| 摘要 |
A system is coupled to a pointing mirror (12) for stabilizing it and its line-of-sight (13) from three-dimensional rotational disturbances ( omega i, omega j, omega k) exerted thereon. First and second two-degree-of-freedom dynamically tuned gyroscopes (26, 28) are secured to the mirror and placed respectively on its elevation and azimuth axes (22, 24). The first gyroscope (26) is coupled to electronic apparatus (30) to provide inertial rates ( omega 4*, omega 2*) of the mirror respectively about an axis (13) angled from a line (17) normal thereto and about the elevation axis. The second gyroscope (28) is coupled to the electronic apparatus to provide inertial rates ( omega 2, omega 3) of the mirror respectively about its pitch and yaw axes. Inertial rates ( omega e, omega d) of angular motion of the mirror respectively about its line-of-sight pitch and yaw axes (e, d) are calculated from the inertial rate ( omega 4*, omega 2*, omega 2, omega 3), and summed to zero so that torques (23, 25) stabilize the mirror and its line-of-sight about its elevation and azimuth axes. |
