Development of a test rig for monitoring and diagnosing the dynamic condition of rotating machines

This article presents the development and evaluation of a vibration test rig with two distinct shafts supported by different bearing systems to simulate diverse dynamic conditions. The first shaft, supported by hydrostatic oil bearings, offers precise vibration control and reduced friction, making it suitable for high-precision or heavy-duty applications. The second, a flexible shaft with ball bearings, replicates complex behaviours such as varying loads, speeds, resonances, and imbalance. Mounted on the same platform, both shafts enable controlled vibration data acquisition during ramp-ups, resonance, and transient scenarios. The system supports installation of eddy current proximity sensors and IEPE accelerometers, enabling precise measurement of shaft displacements and accelerations. Designed to replicate real-world machine dynamics, the rig provides insights into resonance, imbalance, and transient effects. Its versatility makes it a valuable tool for advancing vibration diagnostics, measurement system performance evaluation, and monitoring techniques, with applications across aerospace, power, and manufacturing industries.