The present disclosure relates to an apparatus and method for diagnosing a failure, which may include a motor, an inverter for driving the motor, a phase current sensor for respectively detecting a phase current supplied to the motor from the inverter, and a controller for converting the phase current detected by the phase current sensor into a current, obtaining an average value of the current in one cycle and comparing the magnitude and angle of the average value with a reference value to determine a failure of the phase current sensor.

An electric power assisted steering apparatus comprises an upper column shaft that is connected to a steering wheel of the vehicle; and a lower column shaft. A torsion bar interconnects the upper column shaft and the lower column shaft; and an electric motor is connected to the lower column shaft of the torque sensor assembly. A first sensor circuit generates a first torque signal based on angular deflection of the torsion bar, and a second sensor circuit generating a second torque signal based on angular deflection of the torsion bar, the apparatus further including: an error determining circuit which produces two error signals, each indicative of the validity of a respective torque signal, and a torque plausibility estimator which generates two plausibility signals each indicative of the plausibility of a respective one of the two torque signals.

The present invention includes: first to fourth Hall elements for detecting steering torque; a first power supply circuit for supplying power to the first and second Hall elements; a second power supply circuit for supplying power to the second and third Hall elements; and a control device including a first abnormality determining unit for determining whether first and fourth torque signals are abnormal by preparing the first torque signal output from the first Hall element with the fourth torque signal output from the fourth Hall element and a second abnormality determining unit for determining whether second and third torque signals are abnormal by comparing the second torque signal output from the second Hall element with the third torque signal output from the third Hall element. With this, even when abnormality occurs in one of the first and second power supply circuits, the abnormality determination of an output signal can be continued.

A control system for monitoring operation of an electric motor includes a plurality of position sensors configured to measure a position of the electric motor, an indirect position estimation module configured to indirectly estimate the position of the motor, and an error monitoring module. The error monitoring module is configured to perform at least one of: comparing a measured position from the plurality of position sensors to an estimated position from the sensor position estimation module, and detecting a failure of at least one of the one or more position sensors based on the comparison; and calculating a difference between the measured position from one of the plurality of position sensors and the measured position from another of the plurality of position sensors, and causing the indirect position estimation module to initiate estimation of the position of the motor based on the difference.

The present disclosure relates to an electric power steering apparatus. An embodiment of the present disclosure provides an electric power steering apparatus including a three-channel torque sensor, a three-channel motor position sensor, and a single-wound BLAC motor, and an ECU configured to control steering.

A driving support device may include, but is not limited to: a plurality of sensors is configured to detect state quantities relating to steering of a vehicle; a determiner is configured to determine whether each of the plurality of sensors is normal or abnormal; and a controller controlling execution of driving support functions for supporting a driving operation for the vehicle, in which the controller is configured to determine a control state of an executable driving support function on the basis of a result of the determination of the determiner.

A motor driven power steering apparatus includes a steering logic unit for generating a current command to operate a drive motor according to a driving condition of a vehicle, a motor speed sensor for sensing a rotation condition of the drive motor to output a motor speed, a motor control unit for receiving the current command and the motor speed from the steering logic unit and the motor speed sensor, respectively, and calculating an output voltage from a voltage table according to current-speed based on the current command and the motor speed to output a voltage command to operate the drive motor, a coordinate conversion unit for converting the two-phase voltage command outputted from the motor control unit into a three-phase voltage, and a motor driving unit for outputting the three-phase voltage converted from the coordinate conversion unit to the drive motor as a PWM voltage.

A system and a method of controlling a motor-driven power steering are disclosed. A basic steering torque assist compensation is made according to a LOAM compensation logic under a steering condition such as steering of a steering wheel and holding of the steering wheel after steering, and an additional steering torque compensation is made to reduce the basic steering torque assist compensation amount when returning the steering wheel to the center or releasing the steering wheel in a restoring direction, thereby reducing steering effort felt by a driver when returning the steering wheel to the center or releasing the steering wheel in the restoring direction, and thus maintaining proper steering effort when a torque sensor of a high-performance vehicle fails.

Methods and systems for providing rotary position sensor information. One system includes an electronic processor configured to receive a first set of signals from a first bridge circuit of a rotary position sensor and receive a second set of signals from a second bridge circuit of the rotary position sensor. In response to the receipt of the first set of signals from the first bridge circuit stopping, the electronic processor is also configured to identify a fault associated with the first bridge circuit. The electronic processor is also configured to receive a pulse signal and determine a rotary angle based on the pulse signal and the second set of signals from the second bridge circuit. The electronic processor is configured to generate an output torque value based on the rotary angle for controlling a motor.

Methods for providing steering assistance for an electromechanical steering system having a redundant control unit with a primary and a secondary control path. Respective primary and secondary control paths each have a computing unit, gate driver module, and power module. The method includes detecting an applied steering torque; calculating a primary and secondary motor target torque in the primary computing unit as a function of the applied steering torque; transmitting the primary motor target torque to a primary motor controller of the primary computing unit; determining primary motor currents to operate a primary electric motor or a primary winding group of the electric motor in the primary motor controller; transferring the secondary motor target torque from the primary computing unit to a secondary motor controller and determining secondary motor currents for operation of a secondary electric motor or a secondary winding group of the electric motor.