A method of braking left and right landing gear wheels on respective left and right sides of an aircraft. A desired left braking parameter (L) is received for the left wheel and a desired right braking parameter (R) is received for the right wheel. The left wheel is braked with a reduced left braking parameter (L′) which is less than the desired left braking parameter (L), and the right wheel is braked with a reduced right braking parameter (R′) which is less than the desired right braking parameter (R). A difference between the braking parameters is maintained so that L′−R′=L−R.

An apparatus including a controller configured to generate a first indication for a vehicle braking system depending upon an oxidation state of a wheel brake of the vehicle is disclosed. Also disclosed is a braking system including a controller configured to receive a first indication, the first indication having been generated depending upon an oxidation state of a wheel brake of a vehicle and control the operation of the brake based on the first indication. Also disclosed is a method of controlling at least one brake of an aircraft, and an aircraft including the apparatus, the braking system and a temperature sensor configured to measure a temperature of a wheel brake of the aircraft and to transmit the temperature measurement to the apparatus.

The present disclosure provides a brake system including (a) a brake stack, (b) a force member moveable between a retracted position and an extended position in response to a brake command, wherein the force member contacts the brake stack in the extended position, and wherein the brake system includes a running clearance defined by a distance between the brake stack and the force member in the retracted position, (c) a sensor in communication with the brake stack to measure a force between the force member and the brake stack in response to the brake command, and (d) a brake control unit configured to determine a running clearance brake command defined as a percentage of a maximum braking force that causes the force member to contact the brake stack, wherein the running clearance brake command is determined based on the force measured by the sensor for a plurality of brake commands.

An aircraft brake temperature control system (BTCS) 100 for controlling a temperature of a brake 220 of a landing gear 201 of the aircraft 200. The BTCS 100 includes a controller 110 configured to cause a thermal management system 2000 to regulate the temperature of the brake 220, on the basis of a selection of an objective for regulating the temperature of brake from a plurality of objectives 121, 122 for regulating the temperature of the brake. An aircraft 200 includes the BTCS; and a method 300 controls a temperature of a brake of a landing gear of an aircraft.

An aircraft brake temperature control system (BTCS) 100 for controlling a temperature of a brake 220 of a landing gear 201 of the aircraft 200. The BTCS 100 includes a controller 110 configured to cause at least one fluid moving device 230, 231, 232 to drive a flow of fluid onto the brake 220, selectively in one of a plurality of modes, to control the temperature of the brake 220. The BTCS 100 may be incorporated into an aircraft system 1000 with at least one fluid moving device 230, 231, 232, wherein the aircraft system is on an aircraft 200.

An aircraft braking system for an aircraft, the aircraft including first and second brakes, and first and second energy distribution systems for delivering energy to the first and second brakes to operate the respective first and second brakes. The aircraft braking system is switchable between: a first configuration, in which the first energy distribution system is coupled to the first brake and is isolated from the second brake, and the second energy distribution system is coupled to the second brake and is isolated from the first brake; and a second configuration, in which the first energy distribution system is coupled to both the first and second brakes.

A system may include a processor installed in an aircraft. The processor may be configured to: obtain runway friction coefficient data and runway surface condition data for a runway; obtain braking coefficient data and braking action index data; obtain equivalent runway condition data and runway length data for the runway; obtain aircraft speed data of the aircraft and aircraft configuration data; based at least on the runway friction coefficient data, the runway surface condition data, the braking coefficient data, the braking action index data, the equivalent runway condition data, the aircraft speed data, and the aircraft configuration data, determine a rejected takeoff (RTO) initiating point (RIP) and a start automated RTO sequence point; and cause an automated RTO sequence to be performed if the start automated RTO sequence point is reached without the automated RTO sequence being manually overridden.

A method for active brake selection, in accordance with various embodiments is disclosed. The method comprises detecting an outbound taxiing event for an aircraft. The method further comprises determining whether an inboard or outboard brake has less wear than a respective inboard or outboard brake on a respective landing gear. The method may further comprise selecting an inboard or outboard brake to use during the outbound taxiing event.

An electronic circuit (12) connected to a variable-excitation sensor (24) and comprising: a digital envelope detector (20) arranged to acquire signal that is produced by the sensor in response to an excitation signal, the detector comprising: an analog-to-digital converter (22) arranged to sample the measurement signal in such a manner as to produce sample points during successive observation windows of duration T that comprise a number N.sub.S of sample points, the sample points being spaced apart by a sampling period T.sub.S, the sampling period T.sub.S and the duration T being such that:

T.sub.S=N.sub.P.Math.T.sub.0+(N.sub.T/N.sub.S).Math.T.sub.0 and T=N.sub.S.Math.T.sub.S,

where T.sub.0 is one excitation period of the excitation signal, where N.sub.P, N.sub.T, and N.sub.S are non-zero natural integers, and where N.sub.T is not a multiple of N.sub.S.

Methods for reducing brake wear during aircraft taxiing are disclosed. As one example, a method comprises determining a sequence to apply brakes of a given set of landing gear during a brake event, wherein the determining includes selecting a warmer brake of the brakes to initially apply at a start of the brake event, and selecting a cooler brake of the brakes to subsequently apply when the warmer brake is released during the brake event. The method further comprises applying the warmer brake and the cooler brake in the determined sequence during the brake event. In another example, an aircraft brake system comprises brakes and a controller that is programmed to, during taxiing, apply a warmer subset of the brakes before applying a cooler subset of the brakes during a brake event.