Steering control system

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.