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我国完成微牛级推进技术验证
2020-01-08 01:26  www.equintos.com

???????记者1日从中国航天科技集团五院502所获悉,以微牛级变推力冷气推进技术为依托,我国“天琴一号”卫星成功实现了“无拖曳控制”。

? ?? ?? ?? Reporters from China Aerospace Science and Technology Group, the Fifth Hospital 502 learned, based on micro-Niu-grade thrust cold-conditioning propulsion technology, China's "Tianqin 1" satellite successfully achieved" no towing control.

???????通俗来讲,卫星的“无拖曳控制”,是指抵消除引力以外所有干扰卫星的力。卫星在天上飞,其所受的干扰力主要来自于大气阻力、太阳光压等,去掉这些干扰力,卫星才能成为一个“超静超稳”的平台,才能使空间引力波探测成为可能。微牛级变推力技术是实施无拖曳控制的前提,也是空间推进技术发展的重要方向。

? ?? ?? ?? Generally speaking, a satellite's "no towing control" refers to the force that eliminates any interference with the satellite other than gravity. Satellite flying in the sky, its interference force mainly comes from the atmospheric resistance, solar light pressure and so on, remove these interference forces, then the satellite can become a "super-static" platform, so that the space gravitational wave detection can be possible. The technology of micro-Niu grade variable thrust is the premise of implementing no towing control, and it is also an important direction for the development of space propulsion technology.

???????1日,科研人员再次对“天琴一号”卫星微牛级推进系统在轨数据进行了分析,结果表明主要技术参数达到了国际先进水平。这是我国首次完成微牛级变推力冷气推进技术的在轨验证,标志着我国成为了世界上第二个掌握该技术的国家,也使空间引力波探测迈出了实质性、关键性的一步。

? ?? ?? ?? On the 1st, researchers once again analyzed the orbit data of the \"tianqin 1\" satellite micro cow propulsion system, and the results show that the main technical parameters have reached the international advanced level. This is the first time that our country has completed the in-orbit verification of micro cow grade variable thrust air-conditioning propulsion technology, which indicates that our country has become the second country in the world to master the technology, and also makes the space gravitational wave detection take a substantial and critical step.

???????这项技术牛在哪?近日发射的长征五号运载火箭,牛在力量大。而微牛级推进,牛在它的“微”,即使一个哈欠产生的推力都比它大许多倍。据502所专家介绍,1微牛的力大约等于1厘米头发丝的重量,而“天琴一号”微牛级推进系统分辨率精度为微牛,也就是说能以相当于1毫米头发的重量为单位,调整推力大小。

? ?? ?? ?? Where is the technical cow? Recently launched Long March 5 launch vehicle, cattle in the strength. And the micro cow class pushes, the cow in its "micro ", even if a yawn produces thrust many times more than it does. According to 502 experts, the force of a micro cow is about equal to the weight of a 1cm hair, while the resolution accuracy of the "tianqin 1" micro cow propulsion system is micro cow, that is, it can adjust the thrust in units equal to the weight of a 1mm hair.

???????这样微弱的推力,是为了持续抵消太阳光压和大气等对卫星的干扰。由于这些干扰力会随着环境变化而产生极其微弱的变化,所以要求该套系统在提供极小、极精准推力的同时,能够实现极精确的连续调节。据介绍,“天琴一号”微推进系统可以精确控制1小时匀速喷出仅1毫升的气体,而控制流量的阀芯行程仅有几十纳米。

? ?? ?? ?? Such a weak thrust is to continue to offset the sun's light pressure and atmospheric interference with the satellite. Because these interference forces will produce extremely weak changes as the environment changes, the system is required to achieve extremely accurate continuous regulation while providing minimal and extremely accurate thrust. According to the "tianqin 1" micro propulsion system can accurately control the 1 hour uniform emission of only 1 ml of gas, while the flow control of the spool travel only a few tens of nanometers.

???????据了解,502所早在上世纪70年代便研制出我国第一代冷气推进系统,并实现在轨应用。随着多种类型空间推进系统的发展,冷气推进系统一度淡出历史舞台。不过,由于其具备推力稳定、推力分辨率高、噪声低、连续易调、变推力范围大等优点,受到了新一代空间基础物理科学探测任务、高精度重力场测量任务以及高精度对地观测和卫星导航等空间任务的青睐。这些任务对卫星平台的统一要求是“超静低噪声、超高精度、超高稳定度”,对此,冷气推进系统是目前最优的选择。

? ?? ?? ?? It is understood that 502 as early as the 1970s to develop China's first-generation air-conditioning propulsion system, and to achieve in-orbit applications. With the development of various types of space propulsion system, the cold-conditioning propulsion system has once faded out of the historical stage. However, because it has the advantages of stable thrust, high thrust resolution, low noise, continuous easy adjustment and large range of variable thrust, it has been favored by the new generation of space-based physical science detection mission, high-precision gravity field measurement mission and high-precision space mission such as ground observation and satellite navigation. The unified requirements of these missions for the satellite platform are "ultra-static low noise, ultra-high precision, ultra-high stability ", for which, the air-conditioning propulsion system is the best choice at present.

???????“天琴一号”卫星是我国“天琴”引力波探测计划的首颗技术验证卫星,于2019年12月20日发射升空。(刘旭辉?薛英民?记者付毅飞)

? ?? ?? ?? The "Tianqin-1" satellite, the first technical verification satellite of our country's" Tianqin "gravitational wave detection program, was launched on December 20,2019. (Xuhui Liu? Ying - min Xue? Reporter: