IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0101215
(1993-08-03)
|
|
발명자
/ 주소 |
- Gonser John M. (Albuquerque NM) Kominek Richard J. (Albuquerque NM)
|
| 출원인 / 주소 |
- Honeywell Inc. (Minneapolis MN 02)
|
| 인용정보 |
피인용 횟수 :
40 인용 특허 :
0 |
초록
▼
A Flight Management System for aircraft whereby time-constrained flight can be achieved while maintaining predetermined input parameters selected for minimizing cost of flight, wherein arbitrary points in the flight plan can be designated as time-constraint points, and wherein flight segments can be
A Flight Management System for aircraft whereby time-constrained flight can be achieved while maintaining predetermined input parameters selected for minimizing cost of flight, wherein arbitrary points in the flight plan can be designated as time-constraint points, and wherein flight segments can be arbitrarily selected for exclusion from any speed variation. A speed generator derives an initial speed schedule for each segment of a flight plan from inputs of a predetermined cost index, the flight plan, and aircraft performance parameters. The speed schedule is modified by wind data, constant speed segments, and predetermined speed limits. When applied to a profile generator an estimated time of arrival is computed, as well as predicted distance and velocity values for each segment of flight. The predicted values are used to compute a total time of arrival. When compared with a given arrival constraint time and the estimated time of arrival, a speed correction factor is derived which, when fed back to the profile generator, results in adjusting the estimated time of arrival to coincidence with the arrival constraint time. TABLE 1 ________________________________ -Original Flight Plan for TNAV Test SEGDIST SEGSPD ETA RTA NAUT. MI. KNOTS CSS HHMM.M HHMM.M ________________________________ 10.0 230.0 0002.6 10.0 245.0 0005.1 35.0 270.0 CSS 0012.8 100.0 280.0 0034.3 20.0 290.0 CSS 0038.4 70.0 300.0 CSS 0052.4 400.0 300.0 0212.4 200.0 310.0 0251.1 200.0 280.0 0334.0 100.0 275.0 0355.8 35.0 275.0 0403.4 100.0 280.0 0424.9 20.0 290.0 0429.0 70.0 300.0 0443.0 400.0 300.0 0603.0 0528.0 200.0 310.0 0641.7 200.0 240.0 0731.7 100.0 240.0 0756.7 50.0 235.0 0809.5 ________________________________ SEGDIST =Distance of the flight plan segment (leg) -SEGSPD =Speed to be used in the flight plan segment -CSS =Constant Speed Segment -RTA HOURS =Requested time of arrival, in hours elapsed since start of flight - TABLE 2 ________________________________ -TNAV Modified Flight Plan for TNAV Test SEGDIST SEGSPD ETA RTA NAUT. MI. KNOTS CSS HHMM.M HHMM.M ________________________________ 10.0 250.0 0002.4 10.0 250.0 0004.8 35.0 270.0 CSS 0012.6 100.0 314.3 0031.7 20.0 290.0 CSS 0035.8 70.0 300.0 CSS 0049.8 400.0 334.3 0201.6 200.0 344.3 0236.5 200.0 314.3 0314.7 100.0 309.3 0334.1 35.0 309.3 0340.8 100.0 314.3 0359.9 20.0 324.3 0403.6 70.0 334.3 0416.2 400.0 334.3 0528.0 0528.0 200.0 310.0 0606.7 200.0 240.0 0656.7 100.0 240.0 0721.7 50.0 235.0 0734.5 ________________________________ SEGDIST =Distance of the flight plan segment (leg) -SEGSPD =Speed to be used in the flight plan segment -CSS =Constant Speed Segment -RTA HOURS =Requested time of arrival, in hours elapsed since start of flight -
대표청구항
▼
A method for time-constrained navigation of an aircraft, comprising the steps of: storing in a data base a flight plan defining at least one flight segment having a time-constrained origin and a time-constrained destination point, a plurality of time-constrained segments comprising a sub-path, stori
A method for time-constrained navigation of an aircraft, comprising the steps of: storing in a data base a flight plan defining at least one flight segment having a time-constrained origin and a time-constrained destination point, a plurality of time-constrained segments comprising a sub-path, storing in said data base a predetermined cost index representative of at least fuel costs and crew labor costs, storing in said data base a family of performance data representative of a given aircraft, applying said stored flight plan, said stored cost index, and said stored performance data to a speed generator for deriving, storing, and providing an initial speed schedule for each segment of said flight plan, providing a second data base of wind velocities corresponding to said flight plan, defining predetermined ones of said segments wherein a constant speed must be maintained and providing signals corresponding thereto, sequentially applying said speed schedule for each of said segments, said wind velocity schedule, and said constant speed signal to a speed adjuster for storing and providing a modified speed schedule in accordance therewith, applying said modified speed schedule to a speed limiter having stored therein the magnitudes of allowable speed limits for imposing maximum and minimum speed limits thereon to provide a limited speed schedule, said limited speeds representative of unsafe or unattainable speeds with said given aircraft, applying said limited speed schedule to a profile generator for executing a simulation of the flight path through each leg of the flight plan and for predicting required speeds and altitudes and for sequentially providing corresponding distance and velocity for each segment in accordance with said flight plan, and for further providing an estimated time of arrival, computing a plurality of time durations corresponding to a function of said predicted segment distance and velocity, applying said computed time durations to a summer for computing a summation of said time durations, excluding constant speed segments from said summation to provide a total time of arrival, comparing said estimated time of arrival with a predetermined constraint time and providing a difference thereof, applying said difference and said summation to derive a ratio corresponding to a speed error correction, applying said speed error correction to said speed adjuster for urging said estimated time of arrival to coincidence with said predetermined constraint time, and applying said predicted required speeds to control the airspeed of said aircraft, whereby a given arrival time is achieved for each sub-path.
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