| 摘要 |
PURPOSE:To stabilize a platform fully by suppressing its unstableness easily and securely by removing the undesired torque of a gyroscope due to the axial rotation of the azimuth of the platform. CONSTITUTION:An antenna 21 is enabled to be driven in an EL (elevation angle) direction by an EL driving mechanism 22, which is mounted on a platform 23. This platform 23 is driven in an azimuth direction by an Az (azimuth angle) driving mechanism 24 to receive a signal from a satellite. A gimbal structure 25 of said constitution is composed of inner and outer gimbals 251 and 252, and gimbal axes 253 and 254 are provided at right angles to the gimbals 251 and 252; and the center of gravity of the platform 23 is set low by the axes 253 and 254, and gyroscopes 281 and 282 are provided around axes of rotation 271 and 272 crossing to each other at right angles. Then, the gyroscopes 281 and 282 are isolated from the azimuth-axial rotation of the platform 23 to remove the undesired torque of the gyroscopes 281 and 282. |
