A terminal position learning unit includes a first storage unit configured to store a steered position positioned farthest from a neutral position of a turning mechanism within a range of a steered position detected by a position detection unit when rotational force applied to the turning mechanism is less than or equal to a first predetermined value, a second storage unit configured to store a steered position positioned farthest from the neutral position within a range of a position to which a steered position detected by the position detection unit is shifted in a direction toward the neutral position by a second predetermined value, and a third storage unit configured to store, as a terminal position stored by the terminal position learning unit, one of the steered positions stored in the first storage unit and the second storage unit positioned farther from the neutral position than the other.

A flat towed vehicle includes a battery and wheels and a supplemental fuse. A transfer case generates a transfer case status signal an electric power steering system coupled to the wheels and the battery through the supplemental fuse. The electrical power steering system has a tow mode and a driven mode. The electric power steering system enters the tow mode when the supplement fuse communicates battery power to the electrical power steering system and the transfer case status signal corresponding to a neutral position.

A steering control device for a vehicle with an aerial work platform 1 in the embodiment a traveling body capable of traveling with a steering wheel, a work platform 30 provided thereon, a steering dial 42, which is biased to be located at a neutral position in a non-operation status, a steering angle detector 62, a steering cylinder 17, and a controller 50 for controlling an operation of the steering cylinder 17. The controller 50 controls the steering cylinder 17 so that a steering angle of the steering wheel becomes a target steering angle corresponding to a steering position of the steering operation tool. As far as a steering angle of the steering wheel detected by the steering angle detector is kept within a predetermined angle range including a neutral steering angle, the steering control unit make a steering control to stop the steering actuator and to maintain the present steering angle of the steering wheel when the steering operation tool returns to the neutral position.

A present steering position of a manually actuatable steering unit of the motor vehicle is determined based on sensor data. A steering command is generated based on the present steering position of the steering unit. Then, based on sensor-detected present vehicle dynamics data, it is determined whether the motor vehicle is in a straight-ahead running situation during driving operation. It is determined whether, during the straight-ahead running situation of the motor vehicle, the present steering position of the steering unit deviates from a straight-ahead running position of the steering unit for at least one of a specified time period and a specified traveling distance of the motor vehicle. A compensation steering command is generated based on the determined deviation of the present steering position of the steering unit from the straight-ahead running position. A corrected steering command is generated based on combining the compensation steering command with the steering command.

A control device includes a processor and a storage device storing a program for controlling an operation of the processor. The processor determines whether a vehicle is in a straight-ahead traveling state, based on a vehicle speed detected by a vehicle speed sensor, a steering wheel torque applied to a steering wheel, and a steering wheel angle as a rotation angle of an input shaft. The processor stores the steering wheel angle in the memory when determining that the vehicle is in the straight-ahead traveling state. The processor stores the steering wheel angle in the memory multiple times when determining that the vehicle is in the straight-ahead traveling state. The processor calculates a corrected steering angle amount from a weighted average of the steering wheel angles stored in the memory.

A steer-by-wire apparatus may include: a first rotating part rotated with a steering wheel; a second rotating part installed so as to be isolated from the first rotating part, and engaged with a first rack gear provided on a side surface of a gear bar; a sensor installed on each of the first and second rotating parts, and configured to measure at least any one of a rotation angle of the first rotating part, a rotation angle of the second rotating part and a torque value of the first rotating part; a controller configured to receive the measured value of the sensor; and a clutch configured to operate according to a control signal of the controller and synchronize rotations of the first and second rotating parts.

Embodiments disclose a system and method to automatically turn and return a steering of an autonomous driving vehicle (ADV) to a center position. According to a first aspect, a system performs a turn by applying a steering command to an autonomous driving vehicle (ADV). In response to turning, the system determines a current percentage steering, speed, and heading direction of the ADV. The system selects a steering return trajectory profile from one or more steering return trajectory profiles based on the determined speed of the ADV. The system generates a steering return trajectory based on the selection. The system controls the ADV to return a steering to a center position based on the generated steering return trajectory.

A calibration method in which, a rotation angle calculation device calculates a rotation angle based on a detection signal of a sensor, transmits rotation angle data indicating the rotation angle to a calibration device, and transmits time difference data relating to a time difference after having captured the detection signal until transmitting the rotation angle data to the calibration device, and in which the calibration device measures a rotation angle, clocks a measurement time at which the rotation angle is measured and a transmission time of transmitting or receiving the rotation angle data, and acquires calibration data of the rotation angle data by comparing the rotation angle measured at a time obtained by going back in time from the transmission time by the time difference after having captured the detection signal until transmitting the rotation angle data and the rotation angle data with each other.

System, methods, and other embodiments described herein relate to calibrating a steering wheel in a steering system of a vehicle. In one embodiment, the disclosed calibration system detects an object in front of the vehicle based on first data generated by one or more front sensors of the vehicle, detects the object to the rear of the vehicle based on second data generated by one or more rear sensors of the vehicle, determines a trajectory of the object based on the first data and output data from a steering wheel sensor, determines an estimate position of the object based on the trajectory, determines that the second data indicates a difference exists between the estimate position of the object and an actual position of the object, and determines a correction offset adjustment to apply to the output data from the steering wheel sensor based on the difference.

An alignment tool for a work vehicle includes: an axle housing connecting portion having a housing mating feature configured to mount to a respective mating feature of an axle housing; and a steering knuckle connecting portion coupled with the axle housing connecting portion and having a knuckle mating feature configured to mount to a respective mating feature of a steering knuckle, the steering knuckle connecting portion being coupled to the axle housing connecting portion and angled with respect to the axle housing connecting portion such that the housing mating feature is mountable to the mating feature of the axle housing and the knuckle mating feature is mountable to the mating feature of the steering knuckle only when the steering knuckle is at a fully steered position.