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中国火星探测器气动设计已完成 正在试验验证
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Topic: 中国火星探测器气动设计已完成 正在试验验证 (Read 79 times)
snowlei52189
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中国火星探测器气动设计已完成 正在试验验证
March 11, 2018, 03:05:37 PM
#1
科技日报北京3月10日电 (记者付毅飞)全国政协委员、中国航天科技集团十一院研究员周伟江10日向科技日报记者透露,我国计划于2020年发射的火星探测器,已完成气动外形设计,以及气动力、气动热设计工作。
据了解,我国火星探测任务力争一次实现环绕、着陆和巡视三大目标。其中,着陆器的着陆过程涉及到多项空气动力学难题。
周伟江介绍,着陆器降落过程初期速度很快,为避免空气摩擦产生的温度过高将其烧毁,需要有一定升力帮助它减速。此类轴对称结构的航天器,要产生升力必须让它不对称,这有几种方法。国内外一些探测器采取的是调整重心的策略,我国火星着陆器则是通过开启活动控制部件、配合喷流控制来产生升力。
同时,控制着陆器的姿态非常重要,如果它翻起跟头,可能被烧蚀或偏离轨道。
周伟江说,着陆器下降过程中,会不断有部件分离。比如先要抛出前盖,打开降落伞,这个过程不能影响飞行器的稳定性。降到一定高度时,要抛掉大底,由于此时着陆器是大底朝前降落,这个动作相当于是迎风完成。接下来,还要把仓里的巡视器抛出去。如此一来,变成几个部件一起降落,如果相互干扰碰撞,会对任务造成很大影响。这些问题都要在气动设计中考虑周全。
此外他介绍,我国火星探测器质量较小,在进行气动力、气动热及相关操作系统设计时,处处受到严格的重量限制。“比如防热材料,如果用少了,着陆器会被烧坏;多用一点,重量就会超标。”他说,“各系统、结构要精打细算,一点点抠,几乎不容许有余量。”
不过周伟江表示,火星探测器各项气动设计工作已全部完成,正在进行试验验证。
eyfdfh
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Re: 中国火星探测器气动设计已完成 正在试验验证
March 11, 2018, 06:45:03 PM
#2
我国的科学技术日益强大,日臻完善,很多技术领先世界。东方的巨龙已腾飞,强国地位得到巩固,大国风范日渐显现,航天梦又有惊人的飞跃。了不起我的大中国,祝福你越来越强大,向广大的科技工作者致敬。
Vshen
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Re: 中国火星探测器气动设计已完成 正在试验验证
March 12, 2018, 05:05:18 AM
#3
Quote from: drinkyj on March 11, 2018, 04:25:00 PM
中国的航天科技虽然跟美国还是有不小的差距,但请继续努力吧,星际漫游靠你们来实现了
地球人将征服宇宙。
hdbjgh
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Re: 中国火星探测器气动设计已完成 正在试验验证
March 12, 2018, 06:11:21 AM
#4
天文科技突飞猛进,火星探测器气动计划完成。为中国航天技术发展而骄傲,自豪。
dfgytr
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Re: 中国火星探测器气动设计已完成 正在试验验证
March 12, 2018, 08:52:51 AM
#5
中国高科技的突飞猛进!让世界震惊!航天技术更是走在了世界的最前列!为祖国自豪,为祖国骄傲!向中国高科技人员致敬!
sfytrg
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Re: 中国火星探测器气动设计已完成 正在试验验证
March 12, 2018, 01:15:50 PM
#6
这种一丝不苟严谨的科学态度非常令人敬佩,火星探测虽然有美国等已经先期进行,但是中国探测火星却是第一次,不得不小心谨慎。
cbvxbh
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Re: 中国火星探测器气动设计已完成 正在试验验证
March 12, 2018, 06:09:12 PM
#7
说实话,科学家比那些小鲜肉强万倍,他们总是会给我们惊喜,为自己生在中国感到骄傲
qiushen
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Re: 中国火星探测器气动设计已完成 正在试验验证
March 12, 2018, 06:26:59 PM
#8
中国科技是一日千里呀,希望有一天我们的科技远远甩开其他国家,一枝独秀。加油!科技工作者们!
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