Abstract: A method for controlling a heavy-duty vehicle to follow a reference path (P), comprising determining a goal point along the reference path to be used as a steering reference from a vehicle location in vicinity of the path, where the goal point is distanced along the path by a preview distance measured from a reference location associated with the vehicle location, determining a direction w1 of a first flow field associated with the reference path, determining whether a lateral deviation of the vehicle location from the reference path exceeds a threshold lateral deviation, and controlling the vehicle in accordance with the direction w1 of a first flow field if the lateral deviation exceeds the threshold lateral deviation, and otherwise controlling the vehicle in accordance with the direction wpipe of a pipe flow substantially parallel to the reference path or in accordance with an optimization-based path.

Abstract: A driver assist system for avoiding hunting of an assist control. The driver assist system comprises: an edge line detector that detects edge lines of a predetermined lane; a limit steering angle detector that detects a limit steering angle at which a vehicle reaches the edge line in a predetermined time; an actual steering angle detector that detects an actual steering angle from a reference position; a comparator that compares the actual steering angle with the limit steering angle; a steering assistor that establishes a steering reaction force when the actual steering angle exceeds the limit steering angle; a determiner that determines a satisfaction of a condition relating to a lane width; and an adjustor that imaginarily sets the right edge line and the left edge line on the center of the lane, and calculate the limit steering angle based on the imaginary edge line upon the satisfaction of the condition.

Abstract: An apparatus of determining a target steering angle, may include: a feedforward steering angle calculator configured for determining a feed forward steering angle reflecting a yaw moment generated by torque vectoring during turning driving of an electric vehicle in autonomous driving; and an adder configured for obtaining a target steering angle by adding the determined feedforward steering angle to a feedback steering angle, the feedback steering angle being a steering angle measured through a steering angle sensor.

Abstract: Disclosed herein are an apparatus and method for adaptive autonomous driving control. The apparatus includes memory in which at least one program is recorded and a processor for executing the program. The program may perform control of a target vehicle by converting a theoretical control value based on a vehicle control algorithm into a hardware-dependent control value, which is dependent on the platform or hardware of the target vehicle, and may modify at least one parameter or a conversion equation for conversion of the hardware-dependent control value such that an error is minimized based on the difference between a response value according to the control of the target vehicle and a control value.

Abstract: The present invention obtains a controller capable of handling special travel made by a straddle-type vehicle. The present invention also obtains a rider-assistance system including such a controller. The present invention further obtains a control method capable of handling special travel made by a straddle-type vehicle. Surrounding environment information of a straddle-type vehicle (100) is acquired on the basis of output of at least one surrounding environment detector (11). Then, based on the surrounding environment information, presence or absence of slip-by travel between rows of vehicles made by the straddle-type vehicle (100) is analyzed. As a result, rider-assistance operation that corresponds to the analysis result is executed.

Abstract: A steering wheel hands-on/off detection device includes: an imaging part provided in a vehicle and configured to capture a motion of a driver; a dynamic sensor configured to measure a dynamics motion of the vehicle; an image processor configured to process an image obtained from the imaging part; and a vehicle safety controller. The image processor includes a driver monitoring part configured to derive a behavior type of the driver from the image and a keypoint extraction part configured to extract keypoints of the driver. An optimal torque and an optimal contact force are applied to the keypoints of the driver so that a driver dynamics model optimally controlled to follow a position of the driver is applied. The vehicle safety controller configured to determine steering wheel hands-on/off on the basis of a magnitude of a force applied to the steering wheel, which is estimated from the driver dynamics model.

Abstract: A proactive pedal algorithm is used to modify an accelerator pedal map to ensure the deceleration when the accelerator pedal is released matches driver expectation. Modifying the accelerator pedal map provides the driver of a vehicle the sensation that the vehicle resists moving when travelling in dense scenes with potentially high deceleration requirements and coasts easily in scenes with low deceleration requirements. The accelerator pedal map is modified based on a scene determination to classify other remote vehicles as in-lane, neighbor-lane, or on-coming.

Abstract: The disclosure relates to a steering control device and method for a vehicle and may provide a vehicle steering control device and method capable of doing exercise using the steering wheel of the vehicle to easily do exercise inside the vehicle while driving and preventing drowsy driving.

