STEER BY WIRE SYSTEM DIAGNOSTIC
    5.
    发明申请

    公开(公告)号:US20190084614A1

    公开(公告)日:2019-03-21

    申请号:US16134126

    申请日:2018-09-18

    Abstract: According to one or more embodiments a steer by wire steering system includes a handwheel actuator that provides a commanded position for a rack of a vehicle. The steer by wire steering system further includes a roadwheel actuator that moves the rack to a rack position based on the commanded position from the handwheel actuator. The steer by wire steering system further includes a diagnostic apparatus to compute a reference position based on the commanded position, and to compute a reference tracking error based on a difference between the reference position and the rack position. The diagnostic apparatus further determines a fault condition with the steer by wire system using the reference tracking error.

    Handwheel-roadwheel resynchronization in steer-by-wire systems

    公开(公告)号:US11414122B2

    公开(公告)日:2022-08-16

    申请号:US16290342

    申请日:2019-03-01

    Abstract: According to one or more embodiments, a steer by wire steering system includes a handwheel actuator, a roadwheel actuator, and a resynchronization module to dynamically adjust handwheel position that is used for rack position reference calculation. The dynamic adjustment includes determining a desynchronization amount based on a difference in an actual handwheel position and a synchronized handwheel position. The dynamic adjustment further includes computing a handwheel adjustment using the desynchronization amount, a vehicle speed, and a handwheel speed. The dynamic adjustment further includes computing an adjusted handwheel position based on the handwheel adjustment and the actual handwheel position. The dynamic adjustment further includes updating the reference rack position based on the adjusted handwheel position. The dynamic adjustment is continuously repeated until the handwheel adjustment is substantially equal to zero.

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