Patent ID: 9340300
Filing Date: 2016-05-17
CPC Classification: B64C,B64D,G01C,G05D,G08G

Claim Text:
1. An onboard braking alerting system for an aircraft, the system comprising an alert device operatively coupled to a computer system, wherein said computer system is programmed to perform operations comprising: (a) obtaining data representing a position of an end of a runway; (b) determining a current position, a current groundspeed and a final groundspeed of an aircraft on the runway, and a maximum manual deceleration rate of the aircraft; (c) calculating a remaining runway distance from the current position of the aircraft to the end of the runway; (d) calculating a maximum manual deceleration distance that the aircraft would travel during maximum manual braking to the final groundspeed based on the current groundspeed and the maximum manual deceleration rate of the aircraft; (e) determining whether the maximum manual deceleration distance calculated in operation (d) is greater than the remaining runway distance calculated in operation (c) or not; (f) repeating operations (b) through (f) in response to a determination in operation (e) that the maximum manual deceleration distance is not greater than the remaining runway distance or proceeding to operation (g) in response to a determination in operation (e) that the maximum manual deceleration distance is greater than the remaining runway distance; and (g) issuing an alert activation signal, wherein said alert device is configured to produce an alert in response to issuance of said alert activation signal by said computer system, and wherein said computer system is programmed to perform additional operations if the maximum manual deceleration distance is less than the remaining runway distance, said additional operations comprising: (h) calculating a maximum manual deceleration time based on the current and final groundspeed and the maximum manual deceleration rate; (i) calculating a distance that the aircraft would travel during a time period equal to the sum of the maximum manual deceleration time and a specified time interval based on the current groundspeed and the maximum manual deceleration rate of the aircraft; (j) comparing the distance calculated in operation (i) to the remaining runway distance; and (k) issuing an alert activation signal if the distance calculated in operation (i) is greater than the remaining runway distance.