Abstract: Based on image information captured by a camera sensor, a deviation degree determination unit determines the degree of deviation when a situation occurs in which a vehicle V deviates from its lane. Vibration pattern information according to the degree of deviation is transmitted to the wearable device, and a vibration device contained in the wearable device is vibrated according to the vibration pattern information. As a result, the vibration device can be vibrated in a vibration pattern according to the degree of deviation from the lane without making the driver feel annoyed and making passengers feel uncomfortable.

Abstract: The vessel azimuth control apparatus has an azimuth control unit that outputs a steering-angle command signal for making a vessel turn to an azimuth to which the vessel should travel, based on an azimuth command signal generated by an azimuth command generation unit, a yaw-angle signal, and a yaw-angular-velocity signal, a steering-angle control unit that controls a rudder based on the steering-angle command signal, and a control gain adjustment unit that has a calculation feasibility determination unit for determining feasibility of calculation of frequency responses, based on the yaw-angle signal and the yaw-angular-velocity signal, and that calculates respective frequency responses of the yaw-angle signal and the yaw-angular-velocity signal for the steering-angle signal, when the calculation feasibility determination unit determines that calculation of frequency response are feasible, and then adjusts a control gain of the azimuth control unit.

Abstract: A method and device are disclosed for improved object detection in an area surrounding a robot. In the method, first and second sensing data are obtained, which can be assigned to a first or second sensing means of the robot, respectively, and which contain at least one portion of the area surrounding the robot. An objection detection of an object in the area surrounding the robot is carried out using a fusion of at least the first and the second sensing data. An item of redundancy information is generated, which is assigned to the object detection and at least indicates whether the detected object has been detected using only the first or only the second sensing data or whether the detected object or at least one or more sections of same has been detected redundantly using both the first and the second sensing data.

Abstract: A controller calculates a first bearing indicative of the bearing of a work machine based on first positional data and second positional data. The controller calculates the position of the work machine. The controller calculates a second bearing indicative of the bearing of the work machine based on a change in the position of the work machine in a predetermined zone when a determination condition, including a travel condition indicating that the work machine is traveling in a straight line, is satisfied within the predetermined zone. The controller calculates a correction value of the bearing of the work machine based on the difference between the first bearing and the second bearing in the predetermined zone. The controller corrects the first bearing based on the correction value.

Abstract: An active rear steer (ARS) system for a vehicle includes: a rear wheel steering actuator; and an ARS module. The ARS module is configured to operate in a preemptive active rear steer (PARS) wheel yaw control mode and i) receive signal data from first sensors, ii) determine a target PARS wheel angle based on the signal data, iii) determine a target ramp-in rate for the target PARS wheel angle, and iv) preemptively at least one of prevent and mitigate an oversteer event or an understeer event of the vehicle including controlling the rear wheel steering actuator to preemptively adjust a rear wheel angle of the vehicle based on the target PARS wheel angle and the target ramp-in rate.

Abstract: Systems and methods for coordinating and controlling vehicles, for example heavy trucks, to follow closely behind each other, or linking to form a platoon. In one aspect, on-board controllers in each vehicle interact with vehicular sensors to monitor and control, for example, relative distance, relative acceleration or deceleration, and speed. In some aspects, vehicle onboard systems supply various data (breadcrumbs) to a Network Operations Center (NOC), which in turn provides data (authorization data) to the vehicles to facilitate platooning. The NOC suggests vehicles for platooning based on, for example, travel forecasts and analysis of relevant roadways to identify platoonable roadway segments. The NOC also can provide traffic, roadway, weather, or system updates, as well as various instructions. In some aspects, a mesh network ensures improved communication among vehicles and with the NOC. In some aspects, a vehicle onboard system may provide the authorization data.

Abstract: In a robotic surgical system, an operation unit includes a drive to assist an operation of an operator. A controller is configured or programmed to control the drive to exert a braking force when the operation on the operation unit is decelerated and/or accelerated.

Abstract: The present disclosure relates to a driver-assistance system for keeping a vehicle in a lane of a road, the driver-assistance system including a sensor system, a receiver and a control system, wherein the receiver is designed to receive local map data from a transmitter located within a zone of an intersection, wherein the local map data specifies a course of the lane at least partially, wherein the control system is configured to calculate further data for specifying a course of a part of the lane dependent on the local map data, wherein the part of the lane leads at least partially across the intersection, wherein the control system is configured to control a steering system of the vehicle dependent on the further data and sensor data generated by means of the sensor system in order to keep the vehicle in the lane when crossing the intersection.

