The number of traffic accidents with personal injury and property damage is increasingly being reduced. Nevertheless, to date more than a third of these accidents cannot be prevented because their causes are due to wet, snow- or ice-covered road surfaces, according to the Federal Statistical Office of Germany (2022). This paper reports on a Steer-by-Wire steering system that is being measured on a mechanical hardware-in-the-loop test bench in cooperation with Volkswagen AG in order to determine the transmission behavior and control quality of this steering system. Subsequently, the driving dynamics and acceptance of a previously developed functionality of this Steer-by-Wire steering system will be investigated on the institute's own driving simulator within the scope of various user studies. The functionality described above corresponds to an automated countersteering during straight-ahead braking according to ISO 14512 on road surfaces with split road friction coefficients. The test subjects in the driving simulator evaluate not only the driving dynamics, but in particular the acceptance and steering feel (haptic steering torque of the driving situation) of different application variants of this functionality. These variants range from an assisted to an automated function that does not report changing steering torque back to the driver at all. Finally, the acceptance of these application variants is compared with a conventional yaw moment build-up delay currently in series production today. For this purpose, the user study is repeated without an automated countersteering with a yaw moment build-up delay.

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Driving simulator study on acceptance of a Steer-by-Wire steering system during braking on mue split

  • Tim Ahrenhold,
  • Frederik Achilles,
  • Hendryk Lausch,
  • Roman Henze

摘要

The number of traffic accidents with personal injury and property damage is increasingly being reduced. Nevertheless, to date more than a third of these accidents cannot be prevented because their causes are due to wet, snow- or ice-covered road surfaces, according to the Federal Statistical Office of Germany (2022). This paper reports on a Steer-by-Wire steering system that is being measured on a mechanical hardware-in-the-loop test bench in cooperation with Volkswagen AG in order to determine the transmission behavior and control quality of this steering system. Subsequently, the driving dynamics and acceptance of a previously developed functionality of this Steer-by-Wire steering system will be investigated on the institute's own driving simulator within the scope of various user studies. The functionality described above corresponds to an automated countersteering during straight-ahead braking according to ISO 14512 on road surfaces with split road friction coefficients. The test subjects in the driving simulator evaluate not only the driving dynamics, but in particular the acceptance and steering feel (haptic steering torque of the driving situation) of different application variants of this functionality. These variants range from an assisted to an automated function that does not report changing steering torque back to the driver at all. Finally, the acceptance of these application variants is compared with a conventional yaw moment build-up delay currently in series production today. For this purpose, the user study is repeated without an automated countersteering with a yaw moment build-up delay.