NVHPowertrain / E-drive NVH teams
WOT Acceleration Order Analysis and Campbell Diagram
01
Pain Points
- !Which order is "that hum at 3000 rpm"? It comes down to guesswork.
- !Orders, resonances, and mesh frequencies blur together in one waterfall; manual peak labeling is slow and inconsistent.
- !Switch the vehicle or the channel and you start over; nothing is preserved.
02
The Tinia Approach
Resample by RPM into the order domain; waterfall and Campbell diagrams label resonance peaks automatically. Switch vehicles by swapping the data source — the labeling logic stays in the nodes.
Select channelOrder trackingSpectrum smoothingCampbell diagramSlice labeling
03
Nodes Used
Channel Selectchannel_select
Pick the audio/vibration channel of interestOrder Trackingorder_tracking
Resample by RPM into the order domainSpectrum Smoothingspectrum_smooth
Suppress waterfall noisePivot Matrixmatrix_view
Order-RPM colormap / Campbell diagramIndicator Viewerindicator_viewer
Per-order slice curves + peak labelingCore nodes; add or remove steps as needed for your data and standards — the node graph is always editable.
04
Expected Output
- Order-RPM waterfall and Campbell diagram with automatic resonance-peak labeling.
- 1 / 2 / 4 order slice curves that pinpoint which order sounds at which RPM.
- A reusable workflow — rerun in one click after switching vehicle or channel.
Reference Standards / Engineering PracticeEngineering practice (no mandatory standard)
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