Abstract: A method of controlling a time switching to a manual driving mode of an autonomous vehicle includes determining whether there is a request for switching to the manual driving mode, when there is the request, comparing at least one value of yaw rate, deceleration, and shifting in an autonomous driving route with at least one value of yaw rate, deceleration, and shifting by a driver's manual manipulation amount, and according to a size difference between the at least one value of yaw rate, deceleration, and shifting in the autonomous driving route and the at least one value of yaw rate, deceleration, and shifting by the driver's manual manipulation amount, performing a control operation of variably controlling the time switching from the autonomous driving mode to the manual driving mode.

Abstract: The present disclosure relates to a method for determining a steering hysteresis requirement of a steering device of a vehicle, a steering system, a computer program product and a computer-readable storage medium. The steering device is part of a steering system of the vehicle and is coupled to at least one actuator. The actuator is set up to apply a steering torque to the steering device. The method comprises at least the step of determining the steering hysteresis requirement based on at least one rack force of the steering system. The steering hysteresis requirement forms at least a component of a target steering torque which can be applied to the steering device by the at least one actuator.

Abstract: An apparatus and a method for identifying a speed bump are provided. The apparatus may include a vehicle network access device to provide an access interface with a vehicle network, and a controller to acquire information on a position of the speed bump placed on a road on which a vehicle travels, collect, from a vehicle network, information on driving of a driver around the speed bump, and determine a type of the speed bump, based on the information on the driving of the driver.

Abstract: A vehicle power supply device acquires a state of a vehicle, controls a first switch disposed between an auxiliary power supply and a second load to be in a disconnected state in a case where the vehicle is in a predetermined state including ignition off, and controls the first switch to be in a connected state in a case where the vehicle is in a predetermined automatic driving state among automatic driving states including partial and conditional automatic driving.

Abstract: A device for distributing a driving force includes a first sensor for collecting first information related to an obstacle located around a vehicle, a second sensor for collecting second information related to a travel state of the vehicle, a driving control device that distributes a driving force to wheels of the vehicle, and a processor electrically connected to the first sensor, the second sensor, and the driving control device, and the processor determines whether an avoidance travel situation of avoiding collision of the vehicle with the obstacle is detected based on the first information and the second information, and controls a posture of the vehicle by adjusting the distributing of the driving force to the wheels when the avoidance travel situation is detected.

Abstract: A steering control device for a steering member and a turning wheel, includes: a steering angle control unit for controlling an actual steering angle of the steering member via a steering actuator; a turning angle control unit for controlling an actual turning angle of the turning wheel via a turning actuator; and a target generation unit for generating a target steering angle as a control target and a target turning angle as a control target. Before controlling the actual turning angle toward the target turning angle to follow a planned trajectory for the vehicle, the steering angle control unit controls the actual steering angle toward the target steering angle to follow the planned trajectory.

Abstract: The present document relates to a device and method for controlling a reaction torque of an SBW system, which may include a yaw rate estimator for estimating a yaw rate of a vehicle, a vehicle state determinator for comparing a detection result of a yaw rate detection sensor and a yaw rate estimate which is estimated by the yaw rate estimator to determine whether the vehicle is in an under-steer or over-steer state, and a target torque compensator for compensating for a target torque by using an index which is a determination result of the vehicle state determinator and outputting a final target torque.

Abstract: A road surface information providing apparatus includes an information acquisition unit, a road surface condition estimation unit, a risk map generation unit, and a transmission unit. The information acquisition unit acquires vehicle information from at least one vehicle with a wheel detected as being idling among vehicles that are traveling in a predetermined region, and acquire weather information about a surrounding area around the at least one vehicle. The predetermined region includes the surrounding area around the at least one vehicle. The road surface condition estimation unit generates road surface information about an estimated condition of a road surface in the predetermined region on the basis of the vehicle information and the weather information. The risk map generation unit generates a risk map in which the road surface information is correlated with map information. The transmission unit transmits the risk map to the vehicles traveling in the predetermined region.

Abstract: A steering system includes a steering operation shaft in which power transmission to and from a steering wheel is disabled and that steers a steered wheel of a vehicle, a steering operation motor that generates a steering operation force that is a torque applied to the steering operation shaft so as to steer the steered wheel, and a control device that controls the steering operation motor. When a rotation position of the steering wheel is different from a rotation position corresponding to a steered position of the steered wheel, the control device executes a process for correcting the steered position of the steered wheel to a position corresponding to the rotation position of the steering wheel through the steering operation motor.

