A stroke sensor that allows adjustment of the magnetic field distribution without changing the positions of the magnets is provided. Stroke sensor 1 has magnets 2A, 2B, and sensor 3A that detects a magnetic field that is generated by magnets 2A, 2B. Magnets 2A, 2B are movable relative to sensor 3A in first direction X. Magnet 2A has surface 5A that faces sensor 3A in second direction Z, magnet 2B has surface 5B that faces sensor 3A in second direction Z, and surface 5A and surface 5B have different polarities. A position in first direction X at which magnetic field intensity in second direction Z is zero is positioned between reference axis RA and magnet 2B. Reference axis RA is parallel to second direction Z and passes through middle point MP of minimum section S that includes magnets 2A, 2B in first direction X.

The present disclosure relates to a steering control apparatus and method of the steer-by-wire system including a sensing information collector for collecting at least one of sensing information on a steering or sensing information on a rack, a motor operation determiner for determining a start of a motor limiting mode for a reaction force motor and an end of the motor limiting mode for the reaction force motor which provides a reaction torque to a steering wheel based on the collected sensing information, a control signal generator for generating a control signal corresponding to the start of the motor limiting mode or the end of the motor limiting mode based on the determined result, and a control signal output for outputting the generated control signal to the reaction force motor.

A position detection device is configured to detect a position of a moving member moving backward and forward in a predetermined moving direction. The position detection device is provided with a conductive detection member attached to the moving member, and an exciting coil and a detection coil that are arranged extending in the moving direction of the moving member and facing the conductive detection member. The conductive detection member includes a recessed portion recessed in a direction away from the exciting coil and the detection coil. A voltage is induced in the detection coil by a current flowing in the conductive detection member due to a magnetic field generated by the exciting coil, and a magnitude of the voltage induced in the detection coil varies with a position of the recessed portion relative to the detection coil. A vehicle steering device is provided with a shaft, a housing, and the position detection device.

Disclosed herein an apparatus for detecting a steering angle. In accordance with an aspect of the present disclosure, an apparatus for detecting a steering angle includes a pinion shaft coupled to a rack housing in which a rack bar is installed, the pinion shaft on which a pinion gear meshing with a rack gear is formed; a magnet disposed at one end of the pinion shaft and configured to rotate together with the pinion shaft; a printed circuit board (PCB) disposed at a predetermined distance from the magnet and including a magnetic sensor for detecting a rotation angle of a steering wheel connected to the pinion shaft; and a connector connected to the PCB to transmit a detected value measured by the magnetic sensor to an electronic control unit (ECU).

A linear actuator for a steer-by-wire system including a component, in particular an axle or a shaft, that can be moved along a linear trajectory, and including a measuring device for determining a position of the component. The measuring device has a coil for inductively determining the position of the component, and the coil is arranged coaxially relative to the linear trajectory of the component.

The present embodiments relate to a steering control device and method. A steering control device may include a communication device configured to receive a steering angle sensing signal from a steering angle sensor installed at a lower part of a rack-pinion gear, a detector configured to detect whether of an inflow of moisture into a steering device based on the steering angle sensing signal and generate moisture detection information if the inflow of moisture is detected, and a controller configured to perform a risk prevention control to prevent risk due to the inflow of moisture based on the moisture detection information.

A steer-by-wire system or similar system includes a first steering input device having a mechanical steering element that is connected to a shaft of a first actuator and has a first position measuring device measuring the position of the element; a second steering input device; a driving actuator for an element to be controlled by the system having a second position measuring device measuring the position of the element; and an electronic control unit receiving input signals from the first and second position measuring devices and simultaneously from the first and second input devices and providing control signals for the first actuator and the driving actuator, and handover signals from external systems. The electronic control unit calculates an output signal for the first actuator that causes the steering element to take a position that is determined by the input signal of the second input device within less than 0.1 sec.

Systems and methods for controlling an electric power steering (EPS) motor of an EPS system of a vehicle are provided. A steering rack position sensor detects a linear position of a steering rack linear of the EPS system and a suspension travel sensor detects a suspension travel of the vehicle. An EPS controller has a processor and a memory. The EPS controller is configured to control the current draw of the EPS motor. The EPS controller is further configured to determine an EPS motor output torque based on the linear position of the steering rack and the suspension travel, and to limit the current draw of the EPS motor based on the EPS motor output torque.

Technical solutions are described for disturbance feedforward compensation technique for improving the disturbance rejection properties of a closed loop position control system using a cascaded control structure with an inner velocity and outer position control loops. According to one or more embodiments, a system includes a position controller that receives an input rack-position command, and a measured rack-position, and computes a velocity command based on a difference in the input rack-position command and the measured rack-position. The system further includes a velocity controller that receives the velocity command, and a measured motor velocity, and computes an input torque command based on a difference in the velocity command and the measured motor velocity. The system adjusts a position of a rack by generating an amount of torque corresponding to the applying the input torque command to a motor.

A hands-off state detection method of a vehicle includes determining a difference between a pinion angle and a column angle of a motor-driven power steering (MDPS) system of the vehicle, and determining a hands-off state of a steering wheel of the vehicle based on the difference between the pinion angle and the column angle.