In a drive assist system, a map data acquiring section acquires a forward road shape and a rearward road shape. The forward road shape represents a road shape at a forward position in front of a current position of an own vehicle on a road on which the own vehicle drives. The rearward road shape represents a road shape at a rearward position on the road. The rearward position is behind the forward position and in front of the current position of the own vehicle on the road. An assist control calculation section determines steering characteristics of the own vehicle at the target position located between the forward position and the rearward position based on the forward road shape and the rearward road shape, and adjusts a steering angle of the own vehicle on the basis of the determined steering characteristics of the own vehicle.

A steering system is provided with a control unit (15) configured to determine a target steered angle (αt) according to a steering angle (β) of a steering shaft (18) which is fitted with a steering wheel (19) and drive a steering actuator so as to cause the steered angle (α) to coincide with the target steered angle, and to determine a target reaction force (Tt) according to a steered state of the wheels and drive a reaction force actuator (13) so as to cause the reaction force to coincide with the target reaction force. The control unit is configured to correct an output of the steering angle sensor in such a manner that a geometric steering center of the steering wheel coincides with a mechanical steering center of the steering shaft upon receiving a prescribed input (S) from a manual input switch (37).

A steering control device includes a control unit. The control unit is configured to execute a control angle calculation process, an angle feedback process, and a standard value adjustment process. The control angle calculation process is a process of calculating a control angle as an absolute angle relative to a standard value, and the angle feedback process is a process of performing feedback control on the control angle, and the standard value adjustment process is a process of adjusting the stored standard value. The standard value adjustment process includes a process of, when, in a straight-ahead state, the control angle deviates from a value showing the straight-ahead state, adjusting the standard value such that the deviation of the control angle from the value showing the straight-ahead state decreases.

The rollover prevention apparatus defines an adaptive steering range limiting device comprising a control unit and a pair of opposing unidirectional brake assemblies mounted to a steering column position detection disc. The rollover prevention apparatus prevents the steering wheel of the vehicle from being turned beyond the threshold of vehicle rollover, but otherwise does not restrict the rotational range of motion of the steering wheel of a vehicle.

A driving assistance apparatus predicts an appropriate operation amount which is an operation amount performed by a driver in correspondence with the external environment, and sets the appropriate operation amount range including the appropriate operation amount, an appropriate operation amount range including the appropriate operation amount, and changes the reaction force characteristics of the operation device when it is determined that the operation amount of the driver corresponding to the prediction time point of the appropriate operation amount is not included in the appropriate operation amount range.

A system and method for differential traction drive and steering axis coordination for an autonomous mower or other turf device includes initiating a steering motion based on determining a target forward speed and a steering rotational speed, calculating a left wheel speed and a right wheel speed, and applying the left and right wheel speeds, wherein the steering rotational speed is driven by a steering motor and the traction wheels associated with the autonomous mower, and the left and right wheel speeds are based on the target forward speed, a distance from a steering axle to the center of the respective wheel, and the steering rotational speed.

A steering control device includes a control unit configured to perform a calculation based on angle information and to control the operation of a turning section based on a turning control amount. The angle information is obtained by relating the turning control amount for operating the turning section to a steering angle that is an angle by which a steering wheel is steered. The control unit includes a speed increase ratio calculation unit configured to calculate a speed increase ratio based on state variables, and an angle information calculation unit configured to calculate the angle information by converting the steering angle using the speed increase ratio obtained by the speed increase ratio calculation unit.

A steer-by-wire control system adapted for use with a material handling vehicle such as a forklift includes a controller programmed to receive input indicative of a desired direction of travel of the material handling vehicle and to control an actuator coupled with the steered wheels of the material handling vehicle to change the direction of travel of the vehicle.

Provided is a steer-by-wire steering system for a vehicle that can prevent the vehicle from suddenly accelerating in a direction which the drive did not anticipate even when the steering angle of the steering member was changed while the vehicle was parked. When the steered angle deviates from the prescribed relationship to the steering angle (ST2: Yes), immediately or upon satisfaction of a trigger condition, the control unit drives the steering actuator to bring the steered angle to come closer to the prescribed relationship to the steering angle (ST16, ST17, ST20, ST21), and sets an upper limit to a speed or an acceleration of the vehicle (ST7).

In a control device to control a motor in an electric power steering apparatus including the motor, processor executes, according to a program calculation of a target assist torque by performing proportional integral (PI) control based on a target steering wheel angle and a steering angle, and control of the motor based on the target assist torque. A gain of an integrator used for integral (I) control of the PI control is variable.