Abstract: A steering apparatus includes a first CAN communication line provided between a steering input mechanism and a steering mechanism controller and configured to output a first steering operation amount signal output from a first steering operation amount signal output portion to the steering mechanism controller, and a communication line provided between the steering input mechanism and the steering mechanism controller and configured to output a second steering operation amount signal to the steering mechanism controller without intervention of a first microprocessor.

Abstract: A snow groomer vehicle includes a frame, a tool connected to the frame through a front connecting device equipped with an actuator assembly operable to determine a relative position of the tool with respect to the frame, a satellite navigation device and a control system. The control system includes a processing unit and a memory device, containing a target map representing a desired surface to be obtained by processing the snowpack over a region. The processing unit determines a position and orientation of the frame from the data provided with satellite navigation device and determines a configuration of the tool as a function of the position and orientation of the frame and of the target map, so that the passage of the tool causes a removal of the snowpack that conforms the snowpack to the target map. The actuator assembly is operated so as to bring the tool into the determined configuration.

Abstract: A mapping method that includes obtaining a multi-frame image of a parking scene by a camera every other first time interval, obtaining point cloud data of the parking scene by a laser radar every other second time interval, identifying wheel stop information in the multi-frame image by a pre-trained wheel stop identification model, obtaining a wheel stop classification result by fusing the wheel stop information in the multi-frame image, building an initial wheel stop three-dimensional map based on a vehicle positioning result and the wheel stop classification result, and obtaining a wheel stop three-dimensional map by revising the initial wheel stop three-dimensional map in combination with wheel stop position information in the point cloud data.

Abstract: A method for monitoring a steering device including a steering gear, a first steering actuator, a second steering actuator, a first traction mechanism drive with a first traction mechanism configured to connect the first steering actuator to the steering gear, and a second traction mechanism drive with at least one second traction mechanism configured to connect the second steering actuator to the steering gear, includes determining at least one first position parameter of the first steering actuator, and at least one second position parameter of the second steering actuator. The method includes evaluating the first position parameter and the second position parameter to determine that an unintentional change in position of at least one of the first traction mechanism and the second traction mechanism has occurred, and definitely associating the unintentional change in position with one of the first and second traction mechanism drives.

Abstract: A driving assistance apparatus for a vehicle includes: an environment information acquisitor that acquires environment information in front of the vehicle; a target route setter that sets a target route; and a controller that causes the vehicle to travel along the target route.

Abstract: Monitoring driving safety information before a vehicle enters a curve or when the vehicle has entered the curve; obtaining a position of the vehicle in response to the driving safety information; obtaining curve information, where the curve information includes at least one of a position of a start point of the curve and a position of an end point of the curve; and controlling, based on the position of the vehicle and the curve information, the vehicle to stop at a position outside the curve.

Abstract: A driver assistance apparatus includes a tire force margin calculation unit of a front inner wheel in cornering, a driving operation command output unit, and an information presentation unit. The tire force margin calculation unit of the front inner wheel in cornering estimates, on the occasion of cornering of a vehicle, a tire force limit and a tire force current value of the front inner wheel in cornering, and calculates a tire force margin based on the tire force limit and the tire force current value. In accordance with a decline in the tire force margin of the front inner wheel in cornering, the driving operation command output unit outputs a driving operation command that causes restoration of the tire force margin. The information presentation unit presents a driver who drives the vehicle with information regarding the driving operation command outputted by the driving operation command output unit.

Abstract: A method for switching between autonomous drive and manual drive of a transportation vehicle, wherein the driver of the transportation vehicle is observed by at least one interior camera relative to a handover intention and/or takeover intention. In response to a handover intention being detected, the steering wheel is moved away from the driver and the drive is switched to autonomous drive. In response to a takeover intention being detected, the steering wheel is moved toward the hands of the driver and the drive is switched to manual drive.

