Plough

1. A plough comprising:

a frame;

a ground engaging tool that is connected to the frame;

an actuator mechanism configured to control a roll angle of the frame, wherein the actuator mechanism comprises a turning actuator coupled to the frame and to a headstock of the plough, and the turning actuator is configured to rotate the frame about a longitudinal axis relative to the headstock to control the roll angle of the frame; and

a controller configured to:

receive ground-contour-data that is representative of contours of a field that the plough is to work; and

determine an actuator-control-signal for the actuator mechanism based on the ground-contour-data, wherein the actuator-control-signal is for setting the roll angle of the frame.

2. The plough of claim 1 , wherein the actuator-control-signal is for setting the roll angle of the frame such that it is aligned with the ground that it is processing.

3. The plough of claim 1 , wherein:

the actuator mechanism is configured to set the orientation of the frame relative to a vehicle that is driving the plough; and

the controller is configured to determine the actuator-control-signal also based on vehicle-orientation-data that is representative of the orientation of the vehicle.

4. The plough of claim 3 , wherein the vehicle-orientation-data is representative of a roll angle of the vehicle.

5. The plough of claim 1 , wherein the ground-contour-data comprises lateral-contour-data that is representative of lateral contours of the ground that is to be processed by the plough, or is already being processed by the plough.

6. The plough of claim 5 , wherein the lateral-contour-data comprises averaged contour data.

7. The plough of claim 6 , wherein the lateral-contour-data comprises averaged contour data, that is averaged over the width of the plough.

8. The plough of claim 1 , wherein the ground-contour-data comprises sensed-contour-data that is representative of sensed parameters that are generated by one or more sensors.

9. The plough of claim 8 , wherein the ground-contour-data comprises a sensed-contour-distance-offset that is representative of a distance between (i) the location of the ground contours that are identified by the ground-contour-data and (ii) a predetermined part of the plough, and wherein the controller is configured to:

receive a plough-speed-value, which is representative of a speed of the plough; and

provide the actuator-control-signal to the actuator mechanism at an instant in time that is based on the sensed-contour-distance-offset and the plough-speed-value.

10. The plough of claim 1 , wherein the ground-contour-data comprises stored-contour-data that is representative of ground contour information that is stored in memory.

11. The plough of claim 8 , wherein the ground-contour-data comprises contour-location-data that is representative of the location of the ground contours that are identified by the ground-contour-data, and wherein the controller is configured to:

receive plough-location-data that is representative of the location of the plough in the field; and

provide the actuator-control-signal to the actuator mechanism based on a comparison of the plough-location-data and the contour-location-data.

12. The plough of claim 1 , wherein the actuator mechanism is configured to control a pitch angle of the frame, and the actuator-control-signal is for setting the pitch angle of the frame.

13. A computer-implemented method of operating a plough, the plough comprising:

a frame;

a ground engaging tool that is connected to the frame; and

an actuator mechanism configured to control a roll angle of the frame, wherein the actuator mechanism comprises a turning actuator coupled to the frame and to a headstock of the plough, and the turning actuator is configured to rotate the frame about a longitudinal axis relative to the headstock to control the roll angle of the frame;

wherein the method comprises:

receiving ground-contour-data that is representative of contours of a field that the plough is to work; and

determining an actuator-control-signal for the actuator mechanism based on the ground-contour-data, wherein the actuator-control-signal is for setting the roll angle of the frame.

14. The method of claim 13 , wherein the actuator-control-signal is for setting the roll angle of the frame such that it is aligned with the ground that it is processing.

15. A plough comprising:

a frame;

a ground engaging tool that is connected to the frame;

an actuator mechanism configured to control a pitch angle of the frame, wherein the actuator mechanism comprises a depth-wheel-adjustable-linkage configured to control a height of a rear portion of the frame relative to a ground surface; and

a controller configured to:

receive ground-contour-data that is representative of contours of a field that the plough is to work; and

determine an actuator-control-signal for the actuator mechanism based on the ground-contour-data, wherein the actuator-control-signal is for setting the pitch angle of the frame.

16. The method of claim 15 , wherein the actuator mechanism is configured to control a roll angle of the frame, and the actuator-control-signal is for setting the roll angle of the frame.

17. The method of claim 16 , wherein the actuator mechanism comprises a turning actuator coupled to the frame and to a headstock of the plough, and the turning actuator is configured to rotate the frame about a longitudinal axis relative to the headstock to control the roll angle of the frame.

18. The plough of claim 12 , wherein the actuator mechanism comprises a depth-wheel-adjustable-linkage that is configured to control a height of a rear portion of the frame relative to a ground surface.