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公开(公告)号：US20230130446A1
公开(公告)日：2023-04-27
申请号：US17969199
申请日：2022-10-19
发明人： Tomoyuki IIDA , Yuko Otsuka , Atsushi Ishihara , Junya Miyake
摘要： A steer-by-wire steering system includes a controller configured to execute a steering control process and a determining process of determining a converted operation amount by converting an actual wheel steering amount to an operation amount of an operation member based on an inverse of a steering gear ratio. In the determining process, when the steering gear ratio abruptly changes, the controller converts a gap of the converted operation amount generated at a time point of occurrence of the abrupt change to a gap of the wheel steering amount to grasp a converted steering amount offset value. While gradually decreasing the converted steering amount offset value, the controller thereafter re-converts the converted steering amount offset value to the gap of the converted operation amount based on the inverse of the steering gear ratio to determine a converted operation amount correction value and corrects the converted operation amount based on the value.
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公开(公告)号：US20220153343A1
公开(公告)日：2022-05-19
申请号：US17518766
申请日：2021-11-04
发明人： Tomoyuki IIDA , Masaharu Yamashita , Kenji Shibata , Yuji Fujita , Takashi Kodera , Isao Namikawa , Satoshi Matsuda
IPC分类号： B62D6/00
摘要： A steer-by-wire steering system for a vehicle, including: an operating device including a steering operating member, a counterforce applying mechanism configured to apply, to the steering operating member, an operation counterforce by a counterforce motor, and an operating controller configured to control the operation counterforce; a steering device including a steering actuator configured to steer a wheel by a steering motor and a steering controller configured to control an amount of steering of the wheel by the steering actuator; and a communication line communicably connecting the operating controller and the steering controller, wherein the steering controller is configured to: determine a status code based on a status of the steering device; and transmit the status code to the operating controller via the communication line; and wherein the operating controller is configured to change a magnitude of the operation counterforce in accordance with the status code received by the operating controller.
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公开(公告)号：US20240286673A1
公开(公告)日：2024-08-29
申请号：US18585894
申请日：2024-02-23
发明人： Hajime KAMIMAE , Yoshio KUDO , Tomoyuki IIDA , Yuko GOTO , Takahito ISHINO , Atsushi ISHIHARA , Junya MIYAKE
摘要： A reaction force actuator applies, during normal operation, a steering reaction force, which rapidly increases upon approaching an upper limit of a virtual steering range, to a steering wheel. During rapid steering in which a turning angle velocity is greater than or equal to a predetermined value and a turning follow delay is greater than or equal to a predetermined value, the reaction force actuator applies a steering reaction force to the steering wheel based on an upper limit corresponding to a narrower virtual steering range.
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公开(公告)号：US20230033288A1
公开(公告)日：2023-02-02
申请号：US17872508
申请日：2022-07-25
发明人： Satoshi MATSUDA , Isao NAMIKAWA , Koji ANRAKU , Tomoyuki IIDA , Masaharu YAMASHITA , Kenji SHIBATA
摘要： A steering control device includes a base axial force calculator, a limiting axial force calculator, and a final axial force calculator. The limiting axial force calculator includes a steering angle holder, a reference angle calculator, a final difference calculator, and an axial force calculator. The steering angle holder is configured to hold a steering angle at the time of limiting a turning operation of the turning wheels when the turning operation is limited. The reference angle calculator is configured to calculate a reference angle. The final difference calculator is configured to calculate a final difference which is a final difference between the reference angle and the current steering angle. The axial force calculator is configured to calculate a limiting axial force based on a value of the final difference.
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公开(公告)号：US20240149940A1
公开(公告)日：2024-05-09
申请号：US18383696
申请日：2023-10-25
发明人： Satoshi MATSUDA , Isao NAMIKAWA , Koji ANRAKU , Tomoyuki IIDA , Kenji SHIBATA
摘要： A steering control device includes a processor configured to execute a reaction force control process. The reaction force control process includes a reaction force torque calculation process of calculating a reaction force torque operation amount. The reaction force torque calculation process includes a deviation compensation calculation process of calculating a deviation-compensating component. The deviation compensation calculation process includes a process of calculating a positional deviation, a process of calculating the deviation-compensating component based on the positional deviation, and a process of switching among a plurality of calculation states for calculating the deviation-compensating component. The process of switching among the calculation states is a process of permitting switching among the calculation states on the condition that a permission condition is met. The permission condition is met based on an operation amount that varies in association with a driver's operation of an operation member.
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公开(公告)号：US20220185367A1
公开(公告)日：2022-06-16
申请号：US17546110
申请日：2021-12-09
摘要： A steering control device includes a first calculator configured to calculate a first axial force, a second calculator, and a third calculator configured to calculate a third axial force. The third calculator is configured to, when a specific situation occurs in which a current of a turning motor has to be limited, decrease a reflection degree of the first axial force in the third axial force and increase a reflection degree of the second axial force in the third axial force.
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公开(公告)号：US20220089217A1
公开(公告)日：2022-03-24
申请号：US17481989
申请日：2021-09-22
发明人： Isao NAMIKAWA , Satoshi MATSUDA , Tomoyuki IIDA , Yoshio KUDO , Masaharu YAMASHITA , Kenji SHIBATA
摘要： A steering control device includes a control unit configured to control at least an operation of a steering-side motor. The control unit is configured to calculate a target reaction torque; calculate a difference axial force that is used to limit steering for turning the turning wheels in a predetermined direction, the difference axial force being reflected in the target reaction torque; and set a reference angle to one of a steering angle and a turning angle, set a converted angle to an angle obtained by converting another of the steering angle and the turning angle according to a steering angle ratio, and calculate the difference axial force based on a difference between the reference angle and the converted angle.
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公开(公告)号：US20200269908A1
公开(公告)日：2020-08-27
申请号：US16796407
申请日：2020-02-20
摘要： The electric power steering apparatus according to the present disclosure includes a steering assist mechanism and a controller. The steering assist mechanism is driven by a motor and assists operation of a steering wheel by a driver. The controller acquires the position of the steering wheel and sets a target value of a steering reaction torque acting on the steering wheel. Then, the controller calculates a position target of the steering assist mechanism based on the position of the steering wheel and the target value of the steering reaction torque, and controls the motor of the steering assist mechanism according to the position target of the steering assist mechanism.
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