now getting airborne (升空).
This week the successful
flight of what are probably
the smallest hovering robots yet was reported in Science by Robert Wood and his colleagues at the Wyss Institute for Biologically Inspired Engineering at Harvard. These robots are the size of crane flies.
Wingtip to wingtip they measure 3cm and they weigh just 80
milligrams.
Like true flies,
and unlike dragonflies or butterflies, they have but a single pair of wings.
Dr. Wood, as he is quick to point out, is not trying to build a military drone. Rather, it is the basic science behind flying insects that he and his team are interested in.
No doubt the armed forces are taking a keen interest in this sort of work. But civilian applications such as search and rescue, he thinks, are likely to be as important as military and security ones. Indeed, the idea that inspired the study was that of using swarms of robotic flies to pollinate (授粉) crops.
]Flies, as anyone who has tried to hit one knows, are the most intelligent of flying creatures. Dr.Wood and his colleagues considered it impossible, even with the best miniaturised (使小型化) mechanical and electrical parts currently available, to build an artificial version of one that would show anything like that level of aerial prowess (空中实力). They therefore had to come up with a new form of manufacturing, which they call smart composite microstructures (SCM), to do the job.
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