Controllable suspension architecture for enhanced armoured vehicle survivability

• US 8,376,373 B2
• Filed: 11/22/2010
• Issued: 02/19/2013
• Est. Priority Date: 11/23/2009
• Status: Active Grant

• Current Assignee: General Dynamics Land Systems - Canada Corporation (General Dynamics Corporation)
• Original Assignee: General Dynamics Land Systems Incorporated (General Dynamics Corporation)
• Inventors: Conradie, Daniel Francois
• Primary Examiner(s): BROWN, DREW J
• Application Number:
  US12/951,562
• Publication Number:
  US 20110127733A1
• Time in Patent Office: 820 Days
• Field of Search: 280/5.514, 280/5.5, 280/5.507, 280/5.515
• US Class Current: 280/5.514
• CPC Class Codes: B60G 17/08 Characteristics of fluid dampers adjusting fluid dampers in general F16F9/44 - F16F9/53
• CPC Class Codes: B60G 2300/0262 Multi-axle trucks
• CPC Class Codes: B60G 2300/07 Off-road vehicles
• CPC Class Codes: B60G 2500/10 Damping action or damper
• CPC Class Codes: B60G 2600/184 Semi-Active control means
• CPC Class Codes: B60G 3/06 the arm being rigid
• CPC Class Codes: B60G 3/145 the arm forming the axle housing

Abstract

The present embodiments relate to a semi-active suspension control system that utilizes controllable dampers for the purpose of improving maneuverability and vehicle hull stabilization. The disclosed semi-active control system can work in conjunction with a height management unit and on vehicles having variable ride heights, and hull stability and maneuverability can be achieved regardless of vehicle payload and ride height.

Claims

1. A semi-active suspension control system for stabilizing a vehicle comprising:

a spring element positioned between a portion of a hull and a drive shaft of the vehicle;

a controllable damper element positioned adjacent to the spring element;

a wheel sensor positioned at each wheel station on the vehicle for measuring displacement of each wheel of the vehicle;

a hull sensor positioned on the hull of the vehicle for sensing displacement of the hull; and

a suspension controller for delivering a variable output signal to the controllable damper element, the variable output signal being based on displacement data acquired by the wheel and hull sensors, and effectuating a damping response of the controllable damper,

wherein the suspension controller determines a damping strategy and is adapted to optimize the damping strategy during operation of the vehicle, the damping strategy being a function of vehicle payload and vehicle ride height.

2. The semi-active suspension control system of claim 1, further comprising a height management unit for setting a ride height of the vehicle.

3. The semi-active suspension control system of claim 2, wherein the spring element is a gas spring and the height management unit sets the ride height of the vehicle by adjusting an amount of gas in the gas spring.

4. The semi-active suspension control system of claim 2, further comprising at least one hardware interface box that processes the acquired displacement data to calculate a wheel velocity and a hull velocity over a finite period of time.

5. The semi-active suspension control system of claim 4, wherein the suspension controller uses the wheel and hull velocities to determine the damping strategy.

6. The semi-active suspension control system of claim 4, wherein the variable output signal is delivered to the damper element from the suspension controller and the at least one hardware interface box.

7. The semi-active suspension control system of claim 1, wherein the spring element and the damper element are separate from each other and are oriented substantially parallel to each other.

8. The semi-active suspension control system of claim 1, wherein the spring element and the damper element are coupled to the vehicle hull at different locations at a front portion of the vehicle, and coupled to the vehicle hull at the same location at a rear portion of the vehicle.

9. The semi-active suspension control system of claim 1, wherein the variable output signal is in the form of a variable current.

10. The semi-active suspension control system of claim 9, wherein the damper element functions as a passive damper element having a predetermined damping response when the variable current delivered to the damper element is substantially zero.

11. The semi-active suspension control system of claim 1, wherein the damping strategy is optimized during operation of the vehicle by a comparison of the displacement data acquired by the wheel and hull sensors with expected wheel and hull displacement data.

12. A semi-active suspension control system for stabilizing a multi-axle vehicle comprising:

a plurality of wheels;

a spring element positioned near each wheel of the multi-axle vehicle;

a controllable damper element positioned adjacent to each spring element;

a plurality of wheel sensors for sensing displacement of the wheels, each wheel of the multi-axle vehicle having at least one of the plurality of wheel sensors positioned adjacent thereto;

at least one hull sensor positioned on a hull of the vehicle for sensing displacement of the hull; and

a suspension controller and at least one hardware interface box for delivering a unique variable output signal to each controllable damper element,

the unique variable output signals being based on displacement data acquired by the plurality of wheel sensors and the at least one hull sensor, each of the variable output signals effectuating a damping response of one of the controllable damper elements, and

wherein the suspension controller determines a damping strategy and is adapted to optimize the damping strategy during operation of the vehicle, the damping strategy being a function of vehicle payload and vehicle ride height.

13. The semi-active suspension control system of claim 12, further comprising a height management unit for setting a ride height of the vehicle.

14. The semi-active suspension control system of claim 13, wherein the spring element is a gas spring and the height management unit sets the ride height of the vehicle by adjusting an amount of gas in the gas spring.

15. The semi-active suspension control system of claim 13, wherein the at least one hardware interface box processes the acquired displacement data to calculate a wheel velocity and a hull velocity over a finite period of time.

16. The semi-active suspension control system of claim 15, wherein the suspension controller uses the wheel and hull velocities as an input to determine the damping strategy.

17. The semi-active suspension control system of claim 12, wherein the variable output signals are delivered to the controllable damper elements from the suspension controller and the at least one hardware interface box.

18. The semi-active suspension control system of claim 12, wherein the spring elements and the damper elements are separate from each other and are oriented substantially parallel to each other.

19. The semi-active suspension control system of claim 12, wherein the spring elements and the damper elements are coupled to the vehicle hull at different locations at a front portion of the vehicle, and coupled to the vehicle hull at the same location at a rear portion of the vehicle.

20. The semi-active suspension control system of claim 12, wherein the variable output signals are in the form of variable currents.

21. The semi-active suspension control system of claim 20, wherein the damper elements function as passive damper elements with a predetermined damping response when the variable currents delivered to the damper elements are substantially zero.