Test Beds

We utilize the below equipment to aid in our research. Click within a section to learn more about each test bed.

Accelerated Bearing Degradation Test Bed

This test bed is designed to run accelerated degradation tests on rolling element bearings. The setup provides the capability for running tests under constant as well as time-varying operational conditions, specifically using various configurations of load and speed profiles. It also serves as a platform for implementing prototypes software modules for sensor-Driven Replacement software and Sensor-Driven Spare Part Inventory software.

The test bed consists of a custom designed bearing testing chamber where test bearings are installed, loaded, and run to failure in an oil-bath. The upper race of the bearing is attached to the rotating shaft and the lower race is mounted on the base of the chamber. Two accelerometers are used to measure vibration of the chamber. A hydraulic unit and a cylinder provide axial loading (up to 2250 lbs/10 kN) capability while 1.5 HP DC motor (1750 rpm) along with a stacked pulley mechanism provides rotational motion at various speeds. Two feedback control loops are designed to maintain load and speed at designated target values with the aid of a tachometer for measuring rotational speed and a load cell placed under the test chamber to monitor the applied loads. Lubricating system provides lubricating oil to the test chamber while the tests are being performed. The system consists of an oil reservoir, a gear pump, and a filter. Oil is input at the top of the chamber and exists through a hose at the bottom. Data acquisition hardware from National instruments include, and NI-USB 6229 Board and an NI PCI-4462 board.

Photograph of Accelerated Bearing Degradation Test Bed

Multi-Component Diagnostics and Prognostics Research

A Drivetrain Diagnostics and Prognostics test bed specifically designed to simulate industrial drivetrains with capability for performing accelerated degradation of gears and bearing, either simultaneously or individually (Courtesy of Spectraquest). The test bed is used to enable and facilitate advanced diagnostics and prognostics research for multi-component systems with specific capability to investigate degradation interactions; Component-to-Component (C2C) interaction, and Component-to-System (C2S) interaction.

The test bed consists of two a two two-stage parallel shaft test gearbox. Both torsional and radial loadings can be applied to study damage signature or propagation in gears and/or bearings: the torsional load is applied via a 10 HP variable frequency AC drive with a programmable, user-defined speed profiles; and the radial load is applied to a shaft in the parallel gearbox. The effect faults like surface wear, crack tooth, chipped tooth and missing tooth can be demonstrated and induced on either spur gears or helical gears. Rolling element bearing faults like inner race, outer race, and ball damage can also be incorporated. Condition monitoring instrumentation includes accelerometers for measuring vibration, encoders for monitoring rotational speed, torques sensors, and a load cells for monitoring and radial loads applied on the gearbox shafts to accelerate bearing degradation.

Photograph of Multi-Component Diagnostics and Prognostics Test Bed

Electronics Diagnostics and Prognostics Research

The Typhoon 2.0 Environmental Chamber is used to perform Highly Accelerated Life Testing (HALT) on small electric and electronic products with capabilities to simulate thermal and vibrational stresses.

The testing chamber features include a 24” x 24” vibration table with 5 vibration actuators for inducing repetitive-shock vibration during testing. It has one Accelerometer for Table Control Provided; and (3) additional accelerometer input channels available. Two 72” thermocouples provided; (1)for Product, (1)for Air, and (4) additional thermocouple input channels available, and (8) User Controllable Solid State Relays. For thermal cycling, the chamber consists of a cooling system that uses liquid Nitrogen injection and has a temperature range of +200ºC to -100 ºC.

Photograph of Typhoon 2