The present disclosure relates to an apparatus and a method for controlling a steer-by-wire system. In more details, the present disclosure relates to an apparatus and method for determining whether a catch-up is occurred due to a counter electromotive force in a rack drive motor in a steer-by-wire system and reflecting torque information that has not been output due to the catch-up on a steering reaction force motor, and thus providing an accurate steering sense for a driver.

The present disclosure relates to a steering control apparatus and method. The steering control apparatus includes a first steering control module and a second steering control module. The first and second steering control modules respectively include first and second temperature sensors detecting respective internal temperatures of the first and second steering control modules. The first steering control module can transmit information on a first temperature detected by the first temperature sensor to the second steering control module, and the second steering control module can receive the information on the first temperature and transmit information on a second temperature detected by the second temperature sensor. The first and second steering control modules can transition according to the information on the first and second temperatures, and the first steering control module or the second steering control module can control a steering motor.

A turning control device includes: a target steering angle calculation unit configured to calculate a target steering angle of a turning mechanism, based on a second steering angle of a steering mechanism; a steering angular displacement calculation unit configured to, when a third steering angle, the third steering angle being either a first steering angle of the turning mechanism or the second steering angle, is in a range from a maximum steering angle that the third steering angle can take to a first threshold steering angle, calculate a steering angular displacement of the third steering angle with the first threshold steering angle used as a reference; a steering angle correction value calculation unit configured to calculate a steering angle correction value according to at least the steering angular displacement; and a corrected target steering angle calculation unit configured to correct the target steering angle with the steering angle correction value.

A steering control device includes: an absolute steering angle detecting unit configured to detect an absolute steering angle; and a current command value calculating unit configured to calculate a current command value corresponding to a target value of the motor torque output from the motor. The current command value calculating unit is configured to perform partial release control for decreasing a correction value of the current command value due to execution of the end contact relaxation control when a vehicle is tried to be turned at the time of execution of the end contact relaxation control. The current command value calculating unit is configured to stop the partial release control when the current command value which is calculated at the time of execution of the partial release control is a value which is not affected by decreasing the correction value based on execution of the partial release control.

An electric power steering system. The system includes a steering rack having a first end and a second end and at least one damper coupled to one of the first end and the second end. The system also includes an electronic controller configured to determine if the damper has been destroyed based upon a sensed steering angle being above a maximum steering angle threshold or based upon a received signal from an electrical circuit enclosed within the at least one damper.

A vehicular control device includes a determining unit configured to determine whether an absolute value of a steering angle as a rotation angle of a steering wheel exceeds a first threshold value, an estimating unit configured to estimate a lithium deposition amount as an amount of lithium metal deposited on the lithium-ion battery by regenerative current flowing into the lithium-ion battery, based on vehicle information obtained from the vehicle, when the determining unit determines that the absolute value of the steering angle exceeds the first threshold value, and a reporting command unit configured to give a command to report that the vehicle is in a first state, based on the lithium deposition amount estimated by the estimating unit.

A haptic feedback mechanism for steering by wire system includes a motor. Electronic circuitry includes a node and switches for controlling the motor. A voltage sensor at the node and a motion sensor for the DC motor feed a motor control logic module that is operative to: determine if the voltage at the node is above a predetermined threshold; determine if the input motion is above a predetermined speed; and change the switches into an overcurrent protection mode if the voltage is above the predetermined threshold or the input motion is above the predetermined speed. In overcurrent protection mode, electrical power, generated by the input motion, passes through resistance and/or the motor to dissipate while maintaining haptic feedback. An endstop mechanism includes a position sensor coupled to the haptic feedback mechanism for detecting an angular position of the motor to increase feedback torque near an endstop of the motor.

An electric power steering device including: a control rotational displacement calculation unit configured to calculate a control rotational displacement when a steering angle of the steering system is in an angular range from a maximum allowable steering angle for the steering system to a predetermined threshold steering angle; a control steering angle shifting unit configured to calculate the control rotational displacement corrected by a correction amount based on one of the steering torque and rack axial force and a sign of one of the control rotational displacement and the steering angle as a shift control steering angle; and a feedforward control unit configured to output a second current command value based on the shift control steering angle and steering velocity. An assist control is controlled with a third current command value calculated by adding the second current command value to the first current command value.

Technical solutions are described for controlling operation of a motor using a controller to: energize the motor to rotate driveshaft and a worm; drive a worm gear by the worm; stop the motor from rotating the driveshaft in response to the worm gear rotating to a given one of a plurality of first stop positions; and change the given one of the first stop positions to another one of the first stop positions. A method for controlling a machine comprises: rotating a driveshaft by a motor; driving a worm gear by a worm to cause the worm gear to rotate; stopping the motor from rotating the driveshaft in response to the worm gear rotating to a given one of a plurality of first stop positions; and changing the given one of the first stop positions to another one of the first stop positions.

The present disclosure relates to an apparatus and a method for controlling an electric power steering motor, and the apparatus may include: a transceiver configured to receive information on a steering angle and information on an electric power steering motor and to transmit a control signal to the electric power steering motor; a motor operation determiner configured to recognize a rack stroke range and to determine whether a motor-limitation mode must be initiated or terminated based on the received information on the steering angle and electric power steering motor; and a motor control signal generator configured to generate a control signal corresponding to the determined initiation or termination of the motor-limitation mode.