The software · Simulate
NExT DYNASIM
The physical digital twin of the convoy
Physics deterministic to the bit, failure scenarios on the real dynamics, a standards bench.
AI suggests. Physics proves.
The twin under load
The physical digital twin of the modular convoy: physics at 2,000 Hz, deterministic to the bit | every run is reproducible and citable as evidence. Pacejka tyres, suspensions from the CAD hardpoints, couplings calibrated against real load-cell tests.
Tests are picked from a catalogue of standard manoeuvres: the ISO 3888-2 moose test, the ISO 3888-1 double lane change, FMVSS 126 sine-with-dwell, the constant-radius skidpad ISO 4138, rearward amplification ISO 14791. Set speed, grip and the parameters of the manoeuvre, and the test runs on the convoy's dynamics, from the moose test to the urban junction to the 10 m radius curve.
ISO 3888-2 moose test at 65 km/h · three-module convoy
On the same road
The comparison with conventional vehicles happens on the same metres of road: three modules against a 10.6 m bus, five modules against an 18 m articulated one. On a real alpine hairpin (a scan of the road) the reference vehicle drives the same curve, as a ghost in the same scene.
Five locked modules measure 18.2 m, the length of an articulated bus, yet they take the hairpin snaking module by module.
Alpine hairpin · the reference vehicle is the green outline
The limit scenarios
Faults are injected while the simulation is running: open the axle, pick the failure mode (full-stroke hardover, locked actuator, inverted command, slow drift, unstable actuator) and the physics carries on from there, no restart.
Alongside, the same vehicle without the fault keeps driving, the ghost: the gap that opens between the two is the measure of the effect.
Steering hardover injected at 80 km/h · the ghost drives on undisturbed
The HARA scenarios
HARA scenarios are classified by train configuration and by ASIL, with S, E and C row by row: steer-by-wire, hardover, accidental uncoupling on the move, blackout. Every row of the table runs on the real dynamics, and it runs twice: first in the base scenario, then with the mitigation strategies active. The measured effect and the residual risk go back into the row they came from.
Same hardover · ay max 0.62 g and the train sideways without mitigations, 0.21 g and in lane with the lock active
The standards bench
Beyond the dynamic manoeuvres: UN R13 braking, UN R107 corridors, WLTP cycles. FMI 2.0 export for Simulink and for the whole toolchain: every model leaves the sim and comes back where it is needed.
The proof
2,000 Hz
deterministic physics, every run reproducible to the bit
NExT DYNASIM
18.2 m
five locked modules, the length of an articulated bus
In sim, under load
ISO 26262
full HARA campaign on the real dynamics, ASIL row by row
Safety
100%
in the browser, zero install · FMI 2.0 export
NExT DYNASIM
Frequently asked questions
What vehicles can I simulate with NExT DYNASIM?
NExT DYNASIM simulates both traditional vehicles (vans, buses, articulated buses) and multi-axle vehicles with trailers, possibly multiple, passive or active, like the NExT vehicles it was built for.
Can I simulate ISO 26262 HARA fault scenarios with NExT DYNASIM?
With NExT DYNASIM you can not only simulate fault scenarios in real time, but also implement the mitigation measures and verify whether the new solution is failsafe.
What homologation scenarios can I simulate with NExT DYNASIM?
With NExT DYNASIM, beyond urban and everyday situations, the standards-based scenarios include: moose test and double lane change (ISO 3888), constant-radius skidpad, sine-with-dwell, slalom, trailer rearward amplification (ISO 14791), lateral transient response (ISO 14793), steering hardover, braking, and a rolling-road dyno cycle.
Can NExT DYNASIM also simulate vehicle energy consumption?
With NExT DYNASIM you can simulate both the WLTP cycle on the rolling road per the standard and realistic routes, to see how much energy the vehicle consumes on the roads of your operating environment.
Where does NExT DYNASIM run, and how do I install it?
NExT DYNASIM is the only vehicle-dynamics simulator that runs in real time right in your browser, with no installation.
Can I customize the vehicles in NExT DYNASIM?
NExT DYNASIM exposes around 160 in-app settings (up to about 176 on a 5-module train): for example, the 3D suspension geometry, the .tir files with the Pacejka tire model, and active or passive steering axles. You can also request a specific custom build from NExT.
Can I import a custom road segment into NExT DYNASIM?
For now, importing new road geometries into NExT DYNASIM is handled on request by the NExT team.
Can I drive the vehicles in NExT DYNASIM with my PC driving kit?
NExT DYNASIM supports driving, including an FPV view plus a top-down view, with a Logitech G29 straight from the browser: it is the best way to learn to drive anything from a single module up to five articulated modules before you hit the road.
How much does NExT DYNASIM cost?
NExT DYNASIM has different plans for individuals, academia and schools, and companies. Request information through the form below for a demo and a dedicated quote.
Who it's for
OEMs, Tier-1, engineering firms and research centres: anyone who has to simulate, validate or certify the dynamics of a vehicle.
Request a demo
Request a demo or a study dedicated to your needs.
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