Adaptive rear-wheel steer open-loop control for...

Details Adaptive rear-wheel steer open-loop control for... Adaptive rear-wheel steer open-loop control for...

2007-09-11

2007-09-11

Chin, Gary (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

C280S400000, C180S418000

Reexamination Certificate

active

11106102

ABSTRACT:
A rear-wheel steering control system for a vehicle/trailer combination that adaptively changes an open-loop feed-forward command signal for different trailers or the same trailer with different configurations based only on vehicle parameters. The system includes a hand-wheel sensor for providing a hand-wheel angle signal of a hand-wheel position of the vehicle, a vehicle speed sensor for providing a vehicle speed signal of the vehicle, and a vehicle yaw rate sensor for providing a measured vehicle yaw rate signal of the vehicle. The system also determines if a vehicle yaw rate has reached a steady state and uses the steady-state yaw rate signal to calculate the rear-wheel steering command. In one embodiment, the system updates feed-forward rear/front values for a plurality of predetermined vehicle speeds when determining the proper rear-wheel steering command.

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patent: 6580988 (2003-06-01), Lin et al.
patent: 6854557 (2005-02-01), Deng et al.
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patent: 2005/0206233 (2005-09-01), Offerle et al.
patent: 2006/0229782 (2006-10-01), Deng et al.

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