PSV-A-440 Optical DerotatorThe convenient and non-contact mapping of operational deflection shapes is a specialty of Polytec’s Laser Scanning Vibrometers. Now also rotating objects such as fans for consumer products and vehicles, turbines or tires can be characterized under operational conditions up to 24,000 RPM.
The actual deflections shapes and resonant frequencies due to stiffening effects at high RPM levels are measured and can be taken into account in the validation process of FE models. By means of the Optical Derotator order analysis and vibration measurements become feasible in a simple manner. Telemetry systems become unnecessary. Sophisticated control electronics track the motion of the rotating object, resulting in a steady position of the laser beam. The actual measurement is astonishingly simple. Due to the synchronized speed of the derotator and the object appears to stand still.
The PSV-A-440 Optical Derotator is either supplied as an add-on for PSV-400 Scanning vibrometers or as a complete solution comprising the Rotating Unit with encoder input, a control unit, as adjustable base frame for angular and high adjustment, a PSV-400 Scanning Vibrometer and a single point reference laser. A software module installed at the DMS of the PSV allows easy configuration of the derotator control for dynamic run–up tests and static tests.
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