IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0512618
(1990-04-11)
|
|
발명자
/ 주소 |
- Chakravarty Abhijit J. M. (Renton WA)
|
| 출원인 / 주소 |
- The Boeing Company (Seattle WA 02)
|
| 인용정보 |
피인용 횟수 :
40 인용 특허 :
0 |
초록
▼
An onboard flight management system produces cost-effective trajectory target signals in response to an input desired time of arrival. Aircraft monitoring systems produce signals corresponding to real-time aircraft parameters including fuel flow rate, airspeed, windspeed, thrust, drag and mass. Stor
An onboard flight management system produces cost-effective trajectory target signals in response to an input desired time of arrival. Aircraft monitoring systems produce signals corresponding to real-time aircraft parameters including fuel flow rate, airspeed, windspeed, thrust, drag and mass. Stored in memory are aircraft characteristics including time cost, fuel cost, and acceleration due to gravity. A flight computer responds to an input desired time-of-arrival and the real-time parameters and stored characteristics signals and produces cost-effective trajectory target signals. The computer employs multiply regressed drag and fuel flow models which avoid trajectory discontinuities and the trajectory targets are produced using a Fibonacci search technique, which is computationally very efficient.
대표청구항
▼
A method for producing optimal aircraft time-responsive trajectory target signals comprising the steps of: a) producing signals representative of selected predetermined real time aircraft parameters including fuel flow rate, f, airspeed, V, windspeed, VW, thrust, T, drag, D, and aircraft mass; b) pr
A method for producing optimal aircraft time-responsive trajectory target signals comprising the steps of: a) producing signals representative of selected predetermined real time aircraft parameters including fuel flow rate, f, airspeed, V, windspeed, VW, thrust, T, drag, D, and aircraft mass; b) producing signals representative of predetermined aircraft performance characteristics including aircraft time cost, Ct, fuel cost, Cf, and acceleration due to gravity, g; c) producing signals representative of an input desired aircraft arrival time and place of arrival; d) providing processing means for predeterminedly processing said signals produced in step a), b) and c) and producing aircraft thrust and airspeed target values to minimize the value of the expression [Figure] [Figure] where lx, lm and lE are predeterminedly calculated signal values corresponding to the range, mass and energy adjoint variables, respectively, such signals representing target aircraft trajectory and speed signals corresponding to an optimum cost effectiveness flight trajectory for arriving at said desired place and said desired arrival time; and e) providing aircraft steering means responsive to said target signals to produce said optimum trajectory.
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