Helicopter turn coordination and heading hold mode control

Details Helicopter turn coordination and heading hold mode control Helicopter turn coordination and heading hold mode control

1992-06-01

1994-04-05

Bartuska, F. J.

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

244195, 364433, 364434, B64C 1134, G05D 104

Patent

active

052997596

ABSTRACT:
A mode control (25) controls a helicopter flight control system (21) between a heading hold mode and a turn coordination mode according to switching patterns resembling the natural response of an expert pilot to flight conditions. Helicopter operating parameters (31,30) are detected (31,29) and each parameter's detected value is converted from a crisp value to a fuzzy input (100). A new mode fuzzy output is provided by applying a compositional rule of inference (105) across each fuzzy input and a composite mode selection rule base (110). The new mode fuzzy output is converted into a crisp value (112) which is used to determine whether the flight control system operates in the heading hold mode or the turn coordination mode.

REFERENCES:
patent: 4003532 (1977-01-01), Adams et al.
patent: 4029271 (1977-06-01), Murphy et al.
patent: 4067517 (1978-01-01), Barnum
patent: 4206891 (1980-06-01), Perez et al.
patent: 4300200 (1981-11-01), Doe
patent: 4484283 (1984-11-01), Verzella et al.
patent: 4645141 (1987-02-01), McElreath
patent: 5099429 (1992-03-01), Onari et al.
patent: 5129475 (1992-07-01), Kawano et al.
patent: 5195039 (1993-03-01), Gold et al.

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