I think we can agree, based on the video footage of the wheels/tyres and the data above, that we improved the cabin vibration level we attributed to first-order tyre vibrations (T1). While I did not capture 4 x accelerometers at the key chassis locations post-fix, if we use the peak ...
Results below were obtained from the VW Golf with vibration evident throughout the cabin at 70 mph. Looking at the screenshot above we were able to clearly measure a vibration level of 21.4 mg from the accelerometer attached to the seat rail at 69 mph (speed reported by the customer). The...
The first resonance peak near 200 Hz is very close to the estimate value above. More importantly, however, note that over the range of 0–600 Hz range, the SNR of the DTPS is approximately ten times (20 dB) higher than that either of the directional microphones. Figure 2. Comparison of...
This cyclical extension of the Shock Tool mandrel creates the axial oscillation motion which spreads through the drill string, both above and below the DAS [17]. The type of axial vibration motion is considered to be sine or cosine [10]. Lubricants 2018, 6, x FOR PEER REVIEW Lubricants ...