Systems and methods for monitoring a health status of a servo valve

Patent metadata

Field	Value
Publication number	US-10442422-B2
Application number	US-201715852800-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 22, 2017
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

Braking control systems and methods, such as for an aircraft, use a first pressure sensor and a second pressure sensor from a non-primary braking system to validate the first pressure sensor. In response to the first pressure sensor being validated, a health status of a servo valve is monitored based on predetermined characteristics about the servo valve, including electrical current input into the servo valve and hydraulic pressure output from the servo valve.

First claim

What is claimed is:

1. A brake control system for monitoring a health status of a servo valve, comprising:
a non-transitory memory configured to store instructions; and
a controller in electronic communication with the memory, the controller configured to:
receive a first hydraulic pressure signal from a first pressure sensor in communication with a brake actuator;
receive a second hydraulic pressure signal from a second pressure sensor in a non-primary braking system in communication with the brake actuator;
compare the first hydraulic pressure signal and second hydraulic pressure signal according to predetermined criteria;
validate the first pressure sensor based on the comparison; and
in response to the first pressure sensor being validated, monitor the health status of the servo valve in communication with the brake actuator based on predetermined criteria.

2. The system of claim 1 , wherein the first hydraulic pressure signal is independent of the second hydraulic pressure signal and the first pressure sensor is independent of the second pressure sensor.

3. The system of claim 1 , wherein the controller is configured to validate the first pressure sensor by comparing the first hydraulic pressure signal and the second hydraulic pressure signal over multiple readings thereof over time.

4. The system of claim 1 , wherein the controller is configured to signal an alert in response to differences between the first hydraulic pressure signal and the second hydraulic pressure signal.

5. The system of claim 1 , wherein the controller is configured to signal an alert in response to the health status of the servo valve.

6. The system of claim 1 , wherein monitoring the health status of the servo valve in communication with the brake actuator based on predetermined criteria comprises comparing an electric current signal input into the servo valve as converted into a hydraulic pressure signal and the first hydraulic pressure signal.

7. The system of claim 1 , wherein the brake actuator is configured to actuate a braking force on a wheel of an aircraft in response to one or more system inputs representing one or more brake commands.

8. A system for monitoring a health status of a servo valve, comprising
a brake control unit;
a non-transitory memory configured to store instructions; and
a controller in electronic communication with the memory, the controller configured to control the brake control unit by:
receiving a first hydraulic pressure signal from a first pressure sensor in communication with a brake actuator;
receiving a second hydraulic pressure signal from a second pressure sensor in a non-primary braking system in communication with the brake actuator;
comparing the first hydraulic pressure signal and second hydraulic pressure signal according to predetermined criteria;
validating the first pressure sensor based on the comparison; and
in response to the first pressure sensor being validated, monitoring the health status of the servo valve in communication with the brake actuator based on predetermined criteria.

9. The system of claim 8 , wherein the first hydraulic pressure signal is independent of the second hydraulic pressure signal and the first pressure sensor is independent of the second pressure sensor.

10. The system of claim 8 , wherein the controller is configured to validate the first pressure sensor by comparing the first hydraulic pressure signal and the second hydraulic pressure signal over multiple readings thereof over time.

11. The system of claim 8 , wherein the controller is configured to signal an alert in response to differences between the first hydraulic pressure signal and the second hydraulic pressure signal.

12. The system of claim 8 , wherein the controller is configured to signal an alert in response to the health status of the servo valve.

13. The system of claim 8 , wherein monitoring the health status of the servo valve in communication with the brake actuator based on predetermined criteria comprises comparing an electric current signal input into the servo valve as converted into a hydraulic pressure signal and the first hydraulic pressure signal.

14. The system of claim 8 , wherein the brake actuator is configured to actuate a braking force on a wheel of an aircraft in response to one or more system inputs representing one or more brake commands.

15. A method for monitoring a servo valve, comprising:
receiving a first hydraulic pressure signal from a first pressure sensor in communication with a brake actuator;
receiving a second hydraulic pressure signal from a second pressure sensor in a non-primary braking system in communication with the brake actuator;
comparing the first hydraulic pressure signal and second hydraulic pressure signal according to predetermined criteria;
validating the first pressure sensor based on the comparison; and
in response to the first pressure sensor being validated, monitoring the health status of the servo valve in communication with the brake actuator based on predetermined criteria.

16. The method of claim 15 , wherein the first hydraulic pressure signal is independent of the second hydraulic pressure signal and the first pressure sensor is independent of the second pressure sensor.

17. The method of claim 15 , further comprising validating the first pressure sensor by comparing the first hydraulic pressure signal and the second hydraulic pressure signal over multiple readings thereof over time.

18. The method of claim 15 , further comprising signaling an alert in response to differences between the first hydraulic pressure signal and the second hydraulic pressure signal.

19. The method of claim 15 , further comprising signaling an alert in response to the health status of the servo valve.

20. The method of claim 15 , wherein monitoring the health status of the servo valve in communication with the brake actuator based on predetermined criteria comprises comparing an electric current signal input into the servo valve as converted into a hydraulic pressure signal and the first hydraulic pressure signal.

Assignees

• Goodrich Corp

Inventors

• Kordik Michael
• Georgin Marc

Classifications

• B60T17/22

  Devices for monitoring or checking brake systems; Signal devices · CPC title

• F16K37/0041

  for measuring valve parameters (F16K37/0033 takes precedence) · CPC title

• B60T17/221 Primary

  Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M) · CPC title

• B60T8/1703 Primary

  for aircrafts · CPC title