A valid run isn’t always guaranteed
Brake testing is performed under tightly controlled conditions. Entry speed must sit inside a defined window. Trigger timing must be correct. Stopping distance and MFDD should be accurate and reliable for regulatory compliance.
If speed drifts, deceleration traces are noisy or timing is misaligned, the result doesn’t count. Even when the vehicle performs correctly, uncertainty in the measurement of the data leads to repeated runs, questioned results and lost time on track.
Brake engineers need a clear measurement of motion which combines GNSS, IMU, CAN and external sensor data to prove compliance and ensure consistent results.
Measure motion from start to finish
Dynamics Duo combines high-accuracy GNSS from VBOX 4 with low-noise inertial data from IMU05 to provide a single, aligned reference for vehicle motion during braking.
Speed, longitudinal acceleration and distance are measured and correlated to reference the motion of the vehicle correctly. The result is clean, repeatable braking data that supports pass/fail decisions and regulatory requirements.
Verified and Reportable Results
Brake testing engineers require accurate stopping distance and MFDD.
Dynamics Duo provides:
- True vehicle speed at trigger
- Clean longitudinal acceleration profile (Ax)
- Accurate stopping distance and time to stop
- Reliable MFDD calculation from stable deceleration data
This ensures results are consistent across repeated runs.
Ensure Run Validity
Incorrect entry conditions invalidates runs. With a unified motion reference:
- Speed and position confirms correct approach conditions
- Speed at test gates is consistent between runs
- Trajectory confirms straight-line path
- Brake trigger is aligned with run data
This ensures consistent testing, with real-time run feedback on run validation on the track.
Consistent MFDD results, avoiding re-runs
Small variations in pitch and attitude can distort deceleration measurements.
With low-noise inertial data:
- Pitch rate changes are measured during heavy braking
- Longitudinal acceleration is referenced correctly
- Early trigger distortion can be identified
- Run-to-run variation is reduced
IMU05 data creates MFDD results which avoid result failures.
Align Driver Input with System and Vehicle Response
It’s important to understand driver, system, vehicle and external sensor data under braking.
Dynamics Duo allows you to:
- Log pedal force, brake pressure and trigger timing
- Capture wheel speeds and ABS activity via CAN
- Compare brake input with deceleration response
- Align GNSS, IMU, CAN and external sensor data on one timeline
This separates driver influence from system behaviour post analysis.
Handle Split-μ and Stability When Required
For non-straight-line braking, the system enables:
- Yaw rate measurement during asymmetric braking
- Lateral acceleration monitoring under split-μ
- Clear interpretation of vehicle rotation and path
- Correlation between vehicle intervention and motion
When stability becomes a factor, the data remains clear and usable.
