System for reducing roll and pitch in a moving vehicle

• US 9,463,678 B2
• Filed: 02/15/2013
• Issued: 10/11/2016
• Est. Priority Date: 02/15/2012
• Status: Active Grant

• Current Assignee: Floor Master
• Original Assignee: Floor Master
• Inventors: Voet, Hans, Degezelle, Pascal
• Primary Examiner(s): Trivedi, Atul
• Application Number:
  US14/373,987
• Publication Number:
  US 20150039184A1
• Time in Patent Office: 1,334 Days
• Field of Search: 701/38
• US Class Current: 1/1
• CPC Class Codes: B60G 17/0165 to an external condition, e.g. rough road surface, side wind
• CPC Class Codes: B60G 2300/022 Fork lift trucks, Clark
• CPC Class Codes: B60G 2400/82 Ground surface

Abstract

A vehicle is disclosed designed for traveling on a traveling surface. The vehicle comprises a detection means for detecting irregularities in the traveling surface. From the detected irregularities in the traveling surface a first kinematic effect is calculated that is being exerted, or about to be exerted, on a support wheel of the vehicle. The vehicle further comprises an actuator that exerts a second kinematic effect on the support wheel. The second kinematic effect is identical or similar in magnitude to the first kinematic effect, and opposite in sign. The vehicle can be any vehicle, in particular an industrial vehicle, more particularly a vehicle that can be extended to a height exceeding its wheelbase.

Claims

1. A vehicle comprising a chassis;

at least a first wheel in contact with a traveling surface;

a detector for detecting a surface characteristic of the traveling surface;

a data processor for calculating from the surface characteristic a vertical component of a first kinematic effect being exerted or about to be exerted on the at least one wheel by the traveling surface;

an actuator for exerting a second kinematic effect on the first wheel, said second kinematic effect being equal to or approximately equal to, and opposite in sign, to the first kinematic effect.

2. The vehicle of claim 1 which further comprises a sensor for determining a traveling speed of the vehicle, and wherein the processor uses the traveling speed of the vehicle in calculating the first kinematic effect.

3. The vehicle of claim 1 wherein the first kinematic effect is a velocity or a vertical component of a velocity.

4. The vehicle of claim 1 wherein the first kinematic effect is an acceleration or a vertical component of an acceleration.

5. The vehicle of claim 1 wherein the surface characteristic is a first derivative of a vertical profile of the traveling surface.

6. The vehicle of claim 1 wherein the surface characteristic is a second derivative of a vertical profile of the traveling surface.

7. The vehicle of claim 1 further comprising a feedback mechanism for correcting systematic errors in the first kinematic effect.

8. The vehicle of claim 7 wherein the feedback mechanism comprises a measurement relative to a reference external to the vehicle.

9. The vehicle of claim 1 comprising a second wheel in contact with the traveling surface, and a second detector for detecting a surface characteristic associated with the traveling surface, said second detector being associated with said second wheel.

10. The vehicle of claim 9 further comprising a second actuator acting on said second wheel.

11. The vehicle of claim 9 wherein the first wheel and the second wheel have a common axis.

12. The vehicle of claim 9 comprising a third wheel in contact with the traveling surface, and a third detector for detecting a surface characteristic associated with the traveling surface, said third detector being associated with said third wheel.

13. The vehicle of claim 12 wherein the first wheel and the second wheel have a common axis, and the third wheel has an axis different from the common axis.

14. The vehicle of claim 1 further comprising a safety mechanism for overriding the actuator or actuators.

15. A vehicle comprising a chassis;

at least two wheels on opposite sides of the chassis in contact with a traveling surface, each of said two wheels being associated with a detector for detecting a surface characteristic of the traveling surface;

a data processor for calculating from the surface characteristics vertical components of primary kinematic effects being exerted or about to be exerted on the at least two wheels; and

actuators associated with the at least two wheels for exerting secondary kinematic effects designed to counteract the primary kinematic effects.

16. The vehicle of claim 15 further comprising a feedback mechanism comprising an inclinometer.

17. The vehicle of claim 16 wherein the feedback mechanism generates a correction signal that is split evenly between the two actuators, with opposite signs.