| 摘要 |
A stabilization aid for a vehicle- or vessel-borne search unit comprises two servomechanisms for stabilizing the observation part (3) of the search unit about two mutually perpendicular axes (S1 and S2) mounted on the part of the search unit which rotates about the search axis (1). The stabilization aid comprises a computer (7) for determining, from the instantaneous angle of inclination ( alpha ) of the platform (2) supporting the search unit with respect to an earth-fixed reference axis and the instantaneous angular position (B) of the search unit about the search axis (1), measured in the plane of the platform (2), input signals for the servomechanisms. A portion of these input signals are compensating signals for the control errors in the servomechanisms. The principal causes of the control errors are the disturbing torques arising through the non-uniformity in the search motion and the rotational velocity of each of the stators with respect to the rotors of the servomechanism motors on their axes. |
