ELECTRIC BRAKING SYSTEM AND METHOD RELYING ON VOLTAGE HYSTERESIS FOR APPLIED BRAKE POWER CONTROL

• US 20160016563A1
• Filed: 02/27/2014
• Published: 01/21/2016
• Est. Priority Date: 03/06/2013
• Status: Active Grant

• Current Assignee: Airbus Canada Limited Partnership
• Original Assignee: Bombardier Incorporated
• Inventors: DI ZAZZO, Marco, PLANTE, Bertrand
• Granted Patent: US 9,656,642 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60T 13/74 with electrical assistance or drive
• CPC Class Codes: B60T 17/22 Devices for monitoring or checking brake systems; Signal devices
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence
• CPC Class Codes: B64C 25/42 Arrangement or adaptation of brakes
• CPC Class Codes: H02P 15/00 Arrangements for controlling dynamo-electric brakes or clutches vector control H02P21/00

Abstract

A method of operating electric brakes for a vehicle including monitoring at least a voltage in a power system of the vehicle, and adjusting a power provided to the electric brakes based on at least the monitored voltage to control a current according to a predetermined behavior.

Claims

1. A method of operating electric brakes for a vehicle, comprising:

monitoring at least a voltage in a power system of the vehicle; and

adjusting a power provided to the electric brakes based on at least the monitored voltage to control a current according to a predetermined behavior.

2. The method of claim 1, wherein the vehicle is an aircraft.

3. The method of claim 1, wherein the method operates according to an increase in the voltage over time and a decrease of the voltage over time, limiting the power to no less than 80% of maximum.

4. The method of claim 3, wherein:

when the voltage is decreasing,

a first current is selected as a function of a first voltage according to a first behavioral zone, wherein the first current and the first voltage exhibit a substantially linear first relationship with a negative slope,

a second current is selected as a function of a second voltage according to a second behavioral zone, wherein the second current and the second voltage exhibit a substantially linear second relationship with a negative slope and wherein the first current is greater than the second current, and

a third current is selected as a function of a third voltage according to a third behavioral zone, wherein the third current and the third voltage exhibit a third linear relationship therebetween.

5. The method of claim 4, wherein the third linear relationship exhibits at least one of a substantially positive slope, a substantially infinite slope, and a substantially negative slope.

6. The method of claim 4, wherein the first voltage is between about 22 to 28 V.

13. The method of claim 3, wherein:

when the voltage is increasing,

a first current is selected as a function of a first voltage according to a first behavioral zone, wherein the first current and the first voltage exhibit a substantially linear first relationship with a negative slope,

a second current is selected as a function of a second voltage according to a second behavioral zone, wherein the second current and the second voltage exhibit a substantially linear second relationship with a negative slope and wherein the first current is greater than the second current, and

a third current is selected as a function of a third voltage according to a third behavioral zone, wherein the third current and the third voltage exhibit a third linear relationship therebetween.

14. The method of claim 13, wherein the third linear relationship exhibits at least one of a substantially positive slope, a substantially infinite slope, and a substantially negative slope.

15. The method of claim 13, wherein the first voltage is between about 24 to 28 V.

7-12. -12. (canceled)

16-21. -21. (canceled)

22. A controller for operating electric brakes for a vehicle according to an executable set of instructions, wherein the controller:

receives at least a voltage in a power system of the vehicle; and

adjusts a power provided to the electric brakes based on at least the monitored voltage to control a current according to a predetermined behavior.

23. The controller of claim 22, wherein the vehicle is an aircraft.

24. The controller of claim 22, wherein the controller responds to an increase in the voltage over time and a decrease of the voltage over time, limiting the power to no less than 80% of maximum.

25. The controller of claim 22, wherein:

when the voltage is decreasing,

a first current is selected as a function of a first voltage according to a first behavioral zone, wherein the first current and the first voltage exhibit a substantially linear first relationship with a negative slope,

a second current is selected as a function of a second voltage according to a second behavioral zone, wherein the second current and the second voltage exhibit a substantially linear second relationship with a negative slope and wherein the first current is greater than the second current, and

a third current is selected as a function of a third voltage according to a third behavioral zone, wherein the third current and the third voltage exhibit a third linear relationship therebetween.

26. The controller of claim 25, wherein the third linear relationship exhibits at least one of a substantially positive slope, a substantially infinite slope, and a substantially negative slope.

27. The controller of claim 25, wherein the first voltage is between about 22 to 28 V.

32. The controller of claim 22, wherein:

when the voltage is increasing,

a first current is selected as a function of a first voltage according to a first behavioral zone, wherein the first current and the first voltage exhibit a substantially linear first relationship with a negative slope,

a second current is selected as a function of a second voltage according to a second behavioral zone, wherein the second current and the second voltage exhibit a substantially linear second relationship with a negative slope and wherein the first current is greater than the second current, and

a third current is selected as a function of a third voltage according to a third behavioral zone, wherein the third current and the third voltage exhibit a third linear relationship therebetween.

33. The controller of claim 32, wherein the third linear relationship exhibits at least one of a substantially positive slope, a substantially infinite slope, and a substantially negative slope.

34. The controller of claim 32, wherein the first voltage is between about 24 to 28 V.

28-31. -31. (canceled)

35-39. -39. (canceled)

40. An executable set of instructions, executable on a controller for operating electric brakes for a vehicle, the executable set of instructions executing a method comprising:

receiving at least a voltage in a power system of the vehicle; and

adjusting a power provided to the electric brakes based on at least the monitored voltage to control a current according to a predetermined behavior.