The approach
Sync to the shaft, max out the evidence
To get a complete picture of the noise quality of a source dominated by rotor-synchronous excitation, ramp measurements at several load levels have become established practice. Our analysis methods extract the full information these measurements contain.
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Conventional methods
Proven analysis of rotating machines, properly referenced to speed.
- FFT spectra and spectrograms
- Order analysis over shaft angle (order tracking)
- Order cuts, levels over speed and level averages
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Advanced methods
In-house developments that separate the excitation mechanisms and name the cause.
- Separation of transfer behaviour and order excitation
- Distinguishing deterministic from stochastic excitation
- Modal analysis based on ramp measurements
- Automated attribution of anomalies to their causes. Prerequisite: the data for building a kinematic model is provided
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Reporting
Results that can be traced and reproduced months later.
- Analysis as a versionable script with an HTML and/or PDF report
- Every statement with its provenance: model version, load case, parameters
- Reports with traceable provenance, accessible to the project team
- Export of the root cause analysis as a presentation