Title:
VEHICULAR STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/157727
Kind Code:
A1
Abstract:
A vehicular steering device according to the present invention is provided with a target steering torque generation unit that generates a target steering torque for a reaction force motor, and a torque correction value calculation unit that generates a torque signal Tref_p corresponding to a road surface reaction force acting on the steered wheel of a vehicle. The torque correction value calculation unit generates the torque signal Tref_p by: dividing an estimated road surface reaction force into a low-frequency component and a high-frequency component; carrying out level limitation with respect to each of the low-frequency component and the high-frequency component; and adding up torque values obtained by conversion from the low-frequency component and the high-frequency component after the level limitation. The target steering torque generation unit generates the target steering torque by adding up a torque signal Tref_a generated on the basis of a predetermined basic map corresponding at least to a vehicle speed and a steering angle of the vehicle, and the torque signal Tref_p.
Inventors:
TANAKA KEITAROU (JP)
Application Number:
PCT/JP2021/004436
Publication Date:
August 12, 2021
Filing Date:
February 05, 2021
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B62D6/00; B62D5/04
Foreign References:
| JP2005335587A | 2005-12-08 | |||
| JP2003081111A | 2003-03-19 | |||
| US6625530B1 | 2003-09-23 | |||
| JP2007153249A | 2007-06-21 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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