Control actuation smoothing

Patent metadata

Field	Value
Publication number	US-9577850-B2
Application number	US-201414532617-A
Country	US
Kind code	B2
Filing date	Nov 4, 2014
Priority date	Jul 18, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

The present disclosure relates to control actuation smoothing, and more particularly, to a control actuation smoothing system that smoothes brake actuation. The smoothing may be determined in response to a filter. In various embodiments, the smoothing may enhance brake component performance.

First claim

What is claimed is:

1. A method of control actuation smoothing comprising:
receiving, by an aircraft brake and steering controller (“ABSC”) comprising a processor and a non-transitory memory, target performance data;
receiving, by the ABSC, a force command comprising a braking instruction;
comparing, by the ABSC, the force command to an expected brake behavior;
determining, by the ABSC, an error between the force command and the expected brake behavior;
filtering, by the ABSC, the force command in response to the error and target performance data;
outputting, by the ABSC, a smoothed force command in response to the filtering; and
translating, by the ABSC and via an electric brake actuator, a brake assembly based on the smoothed force command, the translating the brake assembly occurring after the outputting the smoothed force command.

2. The method according to claim 1 , wherein the target performance data comprises a precedent force command.

3. The method according to claim 2 , wherein the precedent force command comprises a smoothed brake instruction output by the ABSC earlier in time than the force command.

4. The method according to claim 1 , wherein the target performance data comprises brake assembly position data.

5. The method according to claim 1 , wherein the braking instruction comprises an approximate step function, and wherein the smoothed force command comprises a first-order approximation.

6. The method according to claim 5 , wherein filtering comprises reshaping the first-order approximation based on at least one of: target performance data, expected brake system response, and safety aspects.

7. A control actuation smoothing system comprising:
a filter;
a target performance data input comprising a logical input in communication with target performance data and the filter;
a control data input comprising a logical input in logical communication with a control data source and the filter, whereby a force command may be received by the filter;
a smoothed force command output comprising a logical output in communication with the filter and an electric brake actuator, whereby a smoothed force command may be output by the filter,
wherein the filter is configured to determine the smoothed force command by comparing the force command with an expected brake behavior, determining an error between the force command and the expected brake behavior, and filtering the force command in response to the error and the target performance data; and
a brake assembly configured to translate after receiving the smoothed force command output, and configured to translate based on the smoothed force command output.

8. The control actuation smoothing system of claim 7 , wherein the filter comprises a first order approximation filter.

9. The control actuation smoothing system of claim 7 , wherein the target performance data comprises at least one precedent smoothed force command.

10. The control actuation smoothing system of claim 9 , wherein the precedent smoothed force command is output by an ABSC earlier in time than the force command.

11. The control actuation smoothing system of claim 7 , wherein the target performance data comprises at least one precedent force command.

12. The control actuation smoothing system of claim 7 , wherein the filter comprises a digital signal processor.

13. The control actuation smoothing system of claim 7 , wherein the control data source comprises an electric brake actuator controller.

14. The control actuation smoothing system of claim 7 , wherein the control data source comprises a controller area network bus disposed in logical communication with an electric brake actuator controller.

15. The control actuation smoothing system of claim 7 , further comprising a second electric brake actuator in logical communication with the smoothed force command output.

Assignees

• Goodrich Corp

Inventors

• Ayichew Efrem E
• Abbott Michael

Classifications

• B60T8/1703 Primary

  for aircrafts · CPC title

• B60T13/741

  acting on an ultimate actuator · CPC title

• B64C25/46

  Brake regulators for preventing skidding or aircraft somersaulting · CPC title

• H04L25/03261 Primary

  with impulse-response shortening filters · CPC title

• B64C25/44

  Actuating mechanisms · CPC title