Offset compensation for trailer backup assist steering input device
First Claim
1. A trailer backup assist system for a vehicle reversing a trailer, comprising:
- a knob disposed in the vehicle and having a position indicator, the knob rotatable from a biased position to a number of positions, each position of the knob outputting a signal aligned with the position indicator and indicative of a desired curvature for a backup path of the vehicle and the trailer; and
a controller configured to;
determine a signal offset when the knob is returned to the biased position and the signal outputted from the knob is out of alignment with the position indicator;
apply the signal offset to the outputted signal such that the outputted signal is realigned with the position indicator; and
generate a steering command for the vehicle to guide the trailer on the desired curvature according to the outputted signal to which the signal offset was applied.
1 Assignment
0 Petitions
Accused Products
Abstract
A trailer backup assist system for a vehicle reversing a trailer, according to one embodiment, includes a sensor that senses a hitch angle between the vehicle and the trailer. The trailer backup assist system may also include a steering input device, such as a rotatable knob, that is movable between a plurality of positions that each provide a desired curvature of the trailer. In addition, the trailer backup assist system may include a controller that determines an offset of the desired curvature when the knob is stationary in a central position. The control then generates a steering command for the vehicle to guide the trailer on the desired curvature, taking into consideration the offset.
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Citations
15 Claims
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1. A trailer backup assist system for a vehicle reversing a trailer, comprising:
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a knob disposed in the vehicle and having a position indicator, the knob rotatable from a biased position to a number of positions, each position of the knob outputting a signal aligned with the position indicator and indicative of a desired curvature for a backup path of the vehicle and the trailer; and a controller configured to; determine a signal offset when the knob is returned to the biased position and the signal outputted from the knob is out of alignment with the position indicator; apply the signal offset to the outputted signal such that the outputted signal is realigned with the position indicator; and
generate a steering command for the vehicle to guide the trailer on the desired curvature according to the outputted signal to which the signal offset was applied. - View Dependent Claims (2, 3, 4, 5)
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6. A trailer backup assist system for a vehicle reversing a trailer, comprising:
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a steering input device disposed in the vehicle and having a position indicator, the steering input device movable from a biased position to a number of positions, each position of the steering input device outputting a signal aligned with the position indicator and indicative of a desired curvature for a backup path of the vehicle and the trailer; and a controller configured to; determine a signal offset when the steering input device is returned to the biased position and the signal outputted from the knob is out of alignment with the position indicator; apply the signal offset to the signal such that the signal is realigned with the position indicator; and
generate a steering command for the vehicle to guide the trailer on the desired curvature according to the signal to which the signal offset was applied. - View Dependent Claims (7, 8, 9, 10)
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11. A method for reversing a vehicle attached to a trailer, comprising:
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providing a knob inside the vehicle and having a position indicator, the knob rotatable from a biased position to a number of positions, each position of the knob outputting a signal aligned with the position indicator and indicative of a desired curvature for a backup path of the vehicle and the trailer; and providing a controller configured to; determine a signal offset when the knob is returned to the biased position and the signal outputted from the knob is out of alignment with the position indicator; apply the signal offset to the outputted signal such that the outputted signal is realigned with the position indicator; and generate a steering command for the vehicle to guide the trailer on the desired curvature according to the outputted signal to which the signal offset was applied. - View Dependent Claims (12, 13, 14, 15)
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Specification