Simulating rotation of a wheel

• US 8,146,411 B2
• Filed: 03/19/2010
• Issued: 04/03/2012
• Est. Priority Date: 03/19/2010
• Status: Active Grant

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Burgess, Craig L., Green, Joy, Kissling, Stephen
• Primary Examiner(s): Kirkland, III, Freddie
• Application Number:
  US12/727,281
• Publication Number:
  US 20110226049A1
• Time in Patent Office: 746 Days
• Field of Search: 731/150.7, 731/150.8, 731/180.1, 731/180.3, 731/28, 731/30
• US Class Current: 73/118.01
• CPC Class Codes: G09B 9/02 for teaching control of vehicles or other craft

Abstract

A device and method for simulating rotation of a wheel on a vehicle having a rotatable wheel rotation sensor. A motor is coupled to a rotatable portion of the rotation sensor, and is operated to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid.

Claims

1. A test device to simulate rotation of a wheel on a vehicle having a rotatable wheel rotation sensor, the device comprising:

a motor coupleable to a rotatable portion of the rotation sensor; and

a motion controller in communication with the motor to operate the motor to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid.

2. The test device of claim 1, further comprising a wheel hubcap adapter mountable to the vehicle wheel, wherein the motor is coupled to the adapter.

3. The test device of claim 2, wherein the motor includes an output shaft and the test device further comprises a drive coupling coupled to the output shaft and connectable to the rotatable portion of the rotation sensor when the adapter is mounted to the vehicle wheel.

4. The test device of claim 1, wherein the pulse train is defined by at least one of the following wheel skid parameters:

skid speed reduction, skid frequency, skid duration, or skid persistence.

5. The test device of claim 1, wherein the motion controller is configured to operate the motor according to the pulse train, which pulses the motor between on or off, or between a lower speed and a higher speed.

6. The test device of claim 1, wherein the motion controller is configured to operate the motor according to a velocity mode that operates the motor to rotate the rotation sensor at a speed that simulates a desired wheel speed.

8. The test device of claim 1, wherein the motor is a brushless DC stepper motor.

9. The test device of claim 1, further comprising a computer having a motion control software application loaded thereto and being in communication with the controller to control motion of the motor.

10. The test device of claim 1, further comprising:

a wheel hubcap adapter mountable to the vehicle wheel, wherein the motor is coupled to the adapter and the motor includes an output shaft; and

a drive coupling coupled to the output shaft and connectable to the rotatable portion of the rotation sensor when the adapter is mounted to the vehicle wheel.

7. A test device to simulate rotation of a wheel on a vehicle having a rotatable wheel rotation sensor, the device comprising:

a motor coupleable to a rotatable portion of the rotation sensor; and

a motion controller in communication with the motor to operate the motor to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid, wherein the motion controller is configured to operate the motor according to a velocity mode that operates the motor to rotate the rotation sensor at a speed that simulates a desired wheel speed, and wherein the motion controller is configured to drive the motor at speeds suitable to test at least one of the following vehicle system functions;

an aircraft maintenance mode, speed response of a speed-sensitive aircraft nose wheel steering system, or response of an aircraft braking system to brake application to simulate a rejected take off.

11. A test device to simulate rotation of a wheel on a vehicle having a rotatable wheel rotation sensor, the device comprising:

a motor coupleable to a rotatable portion of the rotation sensor;

a motion controller in communication with the motor to operate the motor to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid;

a wheel hubcap adapter mountable to the vehicle wheel, wherein the motor is coupled to the adapter and the motor includes an output shaft;

a drive coupling coupled to the output shaft and connectable to the rotatable portion of the rotation sensor when the adapter is mounted to the vehicle wheel; and

a protective housing including a case and a cover coupled to the case, and in which are disposed one or more components of the test device including the adapter, the motor, the drive coupling, the motion controller, a user interface, and a computing device in communication with the user interface and the motion controller and having a motion control software application loaded thereto, wherein the protective housing includes multiple compartments including an electrical compartment having an interface panel with an on/off switch, motor communication couplings, wherein the compartment also houses a transformer coupled to the on/off switch via a fuse, communication break out boxes coupled to the transformer and coupled downstream to a motor driver of the motion controller.

12. A method of simulating rotation of a wheel on a vehicle having a rotatable wheel rotation sensor, comprising:

coupling a motor to a rotatable portion of the rotation sensor; and

operating the motor to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid.

13. The method of claim 12, wherein the pulse train is defined by at least one of the following wheel skid parameters:

skid speed reduction, skid frequency, skid duration, or skid persistence.

14. The method of claim 12 used to facilitate a vehicle system functional test, which includes sensing wheel rotation using the rotatable wheel rotation sensor of the vehicle.

15. The method of claim 12, wherein the motor operating step includes generating the pulse train to pulse the motor between on and off or between a lower speed and a higher speed for testing anti-skid functionality of a vehicle braking system.

16. The method of claim 12, wherein the motor operating step includes operating the motor according to a velocity mode in which the motor is driven to impart a desired simulated wheel speed input.

17. A method of simulating rotation of a wheel on a vehicle having a rotatable wheel rotation sensor, comprising:

coupling a motor to a rotatable portion of the rotation sensor; and

operating the motor to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid, wherein the motor operating step includes operating the motor according to a velocity mode in which the motor is driven to impart a desired simulated wheel speed input, and wherein the motor operating step includes driving the motor in one of a fixed or variable manner to impart a desired simulated wheel speed input for testing at least one of an aircraft maintenance mode, speed-sensitive aircraft nose wheel steering, or response of an aircraft braking system to brake application to simulate a rejected take off.

18. A method of simulating rotation of wheels on a vehicle having rotatable wheel rotation sensors, comprising:

coupling motors to rotatable portions of the rotation sensors;

operating at least one of the motors to rotate at least one of the rotatable portions of at least one of the rotation sensors according to a velocity mode; and

operating another of the motors to rotate another of the rotatable portions of another of the rotation sensors according to a pulse train simulating a single wheel skid.

19. A method of testing vehicle system functionality, comprising:

coupling a motor to a rotatable portion of a vehicle wheel rotation sensor; and

operating the motor to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid; and

sensing wheel rotation using the rotation sensor.