Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2005-04-06
2009-12-29
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C180S446000
Reexamination Certificate
active
07640089
ABSTRACT:
A vehicle steering control system for a vehicle/trailer combination that provides rear-wheel steering assist to improve the vehicle/trailer combination stability and handling performance. The control system provides an open-loop feed-forward control signal based on hand-wheel angle and vehicle speed. The control system includes a vehicle yaw rate command interpreter that provides a vehicle closed-loop feedback control signal based on the yaw rate of the vehicle, a trailer yaw rate command interpreter that provides a trailer closed-loop feedback control signal based on the yaw rate of the trailer, and a vehicle lateral acceleration command interpreter that provides a closed-loop feedback control signal based on the lateral acceleration of the vehicle. The closed-loop feedback signals are added together and then combined with the open-loop feed-forward control signal to provide the rear-wheel steering assist.
REFERENCES:
patent: 6580988 (2003-06-01), Lin et al.
patent: 7269489 (2007-09-01), Deng et al.
patent: 7359778 (2008-04-01), Goto et al.
patent: 2004/0002800 (2004-01-01), Grougan et al.
Chin Yuen-Kwok
Deng Weiwen
Lee Yong H.
Rule David S.
Camby Richard M.
GM Global Technology Operations Inc.
Miller John A.
Miller IP Group, PLC
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