Nissan Motor Company Limited

Wisconsin Alumni Research Foundation

Other

Renault S.a.s.

Kawamura, Atsuo

Takashi Fukushige

Satoshi Tange

Robert Donald Lorenz

Kensuke Sasaki

Akinobu Gotou

Akinobu Goto

Brent S Gagas

Chen-Yen Yu

Takashi Kato

Takashi Katou

Apoorva Athavale

Yusuke Zushi

Yuichi Shibukawa

Atsuo Kawamura

A travel assistance method is executed by a processor and comprises: acquiring, from a device for storing map information, information on static traveling path boundaries between a traveling path of a subject vehicle and other than the traveling path; acquiring, from a sensor for detecting surrounding environment of the subject vehicle, information on dynamic traveling path boundaries different from the static traveling path boundaries; generating, based on the information on the static traveling path boundaries, a static traveling path on which the subject vehicle can travel; generating, based on the information on the static traveling path and the dynamic traveling path boundaries, a dynamic traveling path which is shorter than the static traveling path and corresponds to the surrounding environment; and controlling the subject to travel along a traveling path including the static traveling path and the dynamic traveling path.

Travel assistance method and travel assistance device

When a subject vehicle arrives at a destination while traveling, or when a driver of the subject vehicle becomes unable to drive during travel or when a failure occurs that interferes with the travel of the subject vehicle during the travel, a control plan for autonomous stop control is generated, the control plan comprising deceleration control for decreasing a speed of the subject vehicle; pulling over control for moving the subject vehicle from a lane in which the subject vehicle travels to the shoulder of the road; and stop control for stopping the subject vehicle at the shoulder of the road, and on a basis of this control plan, the autonomous stop control is performed to decelerate the subject vehicle and then move it to the shoulder of the road by individually and sequentially performing each of the deceleration control, the pulling over control, and the stop control.

Autonomous control system that performs pull-over operations through sequential steering and deceleration inputs

A driving assistance method for controlling an own vehicle by a controller in such a way that the own vehicle travels along a target travel trajectory includes: acquiring level-difference information of a level difference existing along a lane in which the own vehicle travels; and when, from the level-difference information, determining that the own vehicle is to climb over the level difference, generating the target travel trajectory in such a way that a level-difference climbing-over angle, which is an angle formed by the level difference and the target travel trajectory, is larger than a threshold value.

Driving assistance method and driving assistance device

A travel support method for a vehicle comprises estimating a position of a subject vehicle, generating a subject vehicle traveling route, based on the estimated position of the subject vehicle and map information, calculating a degree of first reliability indicating reliability of the subject vehicle traveling route, detecting a preceding vehicle traveling ahead of the subject vehicle, generating a preceding vehicle traveling route, calculating a degree of second reliability indicating reliability of the preceding vehicle traveling route, based on the preceding vehicle traveling route, calculating, based on the degrees of the first reliability and second reliability, an integration ratio for integrating the subject vehicle traveling route and the preceding vehicle traveling route, calculating a target traveling route of the subject vehicle by integrating the subject vehicle traveling route and the preceding vehicle traveling route at the integration ratio, and controlling the subject vehicle based on the target traveling route.

A target vehicle speed generation device includes a controller for generating a target vehicle speed of a host vehicle in accordance with a speed limit of a travel path of the host vehicle. The controller includes a speed limit information acquisition unit and a target vehicle speed generation unit. The speed limit information acquisition unit acquires the speed limit of the travel path of the host vehicle during travel. The target vehicle speed generation unit generates a target acceleration together with the generation of the target vehicle speed in accordance with the speed limit. The target vehicle speed generation unit has a first acceleration limiter computation unit that, during the generating of the target acceleration, sets an acceleration limiter to increase in a direction of relaxing a limitation on acceleration correspondingly with an increase in the speed limit.

Target vehicle speed generation method and target vehicle speed generation device for driving-assisted vehicle

A travel control method comprises: detecting a travelable road area of the road area in which the subject vehicle can travel; generating a potential field in a space of the travelable road area in which a potential value of a left-side boundary line and a right-side boundary line are set to different values from each other; calculating a travelable road area width by applying the Potential Method; comparing the difference between a lateral position of a travel route set on the basis of the calculated travelable road area width and a lateral position of the travel route set in advance in the travelable road area on the basis of the left-side boundary line or the right-side boundary line; correcting the potential value; regenerating the potential field set to the corrected potential value; generating the travel route applying the Potential Method to the regenerated potential field; executing autonomous travel control.

Vehicle travel control method and travel control device

A travel assisting method for a vehicle which is executed by a processor, comprising: generating a vehicle speed command value based on vehicle information of a subject vehicle; calculating the vehicle speed command value at a predetermined time (a look-ahead time) ahead of a current time based on information of a feature existing ahead of the subject vehicle in a travelling direction, as a look-ahead vehicle speed command value; and controlling the subject vehicle based on the look-ahead vehicle speed command value. Further, a lighting state of a traffic light located around the subject vehicle is detected, and the look-ahead time is set based on the lighting state.

