A steering controller includes processing circuitry configured to execute a torque control process that calculates a steering-side operation amount, an angle feedback control process that calculates an angle-side operation amount, and an operation process that operates a drive circuit of an electric motor to adjust torque of the electric motor to a torque command value. The processing circuitry is further configured to execute a switch process that switches, when determining that a controllability of the electric motor is less than or equal to a predetermined efficiency, the torque command value from a value based on the angle-side operation amount to a value based on the steering-side operation amount instead of the angle-side operation amount.

A steering control device includes an electronic control unit configured to calculate a d-axis current command value and a q-axis current command value for a motor having three phases configured to generate drive power applied to a shaft interlocked with turning wheels, to convert detected current values in the phases of the motor to a d-axis current value and a q-axis current value, and to perform feedback control. The electronic control unit is configured to perform field weakening control for setting the d-axis current command value to a negative value based on a rotation speed of the motor, to determine whether the motor is in a regenerative state, and to calculate the d-axis current command value according to the regenerative state of the motor when the electronic control unit determines that the motor is in the regenerative state.

Disclosed herein is a steering apparatus. According to one aspect of the present disclosure, the steering apparatus includes a housing in which a rod slidably provided in an axial direction for wheel steering is accommodated and a sensor coupler passing through an inner surface and an outer surface to expose a part of the rod is provided, a rotation preventer coupled to the rod through the sensor coupler to be moved together with the rod and supported in a width direction of the housing to limit rotation of the rod, a damper coupled to the rotation preventer to be disposed between the sensor coupler and the rotation preventer, a magnet holder coupled to the rotation preventer to be moved together with the rod and provided with a magnet, and a sensing unit coupled to the sensor coupler and including a sensor configured to sense a position of the magnet.

The present disclosure relates to a steer-by-wire type steering apparatus. According to present embodiments, in the steer-by-wire type steering apparatus, when a driver generates a larger steering torque than a reaction torque of a reaction motor in a steering shaft, rotation of the steering shaft can be prevented.

Steer-by-wire steering systems for vehicles and related methods are described herein. An example steer-by-wire steering system includes a steering wheel angle sensor to detect a current steering wheel angle (α) of a steering wheel of the motor vehicle, a steering actuator to generate a variable steering torque on a steerable wheel of the motor vehicle, a steering angle sensor to detect a current steering angle (β) of the steerable wheel, and a steer-by-wire controller to process signals from the steering wheel angle sensor and the steering angle sensor and control the steering actuator based on the signals. The steer-by-wire controller is configured to vary a transmission ratio between a change in the steering wheel angle (α) and a change in the steering angle (β).

A steering control apparatus for a steering system includes a controller. The controller sets a limit value to less than or equal to a steering angle limit value, the limit value being an upper limit of an absolute value of a torque command value, and controls a motor such that a motor torque follows the torque command. When the absolute value of a rotation angle of a rotary shaft exceeds a steering angle threshold, the controller computes a damping control amount such that the damping control amount increases with an increase in an excess of an angular velocity of the rotary shaft over a first upper limit angular velocity. The controller computes the torque command value based on a value obtained by combining the basic command value and the damping control amount such that an absolute value of the basic command value is reduced.

A steering system includes: a steering gear body, where the steering gear body includes a steering gear input shaft and a gear shaft; a decoupling mechanism, where the decoupling mechanism is configured to decouple the steering gear input shaft from the gear shaft or couple the steering gear input shaft to the gear shaft; and a limiting mechanism, where the limiting mechanism is configured to limit a range of a steering angle of the steering gear input shaft, in response to that the steering gear input shaft is decoupled from the gear shaft or that the steering gear input shaft is coupled to the gear shaft.

A apparatus for controlling a steer-by-wire system including: a reaction torque generator configured to generate reaction torque as a calculated value of steering reaction torque applied to a steering wheel; a driver torque estimator configured to detect a driver torque estimation value as an estimated value of driver steering torque; a speed controller configured to generate a motor torque command value of a motor-driven power steering system; a torque adjuster configured to calibrate the motor torque command value and the reaction torque based on the driver torque estimation value, and output final active return torque and final reaction torque; and a target current generator configured to generate a target current for motor control by using the final active return torque and the final reaction torque, inputted from the torque adjuster, and input the generated target current to a motor.

A steering system and method can determine one or more position-related characteristics of a steering column of a machine, determine that the one or more position-related characteristics indicate that a resistive force is to be applied to the steering column, and control operation of an electric motor to apply the resistive force to the steering column, wherein a mechanical end stop can be provided to restrict rotation of the steering column. One or more virtual stops may be set to limit rotation of the steering column by way of controlling the operation of the electric motor to apply the resistive force.

A method for actuating a vehicle steering actuator which is coupled to a steering gear, comprising: providing an end stop return function with which a first control variable for the vehicle steering actuator can be ascertained, on the basis of which a force that returns the steering gear in the direction of a defined position can be at least partially generated with the vehicle steering actuator; ascertaining whether the steering gear falls below a limit distance from an end stop; and if this is the case: actuating the vehicle steering actuator on the basis of the first control variable ascertained with the end stop return function, which control variable has a value above a threshold value; wherein, if the limit distance is not fallen below, no control variable is ascertained with the end stop return function or a control variable with a value not exceeding the threshold value.