US Patent 11787465 Steering control apparatus

A steering control apparatus is configured to control a steering system having a structure in which a power transmission path between a steering mechanism and a steering operation mechanism including a motor configured to generate a motor torque is separated. The steering control apparatus includes a controller configured to control driving of the motor. The controller detects an abnormality of the steering operation mechanism when a value indicating a variation in the motor torque is a value indicating a state in which a steering operation shaft is presumed to be immovable though the motor torque is applied.