Antiskid operation during degraded operation
AssigneeGoodrich Corporation
InventorEric Daniel Cahill
Life of this patent
Estimating the term…
Abstract
A braking system may include a controller, a first wheel and a second wheel. The first wheel may be laterally displaced from the second wheel by a first distance. A first wheel speed sensor may be coupled to the first wheel and a second wheel sensor may be coupled to the second wheel. The controller may be configured to determine at least one of a slip ratio, a coefficient of friction, or a braking pressure of the second wheel in response to failure of the first wheel speed sensor. The controller may be configured to calculate a consistency value of the at least one of the slip ratio, the coefficient of friction, or the braking pressure. The controller may be configured to adjust a braking pressure of the first wheel speed sensor based upon the consistency value and the first distance.
Claims9
A braking system comprising:
- a controller;
- a first wheel and a second wheel, the first wheel laterally displaced from the second wheel by a first distance;
- and
- a third wheel, the third wheel laterally displaced from the second wheel;
- a first wheel speed sensor coupled to the first wheel, a second wheel sensor coupled to the second wheel, and a third wheel sensor coupled to the third wheel;
- wherein the controller is configured to determine a braking data comprising at least one of a slip ratio, a coefficient of friction, or a braking pressure of the second wheel and the third wheel in response to failure of the first wheel speed sensor;
- wherein the controller is configured to calculate a consistency value of the at least one of the slip ratio, the coefficient of friction, or the braking pressure, wherein the consistency value comprises a standard deviation of a sample of the braking data for the second wheel and the braking data for the third wheel;
- wherein the consistency value is determined using a weighting factor with the at least one of the slip ratio, the coefficient of friction, or the braking pressure associated with the third wheel;
- and
- wherein the controller is configured to adjust a braking pressure applied to the first wheel based upon the consistency value and the first distance.
A method comprising:
- determining, by a controller, a braking data comprising at least one of a slip ratio, a coefficient of friction, or a braking pressure of a second wheel and a third wheel in response to failure of a first wheel speed sensor coupled to a first wheel, the first wheel being laterally displaced from the second wheel by a first distance, and the third wheel being laterally displaced from the second wheel;
- calculating, by the controller, a consistency value of the at least one of the slip ratio, the coefficient of friction, or the braking pressure associated with the second wheel, wherein the consistency value comprises a standard deviation of a sample of the braking data for the second wheel and the braking data for the third wheel;
- weighting, by the controller, the at least one of the slip ratio, the coefficient of friction, or the braking pressure associated with the third wheel in the calculating the consistency value;
- and
- adjusting, by the controller, a braking pressure applied to the first wheel based upon the consistency value and the first distance.
Dependencies are inferred from the claim text.