Troubleshooting Driver Modeling

Below are some recommendations for using Altair Driver:

Symptom

The driver simulation fails immediately.

Remedy

Verify that the vehicle position is consistent with the specified path. The path points need to be close to the vehicle at design position.

Symptom

The driver seems to turn the steering wheel angle counter-intuitively and it does not follow the prescribed path. The simulation fails.

Remedy

This is probably caused by positive feedback. This can be fixed by reversing the sign of the steering wheel angle signal or the steering rack ratio.

Symptom

The driver follows the path, but it is too sluggish. The simulation fails.

Remedy

This could be caused by a preview time that is too long for the maneuver and the vehicle speed, especially if the steering signal seems to start responding too soon.

Symptom

The driver follows the path, but its actions are too sudden and the steering wheel angle signal is too jumpy.

Remedy

This could be caused by a preview time too short for the maneuver and the vehicle speed, especially if the steering signal seems to start responding too late.