Abstract: A vehicular driver assistance system includes a front camera module (FCM) disposed at a vehicle. The system, responsive to processing captured image data, generates FCM lane information including information regarding a traffic lane the vehicle is currently traveling along. An e-Horizon module (EHM) generates EHM lane information including information regarding the traffic lane the vehicle is currently traveling along. The vehicular driver assistance system determines an FCM correlation using the FCM lane information and sensor data captured by at least one exterior sensor. The vehicular driver assistance system determines an EHM correlation using the EHM lane information and the sensor data captured by the at least one exterior sensor. Responsive to determining the FCM correlation and the EHM correlation, the system controls lateral movement of the vehicle based on one selected from the group consisting of (i) the FCM lane information and (ii) the EHM lane information.

Abstract: An object of the present invention is to provide a vehicle control device and a vehicle control system capable of further reducing system cost in failure mitigation. The vehicle control device includes a master ECU and one or more client ECUs.

Abstract: The present embodiments relate to a steering control device, a steering assist device, and a steering system. A steering control device comprises an input-side steering control module controlling an input-side steering motor to assist an input-side mechanism mechanically separated from an output-side mechanism connected with a wheel and connected with a steering wheel. The input-side steering control module may control the input-side steering motor and the telescopic motor.

Abstract: A method for driving path prediction is provided. The method concatenates past trajectory features and lane centerline features in a channel dimension at an agent's respective location in a top view map to obtain concatenated features thereat. The method obtains convolutional features derived from the top view map, the concatenated features, and a single representation of the training scene the vehicle and agent interactions. The method extracts hypercolumn descriptor vectors which include the convolutional features from the agent's respective location in the top view map. The method obtains primary and auxiliary trajectory predictions from the hypercolumn descriptor vectors. The method generates a respective score for each of the primary and auxiliary trajectory predictions.

Abstract: This driving support device outputs a target acceleration/deceleration for causing a host vehicle to track a preceding vehicle, if there is a preceding vehicle to track, and if there is no preceding vehicle to track, outputs a target acceleration for bringing the speed of the host vehicle to a set fixed speed, and modifies (corrects) the target acceleration in accordance with the lane width.

Abstract: The present disclosure provides systems and methods for automatically controlling braking and/or wheel speed at a dolly to increase maneuverability. In one form, a system comprises a memory, a first sensor, and at least one processor. The first sensor is configured to determine at least one of a distance from a dolly to a forward trailer or an angle from the dolly to the forward trailer. The at least one processor is configured to: determine that a forward trailer is moving in a reverse direction; determine a steering angle of a vehicle coupled to the forward trailer; measure a rotation of the forward trailer based on information received from the first sensor; and apply at least one of braking or wheel speed control to at least one wheel of the dolly based on the measured rotation of the forward trailer and the determined steering angle of the forward trailer.

Abstract: A reproduction system includes an external detection unit configured to acquire external information of an own vehicle, a vehicle sensor configured to acquire vehicle information of the own vehicle, a storage medium storing computer-readable instructions, and at least one processor connected to the storage medium, the at least one processor executing the computer-readable instructions to generate external time-series data indicating an external situation of the own vehicle in time series based on the external information, generate vehicle time series data indicating a driving situation of the own vehicle in time series based on the vehicle information, generate, based on the external time-series data and the vehicle time-series data, a moving image that reproduces a movement history of the own vehicle at a specific traffic location, and cause a display device to display the moving image.

Abstract: A vehicle driving support device executes lane deviation suppression control when there is a possibility that an own vehicle deviates from a lane and when an execution prohibition condition is not satisfied, and executes the lane deviation suppression control so as to steer the own vehicle such that a behavior parameter representing a behavior of the own vehicle during the execution of the lane deviation suppression control does not exceed a behavior parameter upper limit value. The vehicle driving support device reduces the behavior parameter upper limit value or changes the execution prohibition condition such that the execution prohibition condition is not unlikely to be satisfied when the own vehicle is traveling at a speed equal to or lower than a predetermined speed, compared to when the own vehicle is traveling at a speed higher than the predetermined speed.

Abstract: A detection system for a host vehicle includes a camera, global positioning system (“GPS”) receiver, compass, and electronic control unit (“ECU”). The camera collects polarimetric image data forming an imaged drive scene inclusive of a road surface illuminated by the Sun. The GPS receiver outputs a present location of the vehicle as a date-and-time-stamped coordinate set. The compass provides a directional heading of the vehicle. The ECU determines the Sun's location relative to the vehicle and camera using an input data set, including the present location and directional heading. The ECU also detects a specular reflecting area or areas on the road surface using the polarimetric image data and Sun's location, with the specular reflecting area(s) forming an output data set. The ECU then executes a control action aboard the host vehicle in response to the output data set.