A vehicle position correction device corrects a position error of an host vehicle provided with a navigation control unit that includes a target route corrector that corrects a target route. The target route corrector detects a lane boundary of a lane in which the host vehicle travels. The target route corrector compares positional relationships between a detect lane boundary and a target route on a map, and calculates a lateral correction amount for the target route in situations where the target route is within a prescribed distance of the lane boundary, or in situations where the target route is on an opposite side of the lane boundary to the host vehicle. Upon calculating the lateral correction amount, the target route corrector moves the target route sideways in a lateral direction by the lateral correction amount to correct the target route.

Vehicle position correction method and vehicle position correction device for drive-assisted vehicle

A target vehicle speed generation device generates a target vehicle speed of a driving-assisted vehicle (autonomously driven vehicle). The target vehicle speed generation device includes a controller that includes a plurality of vehicle speed command generation units and generates a target vehicle speed for when the vehicle is to travel/stop. The controller includes a look-ahead vehicle speed command calculation unit and a lowest vehicle speed command mediation unit. The look-ahead vehicle speed command calculation unit calculates a look-ahead vehicle speed command value that comes after the elapse of a prescribed amount of time from a present time for each vehicle speed command value generated by the plurality of vehicle speed command generation units. The lowest vehicle speed command mediation unit selects a lowest value among the plurality of look-ahead vehicle speed command values calculated by the look-ahead vehicle speed command calculation unit.

A permanent magnet synchronous motor includes a stator, a rotor rotatable relative to the stator, and a magnetic structure with a low coercive force magnet and a high coercive force magnet that are arranged magnetically in series with respect to each other to define a pole-pair of the permanent magnet synchronous motor. A magnetization level of the low coercive force magnet is changeable by a stator current pulse such that a stator magnetomotive force at a rated current is equal to or larger than a product of a magnetic field strength for fully magnetizing the low coercive force magnet and a thickness of the low coercive force magnet.

Permanent magnet synchronous motor

A vehicle travel control method is provided for controlling a host vehicle so as to follow a preceding vehicle. A first area where the host vehicle can possibly travel is calculated from a travel trajectory of the new preceding vehicle upon detecting a new preceding vehicle cutting in between the preceding vehicle and the host vehicle. A second area is set to a previous travelable area of the host vehicle that was determined up to a previous time. The first area and the second area are added to define a defined travelable area. A target travel trajectory of the host vehicle is generated within the defined travelable area. The host vehicle is controlled along the generated target travel trajectory.

Vehicle travel control method and vehicle travel control device

A vehicle position correction device is provided with a controller for correcting a position error of an autonomous host vehicle. The controller detects a lane boundary of a lane in which the host vehicle travels. The controller calculates a target value for a lateral correction amount of the target route by comparing positional relationships between lane boundary detection results and the target route on a map, and changes a lateral movement speed of the target route to calculate the target value for the lateral correction amount according to a bearing of the host vehicle in which the bearing being a vehicle attitude angle. The controller corrects the target route by moving the target route sideways in a lateral direction by an amount equal to the lateral correction amount upon the calculation of the lateral correction amount.

Vehicle position control method and device vehicle position control device for correcting position in drive-assisted vehicle

A target vehicle speed generation device includes a controller that includes a target travel route generation unit, a peripheral object information acquisition unit, and a target vehicle speed generation unit. The target travel route generation unit generates a target travel route of the vehicle. The peripheral object information acquisition unit acquires position information pertaining to an obstacle on a travel path of the vehicle, and position information pertaining to an obstacle that is located toward the side and is outside of the travel path of the vehicle. The target vehicle speed generation unit calculates a plurality of lateral deviations to the obstacle with respect to the target travel route, and generates a lower target vehicle speed for an obstacle having a lesser lateral deviation than for an obstacle having a greater lateral deviation.

A travel control device includes a controller for controlling travel of an autonomous host vehicle. The controller detects left and right lane boundaries and controls travel of the host vehicle based on a result of lane boundary detection. The controller includes a road geometry distinguishing unit and a rate limiter unit. The road geometry distinguishing unit distinguishes a curve, and a direction of the curve, based on road geometry information. When traveling through the curve, the rate limiter unit sets a result of lane boundary detection at an inside of a corner to a value for which change in a lateral direction approaching the host vehicle is restricted.

Travel control method and travel control device for drive-assisted vehicle

A magnetization state control method for a variable magnetization machine, the method includes generating a flux linkage vector while changing a magnetization state of the variable magnetization machine such that a trajectory of the flux linkage vector has a curved clockwise trajectory on a dq-axis plane and a magnitude of the flux linkage vector temporally changes, with the dq-axis plane being a synchronous reference frame with a d-axis pointing in a direction of a permanent magnet flux and a q-axis being 90 degrees ahead of the d-axis in a rotational direction of a rotor.

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Kanagawa, Japan

Takashi Fukushige