| 摘要 |
A momentum actuator (106) for steering a spacecraft is disclosed. The momentum actuator (106) comprises a rotor (110) , a gimbal (113) upon which the rotor is mounted, and a stepper motor (112) coupled to the gimbal (113) and operable to rotate the rotor (110) about the gimbal (113) in a series of steps. In one embodiment of the present invention the spin rate of the rotor (110) can be varied to provide additional torque . |
