| 摘要 |
<p>A feedback control system has a remote control 11 and a model machine 21 controlled by the remote control 11. The remote control 11 has a power switch 13 electrically connected with a first transceiver 14. The first transceiver 14 can control the power state of the remote control 11. When the power switch 13 is turned on, the first transceiver 14 sends a sensing signal. The model machine 21 has a second transceiver 22 for receiving the sensing signal transmitted from the first transceiver 14. After the second transceiver 22 receives the sensing signal, it determines whether the model machine 21 is power off. Afterwards, a power signal is sent back to the first transceiver 14 to determine the power state of the remote control 11.</p> |
