Health monitoring and machine prognosis is one of the important emerging scientific fields with high potential in terms of economic benefits for society. Having a benchmark in this field should allow us to experiment with new methods and provide an interesting showcase to highlight our research.
Many industries in fields such as aeronautics, hydraulics (pumps, turbines), actuator manufacturers, etc. are looking for effective system health monitoring techniques to implement preventive and predictive maintenance actions. Most faults and failures of rotating machines are attributed to the operational degradation of ball bearings, shaft misalignments, surface wear, and coupling wear due to misalignments or other factors (aggressor).
The test bench is co-funded by Polytech Nancy and is installed at Polytech Nancy.
Construction of an experimental test bench for the development and validation of methods and algorithms in the field of: estimation of health, reliability, and prognosis of failures of industrial systems (PHM: Prognosis and health management) as well as closed-loop control. The test bench can be used to create databases on bearing degradation under different operating conditions (see different input speeds).
The rotating mechanical part is driven by a three-phase asynchronous motor, powered by a speed controller connected to the speed sensor. This allows, in a closed loop, to modify the motor control. This allows the variation of the operational and input control conditions of the system. The motor shaft is connected to the reducer by an Oldham elastic coupling with a high damping capacity. These couplings are designed to compensate for angular and axial misalignments. The bearings will support the shaft and the inertia wheels. These wheels are discs pierced on the periphery so that they can receive masses to generate static or dynamic imbalances.
A mechanism designed to exert a radial force on the bearings is built and mounted at the end of the bar. The mechanism exerts a radial force of different amplitudes on the bearings, accelerating the degradation of the bearing at different speeds.
