Cruise airspeed control of aircraft altitude capture

Details Cruise airspeed control of aircraft altitude capture Cruise airspeed control of aircraft altitude capture

1984-01-24

1986-05-20

Blix, Trygve M.

Aeronautics and astronautics

Aircraft control

Automatic

244182, 244188, 60906, G05D 108

Patent

active

045896160

ABSTRACT:
An aircraft speed control system for use with an automatic throttle position control system and automatic flight control system permits capturing and maintaining a commanded airspeed during the capturing of a desired altitude from either climbing or descending flight. The system manipulates the throttles at a variable rate dependent on the difference between the actual thrust of the aircraft and the desired cruising thrust at the selected airspeed and inversely proportional to the actual altitude rate. A signal derived from thrust error and altitude rate signals is utilized to generate a limiter control signal which is combined with an engine pressure ratio signal to generate a drive signal for urging the aircraft to capture precisely the commanded airspeed.

REFERENCES:
patent: 2664254 (1953-12-01), Hendrickson
patent: 3240446 (1966-03-01), Miller
patent: 3591110 (1971-07-01), Dramer
patent: 3638092 (1972-01-01), Kammerer
patent: 3813063 (1974-05-01), Martin
patent: 4114842 (1978-09-01), Hofferber et al.
patent: 4205814 (1980-06-01), Larson et al.
patent: 4277041 (1981-07-01), Marrs et al.

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