Abstract: Method for determining steering deadband and eliminating starting drag in a vehicle, having at least one steered wheel mechanically connected to an actuator, includes, from a first initial position, wherein the actuator is in a middle position and is biased toward a second direction, the actuator is moved toward a first direction, the first direction being opposite to the second direction, until a movement of the steered wheel is detected in a first deadband detection position of the actuator. The actual position of the actuator in the first deadband detection position is stored as a first deadband value ?DB1. After reaching the first deadband detection position, the actuator is moved further in the first direction by a predetermined ?ESD1 first starting drag elimination angle to cause a predetermined movement of the at least one steering wheel and further mechanical parts connected thereto arriving to a first starting drag elimination position.

Abstract: A power steering controller including: a first override determination part that determines whether automatic steering of a vehicle is possible on the basis of a state of the vehicle; a second override determination part that determines whether manual steering of the vehicle is possible on the basis of a state of a driver of the vehicle; and a driving mode switching part that switches between an automatic steering mode for automatically steering the vehicle, a manual steering mode for manually steering the vehicle, and a semi-automatic steering mode for automatically steering and manually steering the vehicle, on the basis of a determination result of the first override determination part and a determination result of the second override determination part.

Abstract: A system for guiding a vehicle includes first and second operating elements, which are configured to influence a wheel steering angle of the vehicle and are not mechanically coupled to one another. A target steering angle is determined as a function of a sum of steering torques, which is dependent on a target steering torque and actual steering torques of the first and of the second operating elements. The first and second actual steering angles are adjusted as a function of the target steering angles in the respective first and second operating elements. A target wheel steering angle is determined as a function of the target steering angle, wherein the sum of steering angles includes two summands dependent on the first actual steering angle and the second actual steering angle, respectively. The wheel steering angle is adjusted as a function of the target wheel steering angle.

Abstract: A steering system includes a motor, and a processor configured to perform a method. The method includes computing, by a processor, a predicted steering angle at a future time step. The method further includes determining, by the processor, a predicted vehicle-position at the future time step based on the predicted steering angle. The method further includes detecting, by the processor, a proximity to an object at the future time step based on predicted vehicle-position. The method further includes generating, by the processor, an intervention signal in response to the proximity being below a predetermined threshold.

Abstract: A steering control device includes a controller configured to control driving of a motor that generates a torque. The torque is a torque applied to a steering mechanism of a vehicle using electric power from at least any one of an in-vehicle main power source and an auxiliary power source that backs up the main power source. The controller is configured to wait for the auxiliary power source to be charged to an extent that the main power source is able to be backed up and to permit the vehicle to travel when the controller is activated with an activation operation for the vehicle as a trigger and transitions to a state where control of the motor is executable.

Abstract: A control device includes a reaction force controller to generate an input torque input to the control target and control a reaction force transmitted from a steering wheel to a steering person, an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model, and a state feedback circuit to feed back a state compensation value to the input torque based on the output of the control target. The assist controller is configured or programmed such that the transfer function of the control target is constrained by the transfer function of the nominal model in the frequency band where the gain in the gain characteristic of the complementary sensitivity function with respect to the modeling error between the control target and the nominal model is approximately 1.

Abstract: A sensing system for hand or body part positioning detection on an object, particularly on a rim of a steering wheel, includes at least one electrically conducting signal line that is arrangeable on a surface of the object with a priori knowledge about a relation between a distance of any portion of the at least one signal line from a reference point and information on a position on the object, a signal voltage source for providing a time-dependent measurement signal to be traveling along the signal line, and a control and evaluation unit. From a received reflected measurement signal, the control and evaluation unit determines a position or positions on the object of a portion or portions of the signal line at least partially reflecting the measurement signal. Based on the determined position or positions, a hand or body part positioning on the object is determined.

Abstract: A vehicle: finds a common central point at which a difference between a distance from a current position of a first tire and a distance from a target position of the first tire is within a predetermined range and a difference between a distance from a current position of a second tire and a distance from a target position of the second tire is within a predetermined range; and sets a steering angle of each of a plurality of tires so that the tire will be oriented in a direction of a tangent to a clearance circle whose center is the common central point or oriented in a direction whose angle difference from the direction of the tangent is within a predetermined range.