Self adaptive limiter for automatic control of approach and land

Details Self adaptive limiter for automatic control of approach and land Self adaptive limiter for automatic control of approach and land

1994-10-19

1998-10-27

Kashnikow, Andres

Aeronautics and astronautics

Aircraft control

Automatic

244181, 244185, 244186, 244195, G05D 106

Patent

active

058268340

ABSTRACT:
A self adaptive limiter for use in aircraft control systems during approach and landing is disclosed. Estimated flight path angle is continuously computed during the glidepath tracking phase until a predetermined lock altitude above ground when a nominal flight path angle is latched. Nominal vertical speed is continuously computed below the lock altitude as a function of the latched nominal flight path angle and ground speed of the aircraft. A vertical speed limit function is generated as a function of the nominal vertical speed and radio altitude. During approach and landing a pitch limit is computed from the vertical speed limit, vertical speed, ground speed, and pitch. When a pitch command to the autopilot exceeds the pitch limit(i.e. commands excessive pitch down attitude), it is limited to the pitch limit thus preventing the aircraft from descending below a safe altitude. The invention is self-adaptive since the pitch limit varies in response to changes in the ground speed of the aircraft, wind, and ILS beam angles.

REFERENCES:
patent: 3519806 (1970-07-01), Lami et al.
patent: 3698669 (1972-10-01), Miller
patent: 3887148 (1975-06-01), Devlin
patent: 3930610 (1976-01-01), Hache
patent: 4043526 (1977-08-01), Donley et al.
patent: 4236685 (1980-12-01), Kissel
patent: 4485446 (1984-11-01), Sassi
patent: 4609987 (1986-09-01), Greene
patent: 4714929 (1987-12-01), Davidson
patent: 4947165 (1990-08-01), Zweifel
patent: 5224664 (1993-07-01), Adams, Sr. et al.
patent: 5361065 (1994-11-01), Johnson et al.
patent: 5377937 (1995-01-01), LaMay et al.

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