Spacecraft guidance and control system

Details Spacecraft guidance and control system Spacecraft guidance and control system

1989-06-26

1991-02-12

Casaregola, Louis J.

Power plants

Reaction motor

Method of operation

60228, 60233, F02K 980

Patent

active

049913930

ABSTRACT:
Apparatus and a corresponding method for controlling the attitude of a space vehicle during operation of its propulsion engines, without gimbaling of the engines. Two engines are differentially throttled, one above and one below a nominal thrust setting of the engines, in response to an error signal indicative of the difference between an actual attitude angle and a desired attitude angle. Three or four engines can be used to control attitude about two orthogonal axes, or a greater number of engines can be used for redundancy.

REFERENCES:
patent: 3097483 (1963-07-01), Bixon et al.
patent: 3120359 (1964-02-01), Sprecher
patent: 3231223 (1966-01-01), Upper
patent: 3251184 (1966-05-01), Sbaraglia et al.
patent: 3311130 (1967-03-01), Caldwell
patent: 3722219 (1973-03-01), Spencer
patent: 4787201 (1988-11-01), Snow

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