to reproduce

The testrig used is the MFS (Machine Fault Simulator) from Specrtraquest.

Institutions

• Tecnalia

  Basque Country, Donostia / San Sebastian

Categories

Funders

• Agencia Estatal de Investigación

  Ministerio de Ciencia, Innovación y Universidades

  Madrid, Madrid

  Grant ID: CPP2023-010810

Related Links

Licence