|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||244/164 ; 244/165 ; 244/166|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 7 인용 특허 : 4|
Attitude-control methods are provided which eliminate or reduce structural resonances in spacecraft that are excited by momentum wheel imperfections. The methods are preferably practiced with an over-determined attitude-control system which is typically available because spacecraft often carry backup momentum wheels to insure against failure of primary momentum wheels. In a method embodiment, a set of angular-velocity waveforms is selected that substantially realizes a commanded momentum vector when applied to a corresponding set of momentum wheels where...
[ We claim:] [6.] A method of controlling the attitude of a spacecraft which has a resonance at a resonant frequency, said method comprising the steps of:providing an over-determined torquing system of attitude-control structures which include momentum wheels that each rotate in accordance with a selectable, respective angular-velocity waveform;selecting a selected set from all sets of angular-velocity waveforms that substantially realize a commanded momentum vector in said spacecraft when applied to a corresponding set of said momentum wheels wherein al...