An embodiment of a system of a vehicle includes a power steering system that operates as commanded by control commands, and a control module configured to receive a first control command. The control module is also configured to generate a range signal indicative of a range of command values based on a plurality of input signals, generate a second control command based on a subset of the plurality of input signals, determine whether the first control command is out of the range for longer than a predetermined duration of time, and send the second control command to the power steering system in response to determining the first control command is out of the range for longer than the predetermined duration of time.

Technical solutions are described for estimating handwheel angle of a steering wheel of a vehicle based on road wheel rotational speed data. In one or more examples, the technical solutions are used when the vehicle does not have a sensor to measure the handwheel angle, or if the handwheel angle sensor is faulted and unable to provide data on the actual handwheel angle.

A motor control device includes temperature detection elements that are mounted on a circuit board on which a first power conversion circuit and a second power conversion circuit are mounted and are arranged at a position between the first power conversion circuit and the second power conversion circuit.

A vehicular self-diagnosis device includes first to third sensors that detect parameters to be used in steering control of a vehicle, first to third turn estimators that respectively estimate turn statuses of the vehicle based on a steering angle detected by the first sensor, vehicle behavior detected by the second sensor, and a lane curvature and a vehicle-versus-lane yaw angle of the vehicle relative to the lane curvature detected by the third sensor, an offset extractor that extracts first to third offset components respectively from signals indicating the estimated turn statuses, an offset-divergence-amount calculator that calculates a maximum divergence amount based on maximum and minimum values of the first to third offset components, and a comparison unit that compares the maximum divergence amount with a predetermined threshold value and determines that inconsistency exists among the first to third sensors if the maximum divergence amount exceeds the threshold value.

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

A hardware architecture for controlling a safety-relevant process having at least two microcontrollers for controlling the process in at least two control branches, wherein the respective microcontroller control the safety-relevant process. The microcontrollers process the data from at least one sensor, which detects the actual characteristic of the respective control branch. Between the two microcontrollers, the data of the respective sensor are exchanged and provided for each microcontroller and a check is made to determine whether the data from the sensors are consistent. In response to an inconsistency being detected, a majority decision is made and a model value used in forming the majority decision, is calculated in the microcontroller based on control commands so the control of the safety-relevant process by the microcontroller of the control branch, whose data were detected as erroneous in the majority decision, is disabled.

A dual-motor drive assembly comprising a housing, a shaft mounted to the housing, a first gear connected to the shaft, a first motor lane comprising motor an output, a motor drive-stage driving the first motor in response to a torque demand and applying a torque to the first gear, and a first position sensor generating a first motor position signal, a second motor lane comprising a motor having an output, a motor drive-stage driving the second motor in response to a torque demand, and applying a torque to the first gear, and a second position sensor generating a second motor signal, the two motor outputs engaging with the first gear such that both motors' torque output is applied to the shaft. A processor generates an estimate of the first motor position using the signal from the second sensor and the effect of any backlash in the assembly, and cross-checks first signal against the estimate to determine if one of the motor position sensors is faulty.

In a vehicular steering control device, a steer-by-wire system, and a method for controlling a steer-by-wire system according to the present invention, if an abnormality of a rotation angle sensor of a turning motor is detected, open-loop control is performed on the turning motor based on a rotation angle of a motor shaft before the abnormality of the rotation angle sensor is detected and information concerning a reaction generation device that applies reaction torque to steering wheel. Consequently, it is possible to continue control of a turning angle even if the rotation angle sensor of the turning motor fails, while suppressing an increase in system cost.

A method for determining a risk of instability of a calculation of an angle of a steering shaft of a motor vehicle can be employed where a first gear wheel is fixed to the steering shaft and cooperates with a second gear wheel and a third gear wheel, which are smaller than the first gear wheel. The number of teeth of the first gear wheel is n. The number of teeth of the second gear wheel is m. And the number of teeth of the third gear wheel is m+1. The angles and of the two smaller gear wheels are determined and the angular position of the steering shaft is calculated by evaluating the equation $=\frac{m*+\left(m+1\right)*-\left(2m+1\right)*k*}{2n},$
with being an angle of the sensor range and a whole number k given by $k=\mathrm{round}\left(\frac{\left(m+1\right)*-m*}{}\right),$ wherein the risk of instability is determined by calculation of a stability margin t according to $t=k$