Nutation and roll error angle correction means

Details Nutation and roll error angle correction means Nutation and roll error angle correction means

1974-01-25

1976-02-10

Pendegrass, Verlin R.

Aeronautics and astronautics

Missile stabilization or trajectory control

Automatic guidance

244169, B64C 1500

Patent

active

039374238

ABSTRACT:
A system for controlling the attitude of a vehicle along three-axes is provided with a simple momentum wheel of one degree of freedom and several jets so as to enable correction of attitude error and dampen nutation action of the vehicle. The jets are controlled by means of a two channel control circuit terminating in logic gates that select the particular jet required to make the error correction. One of the channels is responsive to the polarity or sign of a voltage provided as input thereto whereas the other channel is responsive to threshold voltage levels provided to it, both channels being responsive to inputs from a low pass filter. The threshold voltage levels are adjusted by feedback correction paths provided in that particular portion of the control circuit.

REFERENCES:
patent: 3189299 (1965-06-01), Garner et al.
patent: 3365147 (1968-01-01), Wolfe
patent: 3511452 (1970-05-01), Smith et al.
patent: 3624367 (1971-11-01), Hamilton et al.
patent: 3643897 (1972-02-01), Johnson
patent: 3813067 (1974-05-01), Mork

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