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我國完成微牛級推進技術驗證
2020-01-06 21:56  www.korraniha.com

???????記者1日從中國航天科技集團五院502所獲悉,以微牛級變推力冷氣推進技術為依托,我國“天琴一號”衛星成功實現了“無拖曳控制”。

? ?? ?? ?? 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.

???????通俗來講,衛星的“無拖曳控制”,是指抵消除引力以外所有干擾衛星的力。衛星在天上飛,其所受的干擾力主要來自于大氣阻力、太陽光壓等,去掉這些干擾力,衛星才能成為一個“超靜超穩”的平臺,才能使空間引力波探測成為可能。微牛級變推力技術是實施無拖曳控制的前提,也是空間推進技術發展的重要方向。

? ?? ?? ?? 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,科研人員再次對“天琴一號”衛星微牛級推進系統在軌數據進行了分析,結果表明主要技術參數達到了國際先進水平。這是我國首次完成微牛級變推力冷氣推進技術的在軌驗證,標志著我國成為了世界上第二個掌握該技術的國家,也使空間引力波探測邁出了實質性、關鍵性的一步。

? ?? ?? ?? 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.

???????這項技術牛在哪?近日發射的長征五號運載火箭,牛在力量大。而微牛級推進,牛在它的“微”,即使一個哈欠產生的推力都比它大許多倍。據502所專家介紹,1微牛的力大約等于1厘米頭發絲的重量,而“天琴一號”微牛級推進系統分辨率精度為微牛,也就是說能以相當于1毫米頭發的重量為單位,調整推力大小。

? ?? ?? ?? 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.

???????這樣微弱的推力,是為了持續抵消太陽光壓和大氣等對衛星的干擾。由于這些干擾力會隨著環境變化而產生極其微弱的變化,所以要求該套系統在提供極小、極精準推力的同時,能夠實現極精確的連續調節。據介紹,“天琴一號”微推進系統可以精確控制1小時勻速噴出僅1毫升的氣體,而控制流量的閥芯行程僅有幾十納米。

? ?? ?? ?? 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.

???????據了解,502所早在上世紀70年代便研制出我國第一代冷氣推進系統,并實現在軌應用。隨著多種類型空間推進系統的發展,冷氣推進系統一度淡出歷史舞臺。不過,由于其具備推力穩定、推力分辨率高、噪聲低、連續易調、變推力范圍大等優點,受到了新一代空間基礎物理科學探測任務、高精度重力場測量任務以及高精度對地觀測和衛星導航等空間任務的青睞。這些任務對衛星平臺的統一要求是“超靜低噪聲、超高精度、超高穩定度”,對此,冷氣推進系統是目前最優的選擇。

? ?? ?? ?? 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.

???????“天琴一號”衛星是我國“天琴”引力波探測計劃的首顆技術驗證衛星,于2019年12月20日發射升空。(劉旭輝?薛英民?記者付毅飛)

? ?? ?? ?? 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: