US 11,897,552 B2
Steering control system
Tetsuya Morino, Susono (JP); Yoshio Kudo, Machida (JP); Isao Namikawa, Okazaki (JP); and Takashi Kodera, Okazaki (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and JTEKT CORPORATION, Osaka (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken (JP); and JTEKT CORPORATION, Osaka (JP)
Filed on Apr. 1, 2021, as Appl. No. 17/220,014.
Claims priority of application No. 2020-072834 (JP), filed on Apr. 15, 2020.
Prior Publication US 2021/0323599 A1, Oct. 21, 2021
Int. Cl. B62D 5/04 (2006.01); B62D 5/00 (2006.01); B62D 6/00 (2006.01)
CPC B62D 5/046 (2013.01) [B62D 5/006 (2013.01); B62D 6/00 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A steering control system for a steer-by-wire vehicle, the steering control system comprising:
a turning motor for turning wheels of the vehicle;
a reaction torque motor for applying a reaction torque to a steering wheel of the vehicle;
a controller configured to execute:
a turning angle calculation for calculating a target turning angle of the wheels for controlling the turning motor based on a steering angle of the steering wheel; and
a reaction torque calculation for calculating a target reaction torque for controlling the reaction torque motor based on a state of the vehicle,
wherein, when an alert request is issued, in the reaction torque calculation, the controller is configured to:
calculate a basic reaction torque based on the steering angle,
calculate an alert reaction torque for notifying the state of the vehicle, and
calculate the target reaction torque, which is a total torque obtained by summing the basic reaction torque and the alert reaction torque,
wherein, in a process of the turning angle calculation calculating the target turning angle from the steering angle, the controller is configured to calculate the target turning angle by excluding a steering angle or a turning angle corresponding to the alert reaction torque, and
wherein, in the turning angle calculation, the controller is configured to:
calculate a driver steering angle from which a frequency component of a steering angle corresponding to the alert reaction torque is removed by performing a filter processing on the steering angle, and
calculate the target turning angle based on the driver steering angle.