Back-up fly by wire control system

Details Back-up fly by wire control system Back-up fly by wire control system

1989-04-17

1991-04-30

Lall, Parshotam S.

Boots, shoes, and leggings

244 1713, 244196, 73178H, 73178R, B64C 1316

Patent

active

050124234

ABSTRACT:
A device and method of back-up fly by wire control, especially useful in fly by wire systems when a failure mode is encountered. The problem of back-up system controllability with the type of compliant sidestick which has minimal displacement and returns to zero upon release of the control force is solved by reducing the authority of the sidestick to a fraction of full authority actuator position capability, to provide good control sensitivity. Full authority actuator position control is provided by automatically activating a trim integrator when the sidestick reaches its displacement stops.

REFERENCES:
patent: 4236685 (1980-12-01), Kissel
patent: 4527242 (1985-07-01), McElreath et al.
patent: 4676460 (1987-06-01), Hagy et al.
patent: 4740899 (1988-04-01), McElreath
patent: 4741501 (1988-05-01), Clelford et al.
patent: 4758958 (1988-07-01), von Gersdorff

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