CONTROL FOR TRAILER BACKUP ASSIST SYSTEM

• US 20140249723A1
• Filed: 04/18/2014
• Published: 09/04/2014
• Est. Priority Date: 04/19/2011
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Pilutti, Thomas Edward, Trombley, Roger Arnold, Hafner, Michael, Rupp, Matthew Y., Rhode, Douglas Scott, Recker, Darrel Alan
• Granted Patent: US 9,493,187 B2
• Time in Patent Office: Days
• US Class Current: 701/42
• CPC Class Codes: B60D 1/245 for facilitating push back or parking of trailers
• CPC Class Codes: B60D 1/62 involving supply lines, electric circuits, or the like
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 2300/14 Tractor-trailers, i.e. combinations of a towing vehicle and one or more towed vehicles, e.g. caravans; Road trains
• CPC Class Codes: B60W 2520/22 Articulation angle, e.g. between tractor and trailer
• CPC Class Codes: B60W 30/00 Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
• CPC Class Codes: B60W 30/02 Control of vehicle driving stability
• CPC Class Codes: B60W 30/045 Improving turning performance
• CPC Class Codes: B62D 13/06 for backing a normally drawn trailer
• CPC Class Codes: B62D 15/027 Parking aids, e.g. instruction means
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

In one embodiment of the disclosed subject matter, a trailer backup assist system includes a sensor that senses a measured hitch angle between a vehicle and a trailer. The system also provides an input module that receives a desired curvature of the trailer. A controller of the system includes a curvature regulator determining a desired hitch angle based on the desired curvature and a steering angle of the vehicle. In addition, the controller of the system includes a hitch angle regulator generating a steering angle command based on the desired hitch angle and the measured hitch angle. In this embodiment, the controller is configured to operate the trailer backup assist system irrespective of the attached trailer having a conventional tongue or a gooseneck tongue.

Claims

1. A trailer backup assist system comprising:

a hitch sensor sensing a measured hitch angle between a vehicle and a gooseneck trailer;

a steering sensor sensing a steering angle of the vehicle;

an input module receiving a desired curvature of the gooseneck trailer; and

a controller generating a steering angle command for the vehicle as a function of the measured hitch angle, the steering angle, and the desired curvature.

2. The trailer backup assist system of claim 1, wherein the controller includes a hitch angle regulator having feedback linearization for generating the steering angle command for the vehicle based on a desired hitch angle, the measured hitch angle, and a velocity of the vehicle.

3. The trailer backup assist system of claim 2, wherein the hitch angle regulator prevents the desired hitch angle from exceeding a jackknife angle.

4. The trailer backup assist system of claim 2, wherein the controller includes a curvature regulator for determining the desired hitch angle based on the desired curvature, the steering angle, and kinematic information of the gooseneck trailer and the vehicle.

5. The trailer backup assist system of claim 4, wherein the input module includes a rotational control input device that is rotatable between a first position corresponding to a first curvature of the trailer and a second position corresponding to a second curvature of the trailer.

6. The trailer backup assist system of claim 1, wherein a distance is defined between a rear axle of the vehicle and a pivoting connection between the vehicle and the gooseneck trailer, such that the controller is configured to generate the steering angle command consistent with the desired curvature when the distance is substantially equal to zero.

7. The trailer backup assist system of claim 1, wherein the gooseneck trailer couples with the vehicle at a fifth wheel connector proximate a rear axle of the vehicle, defining a pivoting connection substantially aligned with the rear axle of the vehicle, and wherein the controller generates the steering angle command as a function independent of a distance between the rear axle and the pivoting connection.

8. A trailer backup assist system comprising:

a sensor sensing a measured hitch angle between a vehicle and a trailer;

an input module receiving a desired curvature of the trailer; and

a controller comprising;

a curvature regulator determining a desired hitch angle based on the desired curvature and a steering angle of the vehicle; and

a hitch angle regulator generating a steering angle command based on the desired hitch angle and the measured hitch angle.

9. The trailer backup assist system of claim 8, wherein the hitch angle regulator includes a PI controller having gain terms based on a length of the trailer.

10. The trailer backup assist system of claim 9, wherein the hitch angle regulator includes feedback linearization for generating the steering angle command based on the desired hitch angle, the measured hitch angle, and a velocity of the vehicle.

11. The trailer backup assist system of claim 8, wherein the hitch angle regulator prevents the desired hitch angle from exceeding a jackknife angle.

12. The trailer backup assist system of claim 8, wherein the curvature regulator determines the desired hitch angle based on kinematic information of the vehicle and the trailer.

13. The trailer backup assist system of claim 8, wherein the curvature regulator determines the desired hitch angle based on the steering angle as determined by the hitch angle regulator.

14. The trailer backup assist system of claim 8, wherein the input module includes a trajectory planner that generates a path for the trailer with the desired curvature provided along the path.

15. The trailer backup assist system of claim 8, wherein the trailer includes a gooseneck tongue that couples with the vehicle proximate a rear axle of the vehicle, such that a distance between the rear axle of the vehicle and a pivoting connection between the vehicle and the trailer is substantially equal to zero.

16. A method for operating a trailer backup assist system, comprising:

sensing a measured hitch angle between a vehicle and a trailer;

sensing a steering angle of the vehicle;

receiving a desired curvature of the trailer;

determining a desired hitch angle based on the desired curvature and the steering angle; and

generating a steering angle command for the vehicle using feedback linearization and based on the desired hitch angle and the measured hitch angle.

17. The trailer backup assist system of claim 16, wherein the steering angle command is generated based on a velocity of the vehicle.

18. The trailer backup assist system of claim 16, further comprising:

determining a jackknife angle based on a length of the trailer and preventing the desired hitch angle from exceeding the jackknife angle.

19. The trailer backup assist system of claim 16, wherein the desired curvature is provided by a trajectory planner that generates a path for the trailer with the desired curvature provided along the path.

20. The trailer backup assist system of claim 16, wherein a distance is defined longitudinally between a rear axle of the vehicle and a pivoting connection between the a hitch ball on the vehicle and a gooseneck tongue on the trailer, such that the steering angle command is generated consistent with the desired curvature when the distance is substantially equal to zero.