国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

China / Innovation

Mars probe makes its debut landing at Shanghai fair

By Luo Wangshu (chinadaily.com.cn) Updated: 2015-11-03 12:55

MANNED OR UNMANNED?

China has yet to start a manned deep-space exploration program, and experts hotly debate whether it's necessary to send humans into deep space, or just let robots do the job.

Guo Linli, a researcher with the China Academy of Space Technology (CAST), said humans will inevitably go deeper into space from near Earth orbit to the moon and then to Mars.

"Can robots replace humans to explore deep space? My view is that robots are suitable for repetitive, heavy loading, and fixed and known work. But it needs human wisdom to decide on unknown work that cannot be simulated in lab, such as surveying and choosing a site for a future lunar base," Guo said.

However, such ambitions come with a cost, and the biggest would be for the greatly increased scale of the spacecraft and rockets. It would need a heavy-lift launch vehicle with a capacity of more than 100 tonnes to send four astronauts to the moon, and environmental control and life support systems would be essential too, Guo said.

Compared with unmanned deep space exploration, manned missions would have fewer possible destinations and the cost and difficulties would be much greater. Currently, only the moon, Mars and asteroids are considered, Guo said.

Humans and robots will each have advantages, and will work together in exploring the deep space far into the future.

ASTEROID "ANTS"

In recent years, asteroids have become a focus of international space exploration. Scientists say asteroids hold materials that could unlock the secrets of the birth of the solar system and the origin of life.

Chinese experts are discussing the feasibility of sending a landing probe and retrieve samples from an asteroid.

But how could a probe land and move on an asteroid that might have an odd shape, almost zero gravity and complicated environment?

Zhang Wangjun, a senior CAST engineer, said wheeled robots like the U.S. Mars rover Curiosity have played an important role in space exploration. But robots with feet are more suitable for moving on hilly terrain with many obstacles.

"Robots with feet can avoid and cross obstacles more easily. We are researching two-feet, four-feet and six-feet robots. It seems that a six-feet robot has more advantages in mobility and flexibility in the complicated environment," Zhang said.

This finding echoes those in the United States, Europe and Japan, where researchers have developed robots imitating cockroaches, spiders and ants.

However, he said, current research only meets the industrial requirements. It is still a long way to go to adapting a robot to the environment of an asteroid.

Zhang has devised asteroid-probing robots like a pair of "ants" that can work independently or cooperatively.

 

Previous Page 1 2 Next Page

Highlights
Hot Topics
...
电白县| 房产| 堆龙德庆县| 湾仔区| 博乐市| 田东县| 淮北市| 三河市| 武隆县| 桐乡市| 千阳县| 渑池县| 辛集市| 雅安市| 岳西县| 澄城县| 遂昌县| 蒲城县| 苍南县| 泸水县| 漳州市| 绥德县| 安吉县| 东乡族自治县| 尖扎县| 金乡县| 宜兰县| 龙州县| 唐山市| 会昌县| 富源县| 临西县| 黄山市| 苍梧县| 天水市| 通化县| 南昌市| 三亚市| 当雄县| 西盟| 大洼县|