Abstract:
A system for correcting steering wheel angle errors of a motor vehicle of the present disclosure may include a steering wheel angle sensor, an actuator angle sensor, and at least one of a wheel speed sensor and a lateral acceleration sensor. The system may further include a controller configured to receive signals from the steering wheel angle sensor, actuator angle sensor, and at least one of the wheel speed sensor and lateral acceleration sensor. The controller may be configured to calculate a correction angle based on the signals, and adjust a steering wheel angle of a steering wheel, as observed by a driver of the motor vehicle, based on the correction angle.
Abstract:
A steering system includes a steering shaft an electric motor that assists a steering component; a torque detection device that generates a first detection signal according to a steering torque; and a compensation sensor that generates a second detection signal according to a magnetic flux around the steering shaft and its surrounding structure. In the steering system, an output signal, in which an influence of the magnetic field around the steering shaft and its surrounding structure is reduced, is generated based on a signal correction computing equation based on information on correlation between the first detection signal and the second detection signal. Then, in the steering system, the electric motor is driven based on the output signal.
Abstract:
There is provided an electric power steering apparatus which includes a monitoring/controlling means that monitors a failure of a CPU, and controls a drive signal for driving a motor at the time of the failure of the CPU, wherein the monitoring/controlling means has a first control mode for suspending driving of the motor, and a second control mode for continuously controlling the motor with a provisional drive signal, in place of and for restricting the drive signal from the CPU; and wherein, when the monitoring/controlling means detects the failure of the CPU, the monitoring/controlling means selects the second control mode to thereby continue controlling the motor with the provisional drive signal in place of the drive signal from the CPU, and then selects, after the controlling in the second control mode, the first control mode to thereby suspend driving of the motor.
Abstract:
A stimulus-based steering sensor device and a method for the same are disclosed. The sensor device comprises at least one driving wheel, a processor, two driven wheels, and two resolvers. The processor generates a stimulus signal and has a signal-angle lookup table. The driving wheel contacts two driven wheels. When following the rotation of a steering column, the driving wheel drives two driven wheels to rotate at different speeds. Two resolvers connect with the processor, respectively engage with two driven wheels, receive the stimulus signal, and respectively output two first sinusoidal signals to the processor according to the rotational speeds of two driven wheels. The processor analyzes two first sinusoidal signals to obtain two second sinusoidal signals having different periods, and uses the second sinusoidal signals and the signal-angle lookup table to obtain a first absolute angle value of the rotation of the steering wheel.
Abstract:
A torque detection device includes a yoke unit. The yoke unit includes a first magnetic yoke and a second magnetic yoke. The first magnetic yoke and the second magnetic yoke each are formed of a strip-shaped soft magnetic plate. The first magnetic yoke has yoke proximity portions and yoke distant portions that are formed by bending the soft magnetic plate. The second magnetic yoke has yoke proximity portions and yoke distant portion that are formed by bending the soft magnetic plate. The distance between each of the yoke proximity portions and a permanent magnet is shorter than the distance between each of the yoke distant portions and the permanent magnet.
Abstract:
A torque sensor system having an index function and ascertaining a torque between an input shaft and an output shaft connected to each other via a torsion bar, includes: a magnetic unit having a magnetic pole wheel for generating a magnetic field, the magnetic unit being rigidly connected to one of the two shafts; a flux ring unit having a flux ring system for converting and conducting the magnetic flux generated by the magnetic unit, the flux ring unit being rigidly connected to the other shaft; and a sensor unit having at least one first magnetic field-sensitive sensor element for sensing changes in the magnetic flux through the flux ring system, the sensor unit being mounted in a stationary manner relative to the flux ring unit. The index function is implemented with the aid of an index magnet and a further magnetic field-sensitive sensor element.
Abstract:
A steering operation force detection device for a steering wheel including a steering wheel rim having a right-side rim section and a left-side rim section. The device includes load cells that detect six component forces of the steering operation force acting on the right-side rim section and the left-side rim section consisting of forces in three axial directions and moments about three axes. The device includes a steering angle detection sensor that detects a steering angle of the steering wheel, and an inertial force component correcting unit that derives an inertial force component acting on the right-side rim section and the left-side rim section due to rotation of the steering wheel, based on an amount of displacement of the steering angle detected by the steering angle detection sensor, and that corrects the component force detected by the load cells to eliminate an effect of the derived inertial force component.
Abstract:
A power steering assist system for a hand-steered pallet truck includes a joint assembly having a pivot joint, handle biasing mechanism, and a torque sensing arrangement. The pivot joint includes a pair of needle bearings and pivot pin disposed within a pivot block that provides a flexible connection between a handle and a tiller arm. The handle biasing mechanism includes a cantilevered beam spring and two cam rollers that resists an operator steering force applied to the handle and further, centers the handle with respect to the tiller arm after the force is released. The torque sensing arrangement includes a magnet and a non-contact magnetoresistive (MR) sensor that measures movement of the handle relative to the tiller arm which is used to determine operator steering intent, i.e., the amount of steering force applied to the handle. The MR sensor provides accurate torque measurements regardless of the angle of the tiller arm. The steering assist system further includes a driving unit with a steerable drive wheel, and a servomotor. The amount of steering assist provided by the servomotor to the drive wheel is at least partially determined based on the measured operator steering intent.
Abstract:
Disclosed herein are a steering torque and steering angle measurement apparatus, the present invention including a stator fixed to an output shaft, a magnet disposed at the inner part of the stator and being fixed to an input shaft, a torque sensor measuring a steering torque by sensing a magnetic field produced between the stator and the magnet, and a steering angle signal generation part measuring the steering angle by outputting an ON signal ordinary times and outputting an OFF signal at each preset rotation duration of the output shaft when the output shaft rotates, thereby reducing a component number, simplifying a manufacturing process and saving a cost price.
Abstract:
Two magnetic flux collecting rings are installed into a corresponding position axially located between two magnetic yokes. The magnetic flux collecting rings collect a magnetic flux from the magnetic yokes. The magnetic flux collecting rings at least partially overlap with the magnetic yokes in a view taken in the axial direction.