A motor controller for controlling a motor includes first and second angle sensors detecting motor rotation, and first and second detection circuits detecting rotation number information based on sensor output from the angle sensors. Further, the motor controller includes a steer angle information obtainer obtaining steer angle information involving steering of a vehicle from an external sensor, which is different from the angle sensors, and an abnormality determiner determining abnormality of information that has a matching degree of lower than a preset value when post-conversion information, or value measured by the same characteristics. This information is compared with each other after conversion from the rotation number information and from the steer angle information, and is used by a control amount calculator to calculate a control amount of the motor based on the information determined as having no abnormality by the abnormality determiner.

The embodiments of the present disclosure relate to a torque data robusting device and method. Specifically, the torque data robusting device according to the present disclosure may include a sensor unit for sensing a speed of a host vehicle, a steering angle and a steering torque for a steering wheel, and a controller configured to generate, if a steering torque value is not received from the sensor unit, a compensation torque to assist an user's steering based on the steering angle and the speed of the host vehicle, determine whether the user's steering is a normal steering or a return steering according to the steering angle and a steering angular velocity, and control to generate and adjust the compensation torque according to the normal steering or the return steering.

A rotation angle detection device including: an angular position calculation unit configured to calculate angular position information representing an angular position of the motor rotation shaft based on a first sensor signal of the first sensor; an rotation number detection unit configured to detect a rotation number of the motor rotation shaft based on a second sensor signal of a second sensor and outputs rotation number information representing the rotation number; a rotation angle calculation unit configured to calculate rotation angle information indicating a rotation angle of the motor rotation shaft based on the angular position information and the rotation number information; and a power supply unit configured to stop supplying power to the first sensor, the angular position calculation unit and the rotation angle calculation unit and to supply power to the second sensor and the rotation number detection unit when the power switch is off.

Systems and methods for controlling an electric power steering system. The system includes an electric motor configured to provide a torque to a steering mechanism of a vehicle, a torsion bar torque sensor, a vehicle speed sensor, and a steering angle sensor. The system also includes an electronic controller configured to determine a failure of the torsion bar torque sensor, receive a vehicle speed from the vehicle speed sensor and a steering angle from the steering angle sensor, calculate a steering assistance torque based on the vehicle speed and the steering angle, calculate a hysteresis torque based on the steering angle, sum the steering assistance torque and the hysteresis torque to determine a turning torque, calculate a return torque and sum the turning torque and return torque to obtain an output torque, and generate a command for the electric motor to provide the output torque to the steering mechanism.

A system comprises a processor and a memory storing instructions which when executed by the processor configure the processor to estimate a rack force for a steering system of a vehicle based on current driving and environmental conditions and estimate a health of an actuator of the steering system of the vehicle. The instructions configure the processor to estimate maximum achievable angle, velocity, and acceleration for the actuator of the steering system based on the estimated rack force and the estimated health of the actuator. The instructions configure the processor to provide to the steering system a path planned for the vehicle based on the estimated maximum achievable angle, velocity, and acceleration for the actuator of the steering system.

A method of operating an electric power assisted steering system of the kind in which an electric motor applies an assistance torque to a part of the steering system as a function of an assistance torque signal, the assistance torque reducing the force required by the driver to turn a steering wheel, comprises during normal operation generating an assistance torque signal that is dependent on the torque applied by the driver, and during a fault operation in which the torque applied by the driver is not reliably known to the system generating an assistance torque signal that is derived from a first term that has a value that varies as a function of the angular position of the steering relative to a changeable datum, the angular position of the changeable datum being updated in the event that the direction of rotation of the steering changes.

The failure detection device includes: a failure detection unit configured to detect failure of a torque detection unit, the torque detection unit detecting torque applied to a rotary shaft with plural torque sensors; and a controller configured to control drive of a motor such that the motor outputs continuous torque in an event that the failure detection unit detects failure of the torque detection unit, the continuous torque continuously generating torque that is, if at least one of the plural torque sensors is working properly, detectable by the at least one of the plural torque sensors.

A control device for vehicle-mounted equipment according to the present invention includes a first sensor, a second sensor, a first microprocessor, and a second microprocessor. The second microprocessor generates a second sensor data request signal for requesting the second sensor to transmit second sensor data. The first microprocessor determines whether an abnormality has occurred in the second microprocessor based on the second sensor data or the second sensor data request signal, and based on a signal relating to information on the second microprocessor which is transmitted from a second inter-microcomputer communication unit of the second microprocessor.

A vehicle steering system, including: a steering actuator including an electric motor, a steering rod configured to steer a wheel by a steering amount, and a motion converting mechanism configured to convert a rotating motion of a motor rotation shaft into a motion of the steering rod; first and second motor rotation angle sensors configured to detect a motor rotation angle; a steering amount sensor configured to detect a motion amount of the steering rod as the steering amount; and a controller configured to execute a steering amount control and to perform detection-value inappropriateness determination in which it is determined that any one or two of a detection value of the first motor rotation angle sensor, a detection value of the second motor rotation angle sensor, and a detection value of the steering amount sensor are inappropriate based on comparison among the detection values.

An emergency steering apparatus of an MDPS (Motor Driven Power Steering) system may include: a steering angle sensor configured to sense a steering angle of a steering wheel; a vehicle speed sensor configured to sense a vehicle speed; an assist rack force detector configured to detect an assist rack force of the MDPS system using the steering angle sensed by the steering angle sensor and the vehicle speed sensed by the vehicle speed sensor; and a command current detector configured to detect a command current of a motor using the assist rack force detected by the assist rack force detector