Rudder-assisted steering for self-propelled drainage equipment

Patent metadata

Field	Value
Publication number	US-9242669-B2
Application number	US-201414255550-A
Country	US
Kind code	B2
Filing date	Apr 17, 2014
Priority date	Apr 17, 2014
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

Novel tools and techniques for performing steering operations for a tracked vehicle with a dragged implement using a control system that uses a combination of differential steering and rudder steering based on one or more operating conditions of the vehicle.

First claim

What is claimed is:

1. A vehicle, comprising:
a chassis;
two tracks coupled with the chassis and configured to provide differential steering for the vehicle;
a dragged implement coupled with the chassis by a coupling mechanism; and
a control system comprising a processor and a non-transitory computer readable medium having encoded thereon a set of instructions executable by the processor to operate the control system, the set of instructions comprising:
instructions to receive a steering input;
instructions to identify one or more operating conditions of the vehicle;
instructions to determine, based on the one or more operating conditions of the vehicle, a combination of differential steering and rudder steering to perform a steering operation;
instructions to control the two tracks to apply the determined combination of differential steering and rudder steering to perform the steering operation; and
instructions to control the dragged implement to apply the determined combination of differential steering and rudder steering to perform the steering operation.

2. The vehicle of claim 1 , wherein the dragged implement is a tile plow to install drainage tile in an agricultural area.

3. The vehicle of claim 1 , wherein the dragged implement is integrated with the vehicle and is permanently coupled with the vehicle by the coupling mechanism.

4. The vehicle of claim 1 , wherein the dragged implement is a towed implement that is removably coupled with the chassis by the coupling mechanism.

5. The vehicle of claim 1 , wherein the determined combination of differential steering and rudder steering consists entirely of rudder steering, wherein the instructions to control the two tracks comprise instructions to maintain a consistent track speed between the two tracks, and wherein the instructions to control the dragged implement comprise instructions to maintain the dragged implement at a specified angle to the chassis to perform the steering operation.

6. The vehicle of claim 1 , wherein the determined combination of differential steering and rudder steering consists entirely of differential steering, wherein the instructions to control the dragged implement comprise instructions to allow the dragged implement to rotate freely about the coupling mechanism and relative the chassis, and wherein the instructions to control the two tracks comprise instructions to modify a speed of at least one of the tracks to perform the steering operation.

7. The vehicle of claim 1 , wherein the coupling mechanism comprises one or more hydraulic pistons, and wherein controlling the dragged implement comprises controlling at least one of the hydraulic pistons to control a position of the dragged implement relative the chassis.

8. The vehicle of claim 1 , wherein the steering input comprises manipulation of a steering control by an operator.

9. The vehicle of claim 1 , wherein the steering input comprises input received from a navigation system.

10. The vehicle of claim 6 , wherein the control system comprises the navigation system.

11. The vehicle of claim 6 , wherein the control system operates the vehicle to conform to a drainage tile layout plan based on input received from the navigation system.

12. The vehicle of claim 1 , wherein the instructions to identify one or more operating conditions comprise instructions to identify the one or more operating conditions based at least in part on input received from sensors on the vehicle.

13. The vehicle of claim 1 , wherein the instructions to identify one or more operating conditions comprise instructions to identify the one or more operating conditions based at least in part on operator input.

14. The vehicle of claim 1 , wherein the one or more operating conditions comprise a radius of a turn that the vehicle will undertake.

15. The vehicle of claim 1 , wherein the one or more operating conditions comprise an amount of traction available to at least one of the tracks.

16. The vehicle of claim 1 , wherein the one or more operating conditions comprise an angle between the dragged implement and the chassis.

17. The vehicle of claim 13 , wherein the instructions to determine a combination of differential steering and rudder steering comprise instructions to compare the angle with one or more thresholds.

18. The vehicle of claim 14 , wherein the control system comprises a user interface, and wherein the set of instructions further comprises:
instructions to receive, via the user interface, input from an operator to define at least one of the one or more thresholds.

19. The vehicle of claim 1 , further comprising a controller area network (“CAN”) bus, wherein the instructions to control the dragged implement comprise instructions to communicate with the coupling mechanism via the CAN bus.

20. A method of steering a vehicle, the method comprising:
receiving, with a control system of the vehicle, a steering input;
identifying, with the control system, one or more operating conditions of the vehicle;
determining, with the control system and based on the one or more operating conditions of the vehicle, a combination of differential steering and rudder steering to perform a steering operation;
controlling, with the control system, one or more tracks to apply the determined combination of differential steering and rudder steering to perform the steering operation; and
controlling, with the control system, a dragged implement to apply the determined combination of differential steering and rudder steering to perform the steering operation.

21. A control system for a vehicle, the control system comprising:
one or more processors; and
a computer readable medium in communication with the one or more processors, the computer readable medium having encoded thereon a set of instructions executable by the computer system to perform one or more operations, the set of instructions comprising:
instructions to receive a steering input;
instructions to identify one or more operating conditions of the vehicle;
instructions to determine, based on the one or more operating conditions of the vehicle, a combination of differential steering and rudder steering to perform a steering operation;
instructions to control one or more tracks of the vehicle to apply the determined combination of differential steering and rudder steering to perform the steering operation; and
instructions to control a dragged implement to apply the determined combination of differential steering and rudder steering to perform the steering operation.

Assignees

• Trimble Navigation Ltd

Inventors

• Shuler Joshua W

Classifications

• B62D11/00 Primary

  Steering non-deflectable wheels; Steering endless tracks or the like · CPC title

• A01B69/003

  Steering or guiding of machines or implements pushed or pulled by or mounted on agricultural vehicles such as tractors, e.g. by lateral shifting of the towing connection · CPC title

• B62D6/00 Primary

  Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits (means for initiating a change in direction B62D1/00; steering valves B62D5/06; combined with means for inclining the vehicle body or wheels on bends B62D9/00) · CPC title

• B62D11/02

  by differentially driving ground-engaging elements on opposite vehicle sides · CPC title

• A01B69/007

  Steering or guiding of agricultural vehicles, e.g. steering of the tractor to keep the plough in the furrow · CPC title