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System and method to modify an aircraft flight trajectory

專利號
US10867520B2
公開日期
2020-12-15
申請人
THE BOEING COMPANY（US IL Chicago）
發(fā)明人
Christopher J. Heiberg; Thomas E. Yochum
IPC分類
G08G5/00; B64C13/18; B64C13/16
技術(shù)領(lǐng)域
flight,waypoint,trajectory,profile,turn,aircraft,wpt2,initial,wpt1,waypoints
地域： IL IL Chicago

摘要

A method includes generating a flight plan of an aircraft. The flight plan is based on at least one waypoint and a set of operational rules associated with the aircraft. The method also includes generating an initial trajectory profile based on the at least one waypoint and the set of operational rules. The method further includes identifying an impermissible flight condition associated with the initial trajectory profile. The impermissible flight condition violates at least one operational rule of the set of operational rules. The method further includes generating a modified trajectory profile by modifying at least one aspect of the initial trajectory profile to remove the impermissible flight condition. The modified trajectory profile can be used by a pilot to fly the aircraft, the modified trajectory profile can be used by an autopilot system, or the modified trajectory profile can be displayed.

說明書

FIG. 7 is a diagram that is indicative of a process 700 to determine whether an impermissible flight condition is present. The process 700 can be performed using a rule-based decision engine, such as flight management system 202, to detect if an impermissible flight condition is present. If an impermissible flight condition is present, one or more corrective algorithms can be performed by the flight management system 202 to generate a smooth and continuous flight trajectory profile (e.g., the modified trajectory profile 242).

According to the process 700, the flight management system 202 can determine a course from the turn center of the end of a first turn (FTP1) and the angle to the AF/RF waypoint (e.g., the waypoint 236E). If the end of the first turn (FTP1) is past the waypoint 236E on the arc, then an impermissible flight condition is present. In order to determine whether the end of the first turn (FTP1) is past the waypoint 236E, the flight management system 202 can compare the cosine of the angle between the course from distance measuring equipment (DME) to the end of the first turn (FTP1) and the angle between the DME to the outbound course. An impermissible flight condition is present if the cosines are opposite signs.

According to another implementation of the process 700, the flight management system 202 can determine the course change between the AF/RF turn center to TC1 and the AF/RF turn center to the waypoint 234E. An impermissible flight condition is present if the course change is smaller than the AF/RF turn center to TC1 and AF/RF turn center to the end of the first turn (FTP1).

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