About
An engineer, a gearbox, and one honest question
TODO — a paragraph about who you are: the engineering office, how long you have been working on drivetrain acoustics, and the kind of gearboxes you have spent that time with.
TODO — a paragraph about where the method comes from: the evaluation work that made shaft-synchronous, multi-basis order analysis necessary in the first place, and what was missing in the tools available at the time.
What has not changed is the question at the end of every campaign: can you name the component, and can you show why. Everything in the method exists to make that answer defensible rather than plausible.
How the work runs
Five steps, in this order
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Understand the complaint
What is heard, where, under which operating conditions — and who decided it is a problem. A noise that only appears in coast-down is a different investigation from one that scales with load.
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Check what the data can carry
Before analysing anything: is shaft angle available, is the run repeatable, does the speed range cover the suspected orders. If not, that is the first deliverable.
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Model the gear train
The kinematics define which orders each element can produce. This is what turns a spectrum into a list of testable hypotheses instead of a picture to stare at.
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Resolve and separate
Shaft-synchronous analysis per load-carrying mesh, sidebands included, so excitations that overlap in frequency stop overlapping in the result.
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State the conclusion with its limits
Named cause, operating range it holds for, separation quality behind it — and an explicit note where the data does not decide.
Principles
Three things I do not negotiate
Reproducible or it did not happen
Every figure traces back to a frozen analysis version: same data, same parameters, same result, months later.
No conclusion beyond the evidence
A ranked list of candidates with honest uncertainty is worth more than one confident answer that turns out wrong in the next build.
You keep the analysis
Not just a report. The model, the runs and the evaluation stay accessible to your team in the platform.