A Concept for Using Road Wetness Information in an All-Wheel-Drive Control
This paper presents a concept for using road wetness information in an all-wheel-drive (AWD) control that distributes drive torques in the longitudinal direction. Driving on wet roads requires special attention. Not only does the road surface friction coefficient decrease, but driving dynamics targe...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/4/1284 |
| _version_ | 1827655391084806144 |
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| author | Georg Warth Philipp Sieberg Michael Unterreiner Dieter Schramm |
| author_facet | Georg Warth Philipp Sieberg Michael Unterreiner Dieter Schramm |
| author_sort | Georg Warth |
| collection | DOAJ |
| description | This paper presents a concept for using road wetness information in an all-wheel-drive (AWD) control that distributes drive torques in the longitudinal direction. Driving on wet roads requires special attention. Not only does the road surface friction coefficient decrease, but driving dynamics targets must be adjusted to prevent vehicle instability under wet conditions. As an exemplary application, the otherwise generic control concept is implemented on an AWD vehicle with a torque-on-demand transfer case. Therefore, the AWD topology of a drive train with a torque-on-demand transfer case is analysed in advance in terms of occurring torques and rotational speeds. In the following, the vehicle dynamics goals for driving in wet road conditions are described—divided into primary and secondary goals. Starting from a state-of-the art AWD control, an adaptive control strategy is derived by superimposing a wetness coordination unit. With the knowledge of occurring road wetness, this unit adapts newly introduced parameters in order to meet the target driving behaviour under wet conditions. Lastly, the derived AWD control is implemented into a 14-DOF, non-linear vehicle model in Matlab/Simulink, which is used as a virtual plant. The performance of the developed concept is assessed by the driving maneuver “Power On Cornering“ (PON), which means an acceleration out of steady-state circular motion. As its essential benefit, the AWD control enables a maximum spread between driving stability, agility and traction under combined dynamics when using wetness information. The newly introduced wetness coordination unit uses only a few additional and physically interpretable key parameters for this purpose, without significantly increasing the controller complexity. |
| first_indexed | 2024-03-09T22:06:05Z |
| format | Article |
| id | doaj.art-f6192f6da4644dc781b846b24abd20a7 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T22:06:05Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f6192f6da4644dc781b846b24abd20a72023-11-23T19:41:37ZengMDPI AGEnergies1996-10732022-02-01154128410.3390/en15041284A Concept for Using Road Wetness Information in an All-Wheel-Drive ControlGeorg Warth0Philipp Sieberg1Michael Unterreiner2Dieter Schramm3Dr. Ing. h.c. F. Porsche AG, 71287 Weissach , GermanyFaculty of Engineering, University of Duisburg-Essen, 47057 Duisburg, GermanyDr. Ing. h.c. F. Porsche AG, 71287 Weissach , GermanyFaculty of Engineering, University of Duisburg-Essen, 47057 Duisburg, GermanyThis paper presents a concept for using road wetness information in an all-wheel-drive (AWD) control that distributes drive torques in the longitudinal direction. Driving on wet roads requires special attention. Not only does the road surface friction coefficient decrease, but driving dynamics targets must be adjusted to prevent vehicle instability under wet conditions. As an exemplary application, the otherwise generic control concept is implemented on an AWD vehicle with a torque-on-demand transfer case. Therefore, the AWD topology of a drive train with a torque-on-demand transfer case is analysed in advance in terms of occurring torques and rotational speeds. In the following, the vehicle dynamics goals for driving in wet road conditions are described—divided into primary and secondary goals. Starting from a state-of-the art AWD control, an adaptive control strategy is derived by superimposing a wetness coordination unit. With the knowledge of occurring road wetness, this unit adapts newly introduced parameters in order to meet the target driving behaviour under wet conditions. Lastly, the derived AWD control is implemented into a 14-DOF, non-linear vehicle model in Matlab/Simulink, which is used as a virtual plant. The performance of the developed concept is assessed by the driving maneuver “Power On Cornering“ (PON), which means an acceleration out of steady-state circular motion. As its essential benefit, the AWD control enables a maximum spread between driving stability, agility and traction under combined dynamics when using wetness information. The newly introduced wetness coordination unit uses only a few additional and physically interpretable key parameters for this purpose, without significantly increasing the controller complexity.https://www.mdpi.com/1996-1073/15/4/1284all-wheel-drive controltyre informationvehicle dynamics |
| spellingShingle | Georg Warth Philipp Sieberg Michael Unterreiner Dieter Schramm A Concept for Using Road Wetness Information in an All-Wheel-Drive Control Energies all-wheel-drive control tyre information vehicle dynamics |
| title | A Concept for Using Road Wetness Information in an All-Wheel-Drive Control |
| title_full | A Concept for Using Road Wetness Information in an All-Wheel-Drive Control |
| title_fullStr | A Concept for Using Road Wetness Information in an All-Wheel-Drive Control |
| title_full_unstemmed | A Concept for Using Road Wetness Information in an All-Wheel-Drive Control |
| title_short | A Concept for Using Road Wetness Information in an All-Wheel-Drive Control |
| title_sort | concept for using road wetness information in an all wheel drive control |
| topic | all-wheel-drive control tyre information vehicle dynamics |
| url | https://www.mdpi.com/1996-1073/15/4/1284 |
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