The present embodiments allow for stability and reliability, enhanced responsiveness and output performance, reduced noise, a better steering feeling, and component and cost savings.

A position detection device for detecting a position of a moving member moving forward and backward in a predetermined moving direction is provided with a detection object provided at the moving member, a substrate provided with an excitation coil for generating a magnetic field in an area including the detection object, and a detection coil being interlinked with a magnetic flux of the magnetic field, a power supply unit for supplying an alternating current to the excitation coil, a calculation unit that calculates the position of the moving member based on an output voltage of the detection coil, and a magnetic field diffusion suppression member for suppressing a spread of a magnetic field generated by energization to the excitation coil.

The present disclosure relates to a rear-wheel steering system and a controlling method thereof. The rear-wheel steering system includes: a rack configured to transmit a driving force generated from a rear-wheel steering motor to rear wheels; a first correction module configured to, when an engine is started, detect a position of the rack using a displacement sensor and calculate a first correction value that is a difference between the detected position and a neutral position; a second correction module configured to, when the engine is started, detect a position of the rack using a motor position sensor that detects a rotation angle of the rear-wheel steering motor and calculate a second correction value that is a difference between the detected position and the neutral position; a comparison determiner configured to compare the first correction value and the second correction value to determine whether the displacement sensor has malfunctioned; and a steering controller configured to control an operation of the rear-wheel steering motor. Accordingly, it is possible to determine whether an error occurs in the displacement sensor and to return the rack to the neutral position even when the error has occurred in the displacement sensor.

A device for determining steering wheel rotation information, which comprises a linear motion transforming element connected to a steering column of a steering wheel for transforming rotation of the steering wheel into a linear movement, and a processing element electrically connected to the linear motion transforming element for determining steering wheel rotation information based on the linear movement transformed by the motion transforming element.

Self-propelled vehicles that include swiveling caster wheels and independent drive wheels are disclosed. The self-propelled vehicles are selectively steered in a caster wheel steering mode or a drive wheel steering mode. The vehicle includes a steering position sensor to measure the position of the steering system. A control unit varies the rotational speed of first and second drive wheels based at least in part of the signal from the steering position sensor.

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.

A method and system for controlling a lane change maneuver of an autonomous vehicle. The method includes detecting a feature of a road surface with a sensor and determining, at an electronic processor, a road camber of a target lane based on the feature. The target lane is a traffic lane targeted for a lane change maneuver by the autonomous vehicle. The method further includes determining a lateral compensating force based on the road camber and applying the lateral compensating force, by the electronic processor, during the lane change maneuver.

A steering control apparatus, according to an embodiment, may include: a detecting unit configured to detect the angle of a pinion gear that is positioned in the front wheel, a column torque, and a motor current; a frequency estimating unit configured to estimate a road surface frequency that is generated by the road on which the vehicle travels based on at least one of the angle of the pinion gear, the column torque, or the motor current; a rack force estimating unit configured to estimate a rack force based on at least one of the angle of the pinion gear, the column torque, or the motor current; and a control unit configured to extract road surface information that is contained in the rack force based on the road surface frequency and configured to control a steering apparatus based on the road surface information and the rack force.

A steering apparatus includes a steering wheel provided in a vehicle, a feedback motor including a rotation shaft connected to the steering wheel, an angle sensor configured to output an angle signal corresponding to rotation displacement of the steering wheel, a rack bar connected to a rotation shaft of the wheel provided in the vehicle, a steering motor including a rotation shaft connected to the rack bar, a position sensor configured to output a position signal corresponding to linear displacement of the rack bar assembly, and a processor configured to control the steering motor to linearly move the rack bar based on the angle signal, identify a rack force applied to the rack bar based on the position signal, and control the feedback motor to apply a feedback torque corresponding to the rack force applied to the rack bar to the steering wheel.

In some implementations, a monitoring system may include a steering system of a machine, a sensor configured to detect movements of the steering system that are indicative of a steering angle of the machine, and a controller. The controller may be configured to monitor, via the sensor, the steering angle of the machine. The controller may be configured to determine, based on monitoring the steering angle, that the steering angle satisfies a threshold that is indicative of the steering angle being excessive for an operation of the machine. The controller may be configured to cause, based on the steering angle satisfying the threshold, the machine to provide an indication that the steering angle is excessive.