Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2005-05-31
2005-05-31
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C701S041000
Reexamination Certificate
active
06901320
ABSTRACT:
The present invention provides systems and methods of friction compensation in a steer-by-wire system or in a general electric steering system using control, estimation and modeling methodologies. A friction compensator in the steer-by-wire control system produces a friction compensating torque value equal and opposite in sign to the instantaneous friction torque. This compensating friction torque is added to the steering system control signal to eliminate the effects of friction present in the system such that the system performances are improved. The friction compensator produces the compensating friction torque according to one of two schemes: model-based or non-model based. The model-based scheme encompasses a number of different methods including a standard model-based scheme, a disturbance torque observer-based scheme, an adaptive friction compensation scheme, or a model reference adaptive control scheme. The non-model based scheme includes a fuzzy logic scheme.
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Ashrafi Behrouz
Larsen Ann Hayes
Yao Yixin
Behncke Christine M.
Brinks Hofer Gilson & Lione
Camby Richard M.
Visteon Global Technologies Inc.
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