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公开(公告)号：US20240308574A1
公开(公告)日：2024-09-19
申请号：US18602619
申请日：2024-03-12
发明人： Kenji Shibata , Koichi Nishimura , Takahito Ishino , Ryo Yamazaki , Hiroyasu Inoue , Isao Namikawa , Nobuyori Nakajima , Hiroki Tomizawa , Takuya Maegawa
CPC分类号： B62D5/0463 , B62D6/002
摘要： In a motor control device for a steer-by-wire steering device, the motor control device having a redundant system consisting of two systems, a first turning current command value is calculated in a first system, and a second turning current command value is calculated in a second system. A third processor outputs the first turning current command value when the two current command values are not divergent and outputs the second turning current command value when the two current command values are divergent. When a determination of a rapid steering operation is made, the third processor outputs the first turning current command value regardless of whether or not the two current command values are divergent.
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公开(公告)号：US12116052B2
公开(公告)日：2024-10-15
申请号：US17662118
申请日：2022-05-05
发明人： Akira Takesaki , Hisashi Kameya , Hiroki Tomizawa , Masaharu Yamashita , Kenji Shibata , Yosuke Yamashita , Shintaro Takayama , Toshihiro Takahashi , Yuji Fujita , Kenichi Abe , Yugo Nagashima
CPC分类号： B62D5/0487 , B62D5/046 , B62D6/00
摘要： Control calculation units of a back system in each actuator operate by a collaborative drive mode in which a torque is output to a motor drive unit by using an information transmitted and received mutually by a communication between the systems in common. Cooperative control calculation units in a reaction force actuator and a turning actuator can operate in cooperation with each other based on the information transmitted and received mutually by a communication between actuators. A communication between adjacent systems and a communication between adjacent actuators are restored, when a focus control calculation unit is restored, after the focus control calculation unit is stopped during operation and at least one of the communication between adjacent systems or the communication between adjacent actuators is interrupted.
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公开(公告)号：US11973453B2
公开(公告)日：2024-04-30
申请号：US17660817
申请日：2022-04-26
发明人： Hiroki Tomizawa , Masaharu Yamashita , Kenji Shibata , Yosuke Yamashita , Shoji Kubota , Yugo Nagashima , Yuji Fujita , Kenichi Abe
摘要： A first actuator and a second actuator each have a plurality of control calculation units provided redundantly and a plurality of motor drive units provided redundantly. In the first and the second actuators, the control calculation units of the systems paired with each other transmit and receive information to and from each other by a communication between the actuators. When a failure occurs in any system in either of the two actuators, or when a failure occurs in a communication between actuators in either system, the control calculation unit of each actuator of the system in which the failure occurred stops the motor drive control. Then, the motor drive control is continued by the control calculation unit of the normal system in both actuators.
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公开(公告)号：US12024174B2
公开(公告)日：2024-07-02
申请号：US17972017
申请日：2022-10-24
发明人： Kazuma Hasegawa , Yuji Fujita , Takashi Kodera , Isao Namikawa , Atsushi Ishihara , Masaharu Yamashita , Kenji Shibata , Yuko Goto , Hiroki Tomizawa , Nobuyori Nakajima
IPC分类号： B60W10/20 , B60W30/182 , B60W50/02 , B60W50/029 , B60W50/08 , B60W50/00
CPC分类号： B60W30/182 , B60W10/20 , B60W50/0205 , B60W50/029 , B60W50/082 , B60W50/085 , B60W2050/0022 , B60W2050/0292 , B60W2510/083 , B60W2510/202
摘要： A control device includes control circuits of a plurality of systems. When a transition condition is established, the control circuits of the systems make transition of a driving mode from a first driving mode to a second driving mode, and when a return condition is established in a state in which the driving mode has transitioned to the second driving mode, the control circuits of the systems make transition of the driving mode from the second driving mode to the first driving mode while gradually changing the current command values of the control circuits' own systems toward the current command values before the adjustment.
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公开(公告)号：US12030559B2
公开(公告)日：2024-07-09
申请号：US17346796
申请日：2021-06-14
CPC分类号： B62D5/0463 , B62D15/021
摘要： A steering system includes a steering shaft that rotates along with an operation of a steering wheel; a motor configured to generate a torque that is applied to the steering shaft; and a control unit configured to control the motor. The control unit is configured to control the motor such that a rotation speed of the steering wheel decreases gradually to zero when automatic rotation of the steering wheel is stopped, in a case where the steering wheel is automatically rotated as an adjustment process of adjusting a rotational position of the steering wheel.
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公开(公告)号：US11834115B2
公开(公告)日：2023-12-05
申请号：US17347142
申请日：2021-06-14
CPC分类号： B62D6/008 , B62D5/006 , B62D5/0481
摘要： A steering system includes a steering shaft; a reaction motor; and a control unit configured to control the reaction motor. The control unit has a function of performing a correction process of rotating the steering wheel using the reaction motor such that a displacement in a rotational position of the steering wheel with respect to a correct rotational position corresponding to a turning position of the turning wheels decreases when a power supply of the vehicle is turned on and the rotational position of the steering wheel is different from the correct rotational position. The control unit is configured to perform the correction process when the displacement is equal to or greater than a predetermined permissible value and not to perform the correction process when the displacement is less than the permissible 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：US11891137B2
公开(公告)日：2024-02-06
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
CPC分类号： B62D6/008
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：US11840296B2
公开(公告)日：2023-12-12
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
CPC分类号： B62D6/008 , B62D5/0463 , B62D6/002 , B62D6/08
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：US11840295B2
公开(公告)日：2023-12-12
申请号：US17346476
申请日：2021-06-14
CPC分类号： B62D6/008 , B62D5/006 , B62D5/0466
摘要： A steering system includes a steering shaft; a motor configured to generate a torque applied to the steering shaft; and a control unit configured to control the motor. The control unit has a function of performing steering angle feedback control for causing a steering angle that is a rotation angle of a steering wheel to reach a target steering angle that is set based on a point of view of adjusting a rotational position of the steering wheel, as an adjustment process of adjusting the rotational position of the steering wheel. The control unit is configured to set a limit value for limiting a change range of the target steering angle with respect to the steering angle at each moment in a period in which automatic rotation of the steering wheel is hindered in a case where the automatic rotation is hindered while the adjustment process is being performed.
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