The motor servo drive system was used to control antenna turning, adjust the antenna to point at satellite again and receive signal.

再用电机伺服驱动系统控制天线转动，调整其重新指向卫星接收信号。

youdao

Professor Reppert says scientists thought they understood the control system in the monarchs until they took a closer look at the insects' antenna.

VOA: special.2010.04.27

Gusev was arrested, a remote-control antenna was found hidden in his car.

CENTERFORSECURITYPOLICY: Security Meltdown at State Department Start at the Top

Gogo also recently announced that it will partner with AeroSat to deliver the satellite antenna, radome, antenna control and modem unit and high power transceiver to Gogo.

ENGADGET: Gogo spreads its in-flight WiFi wings further with SES satellite deal

Whether the component is a motor, a control valve, a star tracker, an antenna or a chip, it is simpler to look for non-American alternatives.

ECONOMIST: Space technology