|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 4 인용 특허 : 5|
A velocity change (ΔV) thruster is operated on a spacecraft, which unavoidably causes attitude error. A reaction wheel (RWA) corrects the attitude. At the beginning of the thruster maneuver, the total attitude control momentum required to at least correct for the ΔV thruster attitude errors over the duration of the entire maneuver is determined, and the RWA momentum may also be determined. Attitude control thrusters (REAs) are operated. The REAs are operated to correct at least the net ΔV thruster induced attitude error, and preferably also to reset the ...
1. A spacecraft, comprising:at least one ΔV thruster for producing thrust in a particular direction, the thrust of said at least one ΔV thruster being subject to thrust errors which tend to cause disturbance torques: at least one reaction wheel for counteracting said disturbance torques; at least one control thruster for torquing said spacecraft for thereby imparting momentum to said spacecraft; and control means coupled to said at least one control thruster and to said at least one reaction wheel, for (a) during a velocity change maneuver, predicting th...