Torsional Vibration

If the acceleration sensors provides information about linear movement, torsional vibration procedure provides the information about angular vibration. Imagine a long shaft going through the vehicle. Like each structure has linear natural frequencies, this shaft will have angular natural frequencies resulting at high angular vibration at certain rotation speed. To check the bending of the shaft, we mount any kind of angular sensor on each end of the shaft and measure the angle difference. The data can be used in order tracking to give a clear indication of natural frequencies.