Silage compactor

1. A vehicle comprising:

a frame;

a tractive element coupled to the frame;

a prime mover coupled to the frame and configured to drive the tractive element to propel the vehicle; and

a silage compactor, comprising:

a wheel rotatably coupled to the frame and positioned to engage silage positioned below the frame;

a vibrator coupled to the wheel and configured to cause the wheel to vibrate;

a silage sensor configured to provide information indicating a depth of the silage, the depth of the silage being measured from a bottom surface of the silage to a top surface of the silage; and

a controller configured to control the vibrator to vibrate the wheel while the wheel is in contact with the silage to compress the silage, wherein the controller is configured to vary a vibrational characteristic of the vibrator in response to the depth of the silage exceeding a threshold depth.

2. The vehicle of claim 1 , wherein the wheel is coupled to the prime mover, and wherein the prime mover is configured to drive the wheel to propel the vehicle.

3. The vehicle of claim 2 , further comprising a hub rotatably coupled to the frame, wherein the wheel is removably coupled to the hub, and wherein the tractive element is configured to be removably coupled to the hub.

4. The vehicle of claim 3 , wherein the hub is configured to rotate about an axis of rotation, wherein at least one of:

(a) the wheel defines a plurality of first fastener apertures radially offset from the axis of rotation and configured to receive a plurality of first fasteners to couple the wheel to the hub; or

(b) the silage compactor includes a coupler coupled to the wheel and the coupler defines a plurality of second fastener apertures radially offset from the axis of rotation and configured to receive a plurality of second fasteners to couple the coupler to the hub.

5. The vehicle of claim 1 , further comprising a pump structured to receive rotational mechanical energy from the prime mover and provide pressurized hydraulic fluid, and wherein the vibrator includes a hydraulic actuator that is fluidly coupled to the pump.

6. The vehicle of claim 1 , wherein the controller is configured to vary the vibrational characteristic of the vibrator in response to an input from an operator.

7. The vehicle of claim 6 , further comprising an operator interface operatively coupled to the controller, wherein the controller is configured to vary the vibrational characteristic of the vibrator in response to the operator interacting with the operator interface.

8. The vehicle of claim 6 , wherein the vibrator includes a motor and a weight coupled to the motor, the weight having a center of mass that is offset from an axis of rotation of the motor, and wherein the controller is configured to vary the vibrational characteristic by varying a rotational speed of the motor.

9. The vehicle of claim 6 , wherein the vibrator includes:

a motor;

a weight coupled to the motor, the weight having a center of mass that is offset a distance from an axis of rotation of the motor; and

a weight actuator coupled to the motor and the weight and configured to vary the distance between the center of mass and the axis of rotation,

wherein the controller is configured to vary the vibrational characteristic by varying the distance between the center of mass and the axis of rotation.

10. The vehicle of claim 1 , wherein the silage compactor further comprises an isolator coupling the wheel to the frame and configured to inhibit transmission of vibrations from the wheel to the frame.

11. The vehicle of claim 10 , wherein the isolator includes a section of compliant material.

12. The vehicle of claim 10 , wherein the isolator includes a damper.

13. The vehicle of claim 1 , wherein the wheel defines a volume containing ballast, and wherein the ballast is configured to move relative to the wheel as the wheel rotates.

14. The vehicle of claim 13 , wherein the ballast is a liquid.

15. A silage compactor for a vehicle, comprising:

a wheel;

an isolator rotatably coupling the wheel to a frame of the vehicle and configured to inhibit transmission of vibrations from the wheel to the frame;

a vibrator coupled to the wheel and configured to cause the wheel to vibrate; and

a controller configured to:

receive a measurement of a depth of silage below the wheel, the depth of the silage being measured from a bottom surface of the silage to a top surface of the silage; and

vary a vibrational characteristic of the vibrator based on the depth of the silage.

16. The silage compactor of claim 15 , further comprising a silage sensor operatively coupled to the controller and configured to provide the indication of the depth of the silage below the wheel, wherein the controller is configured to vary the vibrational characteristic of the vibrator in response to the depth of the silage exceeding a threshold depth.

17. A vehicle comprising:

a frame;

a first hub and a second hub each rotatably coupled to the frame;

a prime mover coupled to the frame and configured to drive at least one of the first hub or the second hub;

a tractive element coupled to the first hub, the tractive element including an inflatable tire;

a wheel coupled to the second hub and positioned to engage silage positioned below the frame;

a vibrator coupled to the wheel, the vibrator including a weight and a motor configured to rotate the weight to cause the wheel to vibrate;

a silage sensor configured to indicate a depth of the silage, the depth of the silage being measured from a bottom surface of the silage to a top surface of the silage; and

a controller configured to vary a vibrational characteristic of the vibrator in response to the depth of the silage exceeding a threshold depth.

18. The vehicle of claim 17 , wherein the tractive element is removably coupled to the first hub, wherein the wheel is configured to be removed from the second hub and coupled to the first hub.

19. The silage compactor of claim 15 , further comprising an operator interface operatively coupled to the controller and configured to provide the indication of the depth of the silage below the wheel.