SYSTEM AND METHOD OF CALIBRATING A TRAILER BACKUP ASSIST SYSTEM
First Claim
1. A method of calibrating a backup assist system for a trailer attached to a vehicle, comprising:
- driving the vehicle forward substantially straight above a threshold speed;
sensing a yaw rate of the vehicle;
sensing a measured hitch angle of the trailer;
determining an angle rate based on the measured hitch angle; and
determining an offset between the measured hitch angle and an actual hitch angle when the yaw rate and angle rate are substantially zero.
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Abstract
A system and a method are provided for calibrating a backup assist system for a trailer attached to a vehicle. The method includes driving the vehicle forward substantially straight above a threshold speed, sensing a yaw rate of the vehicle, and sensing a measured hitch angle of the trailer. A yaw sensor continuously senses the yaw rate of the vehicle and a hitch sensor continuously measures the hitch angle for determining an angle rate based on the measured hitch angle. Further, a controller determines an offset between the measured hitch angle and an actual hitch angle when the yaw rate and angle rate are substantially zero or otherwise the same.
166 Citations
20 Claims
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1. A method of calibrating a backup assist system for a trailer attached to a vehicle, comprising:
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driving the vehicle forward substantially straight above a threshold speed; sensing a yaw rate of the vehicle; sensing a measured hitch angle of the trailer; determining an angle rate based on the measured hitch angle; and determining an offset between the measured hitch angle and an actual hitch angle when the yaw rate and angle rate are substantially zero. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of calibrating a backup assist system for a trailer attached to a vehicle, comprising:
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driving the vehicle forward above a threshold speed; steering the vehicle straight; sensing a measured hitch angle of the trailer; determining an angle rate based on the measured hitch angle; and determining an offset between the measured hitch angle and an actual hitch angle when the angle rate is substantially zero. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system for calibrating a backup assist system for a trailer attached to a vehicle, comprising:
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a hitch sensor continuously measuring a hitch angle for determining an angle rate; a yaw sensor continuously sensing a yaw rate of the vehicle; and a controller determining an offset of the measured hitch angle when vehicle is driving forward above a threshold speed and the yaw and angle rates are substantially zero. - View Dependent Claims (17, 18, 19, 20)
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Specification