Gear dynamicsSpin-off of Politecnico di Torino
Accurate, quiet transmissions that last: design, optimise and validate them before the prototype.
Why we exist
Calculation, CAD, FEM, prototype. One problem with noise, accuracy or wear and you start all over again. We bring dynamics into the design phase, when changes still cost little.
Lab · Try it yourself
A few µm of micro-geometry decide accuracy, noise and service life. Move the tip relief and look for the minimum of the transmission error, the gap between real and perfect motion. Then watch the dynamic factor across the speed range: the right relief flattens the resonance, so the teeth carry less overload, wear less and backlash grows more slowly. Press Listen to hear the mesh order of this pair.
Teeth in contact two pairs
Kv with this reliefunmodifiedteeth lose contactISO 6336-1 main resonance range (nE1 17,600 rpm)
Kv is the maximum dynamic mesh force divided by the static force, in steady state during a slow run-up. The tall peak is the mesh resonance; the smaller ones below it are super-harmonic resonances, at about 1/2 and 1/3 of that speed. In ISO 6336 this factor multiplies the tooth load in the bending and pitting ratings: a lower peak means lower stresses, less wear and backlash that grows more slowly.
Synthesised gear whine. Turn the volume down before you press it.
Transmission error 7.3 µm peak to peak, 0.0 dB compared with the unmodified gear. Dynamic factor 1.17 at this speed, peak 3.23 @ 15,800 rpm.
Simplified model: steel spur pair z₁ 23, z₂ 37, m 3, b 20 mm, linear tip relief, tooth pair and mesh stiffness as in ISO 6336-1, exact corner contact outside the path of contact. Dynamics with one degree of freedom along the line of action, contact loss and damping ratio 0.07. It shows the physics, it is not the GeDy TrAss solver.
What we do
A tool, a team of engineers, a training path: for every phase of transmission design.
S.01 · SaaS platform
A cloud platform built on patented numerical methods: from requirement to validated design, with strength, dynamics and noise computed during design. It plugs into your existing CAD / CAE workflows.
S.02 · Consulting
S.03 · In-house training
Fields of application
Gears are everywhere power has to be transmitted with precision. These are the main fields where our methods apply.
And wherever a transmission has to stay accurate, quiet and reliable over the years.
From the solver
Scroll sideways to see all the simulations.
Origin
The method comes from years of research on high performance components with automotive and aerospace companies, in the DIMEAS department of Politecnico di Torino.
Carlo Rosso
President and co-founder
Fabio Bruzzone
Co-founder and CTO
Andrea Re
CEO
Rodolfo Girardo
IT consultant
Research
The method behind the solver has been presented to the scientific community and compared with experimental data from our own test bench.
May the torque be with you
