Device and process for determining a runway state, aircraft including such a device and piloting assistance system using said runway state
First Claim
1. A method for determining a state of a runway including the following steps:
- acquiring, using at least one measurement system, measurement data relating to at least one physical parameter of an aircraft, during an aircraft roll during takeoff or landing on the runway;
obtaining, using the acquired data, a plurality of estimated adhesion values (μ
) of the runway, corresponding to moments during the aircraft roll;
obtaining, using the acquired data, a slip ratio value(s) of at least one aircraft wheel for each of the moments during the aircraft roll, wherein the at least one wheel includes at least one tire;
computing coupled data points comprising the adhesion values (μ
) and the slip ratio values (s) for each of the moments during the aircraft roll;
determining a runway state by comparing the coupled data points with predetermined profiles, and selecting one of the predetermined profiles which corresponds to the coupled data points, wherein the selected predetermined profile indicates the runway state;
displaying, on a display in a cockpit of the aircraft for pilot validation, the determined state of the runway; and
communicating, via a communication device, the state of the runway outside of the aircraft to at least one of an airport ground station and one or more other aircraft for use by the one or more other aircraft for control when taking off or landing on the runway; and
wherein the determination of the runway state by comparison includes calculating slope values (k) representative of the coupled data points for a plurality of adhesion (p) values; and
selecting from among a set of zones of slope values (k) and corresponding adhesion values (p), wherein each zone is associated with a different runway state, and the selected predetermined profile corresponds to the zone including the calculated slope values (k) for the plurality of adhesion (p) values.
1 Assignment
0 Petitions
Accused Products
Abstract
This invention relates to a device and process for determining an airport runway state (12), as well as for using such data. The process includes: acquisition (A1) of measurement data pertaining to at least one physical size of an aircraft (10), during the take off or landing roll phase of the aircraft on said runway; obtaining (A2), using the data acquired, a plurality of estimated adhesion values “μ” of the runway, corresponding to a respective plurality of taxiing moments of the aircraft; obtaining (A3), using the data acquired, a slip ratio value “s” of at least one of the aircraft'"'"'s wheels for each said taxiing moment, so as to obtain (A4) a plurality of coupled data points [s,μ]; and determination of a runway state by comparing (A5.2) the coupled data points [s,μ] profile with at least one predetermined profile.
14 Citations
22 Claims
-
1. A method for determining a state of a runway including the following steps:
-
acquiring, using at least one measurement system, measurement data relating to at least one physical parameter of an aircraft, during an aircraft roll during takeoff or landing on the runway; obtaining, using the acquired data, a plurality of estimated adhesion values (μ
) of the runway, corresponding to moments during the aircraft roll;obtaining, using the acquired data, a slip ratio value(s) of at least one aircraft wheel for each of the moments during the aircraft roll, wherein the at least one wheel includes at least one tire; computing coupled data points comprising the adhesion values (μ
) and the slip ratio values (s) for each of the moments during the aircraft roll;determining a runway state by comparing the coupled data points with predetermined profiles, and selecting one of the predetermined profiles which corresponds to the coupled data points, wherein the selected predetermined profile indicates the runway state; displaying, on a display in a cockpit of the aircraft for pilot validation, the determined state of the runway; and communicating, via a communication device, the state of the runway outside of the aircraft to at least one of an airport ground station and one or more other aircraft for use by the one or more other aircraft for control when taking off or landing on the runway; and wherein the determination of the runway state by comparison includes calculating slope values (k) representative of the coupled data points for a plurality of adhesion (p) values; and
selecting from among a set of zones of slope values (k) and corresponding adhesion values (p), wherein each zone is associated with a different runway state, and the selected predetermined profile corresponds to the zone including the calculated slope values (k) for the plurality of adhesion (p) values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An apparatus for determining a state of a landing runway, including:
-
at least one measurement system that acquires measurement data pertaining to at least one physical parameter of an aircraft, the measurement data corresponding to a plurality of moments during an aircraft roll on takeoff or landing of the aircraft on the runway; a calculator that obtains, using the acquired data, a plurality of estimated adhesion values (μ
) of the runway for each of the moments of the aircraft roll;a calculator that obtains, using the acquired data, a slip ratio value (s) of at least one aircraft wheel, the wheel including a tire, for each of the moments of roll, and that calculates from (s) and (μ
) a plurality of coupled data points;a determination module configured to determine the state of the runway by comparing the coupled data points to at least one predetermined profile; and a communication device that communicates the state of the runway outside of the aircraft to at least one of an airport ground station and one or more other aircraft for use by the one or more other aircraft for control when taking off or landing on the runway; and wherein the determination module is configured to obtain a plurality of slope values (k) of the coupled data points profile for a plurality of adhesion (μ
) values; and
to determine, from among a set of zones of slope values (k) and corresponding adhesion (μ
) values the one zone of the set of zones which includes a slope value (k) and corresponding adhesion (μ
) values representative of the calculated coupled data points, wherein each set is associated with a different runway state. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A method to determine a state of a runway comprising:
-
acquiring, using at least one measurement system, measurement data representative of a physical parameter of an aircraft for a series of moments during an aircraft roll phase on the runway; calculating an adhesion (μ
) value of at least one of the wheels of the aircraft to the runway at each of the series of moments, wherein the calculation uses the measured data;calculating a slip ratio value (s) representing slippage between the at least one of the wheels and the runway at each of the series of moments, wherein the calculation uses the measured data; calculating a coupled data point for each of the series of moments, wherein each coupled data point includes the adhesion (μ
) value and the slip ratio (s) value for the corresponding moment;determining a slope value (k) for a group of the coupled data points, wherein the group consists of coupled data points having a slip ratio value (s) no greater than a slip ratio value (s) for the coupled data point having a maximum adhesion (μ
) value;selecting a runway state profile from a group of runway state profiles based on the determined slope value (k), determining the runway state based on the selected runway state profile displaying, on a display in a cockpit of the aircraft for pilot validation, the determined state of the runway; and communicating, via a communication device, the state of the runway outside of the aircraft to at least one of an airport ground station and one or more other aircraft for use by the one or more other aircraft for control when taking off or landing on the runway. - View Dependent Claims (19, 20, 21, 22)
-
Specification