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The Sixth Academy of CASC successfully developed China's first newton-class Hall-effect thruster航天科技集团六院研制成功我国首款牛级霍尔推力器
中国航天科技集团六院 Today
近日,航天科技集团六院801所研制的我国首款20千瓦大功率霍尔推力器成功完成点火试验,点火时间累计达8小时,点火次数超过30次。该推力器的成功研发,实现了我国霍尔电推力器推力从毫牛级向牛级的跨越。
▲ 20千瓦大功率霍尔推力器点火
试验过程中,推力器点火可靠,运行平稳,工作参数稳定,实测推力1牛,比冲3068秒,效率大于70%,性能指标达到国际先进水平。
▲ 部分霍尔推力器产品
据悉,该推力器在设计中采用了空心阴极中置、磁屏蔽长寿命等新技术。研制中先后攻克大电流空心阴极、轻质小型化加速器、高效热管理、高压大功率稳定放电等关键技术,具有推力大、比冲高、工作寿命长、可靠性高等特点,可为大型GEO(地球静止轨道)卫星、中型/重型全电推平台、深空探测器、地球轨道空间运输平台、太空摆渡车等航天器的轨道机动转移,在轨位保和姿态控制等任务提供高效动力支撑。
China Aerospace Science and Technology Corporation
When will the probe and rover reach Mars if launch in July 2020?China to launch Mars probe in July
2020-01-23 16:20:51 Xinhua
China announced that it will launch its first Mars mission probe in July this year, China Youth Daily reported Thursday, adding that this is the first time the country disclosed the launch month of its Mars exploration program.
The Mars probe will be sent by the Long March-5 Y4 carrier rocket, said the newspaper, citing sources from the China Aerospace Science and Technology Corporation (CASC).
The Long March-5 Y4 rocket has recently completed a 100-second test for its high thrust hydrogen-oxygen engine, which is the last engine examination before the final assembly.
According to the CASC, China will send a probe to orbit and land and deploy a rover on Mars.
In 2020, the Long March-5 rocket will carry out several missions, including the Mars probe launch and the lunar sample return.
A total of 24 high thrust hydrogen-oxygen rocket engine tests will be conducted this year for these missions.
When will the probe and rover reach Mars if launch in July 2020?
The probe would take 7 months to reach Mars, so sometimes around Feb, 2021, and would land on Mars before July, 2021.Lunar, Mars exploration missions set for next year
By ZHAO LEI | China Daily | Updated: 2019-10-24 03:33
Photo taken by the rover Yutu 2 (Jade Rabbit-2) on Jan 11, 2019 shows the lander of the Chang'e 4 probe. [Photo/Xinhua/China National Space Administration]
Chinese scientists are determined to carry out two of the nation's most challenging space endeavors next year: its Chang'e 5 lunar mission and first Mars exploration.
Ye Peijian, a leading space exploration researcher at the China Academy of Space Technology, said in Beijing recently that he and his colleagues are confident they will honor their commitment to the Chinese people, that of commencing with the Chang'e 5 and Mars missions in 2020.
"We have been improving the overall reliability of the Chang'e 5 mission since it was postponed, and we continue to make plans for all possible contingencies to make sure the program will succeed," he said.
Ye, 74, is one of the most accomplished space researchers in China and was recently awarded the honorary national title of People's Scientist. He has played major roles in a number of significant space projects, including the Chang'e lunar exploration program.
The original plan for the Chang'e 5 mission was to launch it at the end of 2017. However, the failure of the second launch of the Long March 5 carrier rocket, the country's largest and mightiest rocket and the one tasked with ferrying the Chang'e 5 probe, led to the lunar mission's delay.
If the Chang'e 5 program succeeds, it will make China the third nation to bring lunar samples back to Earth, after the United States and Russia.
China has launched four lunar probes since 2007.
In December 2013, the third probe became the first Chinese spacecraft to land on the lunar surface and released the first Chinese lunar rover.
The ongoing Chang'e 4 mission, launched in December, has been giving mankind its first close-up look at the moon's far side — a region that never faces Earth — accomplishing a goal sought by scientists for decades.
"We are also doing research and making plans for the Chang'e 6 mission," Ye said. "If Chang'e 5 is successful, then we will send Chang'e 6 to the lunar south pole to collect samples and bring them back because it is scientifically important for scientists to survey and investigate the south pole."
He said the Mars exploration program is proceeding well. China's first planetary expedition, it is expected to land a probe on the Martian surface before July 2021.
"Though it has been preceded by other countries' Mars missions, ours will produce better performance in terms of technological level and engineering capability," Ye said. "We will use the probe to fulfill three scientific objectives — orbiting the red planet for comprehensive observation, landing on Martian soil and using a rover to explore the landing site. If we succeed, this will become the world's first Mars expedition accomplishing all three goals with one probe."
The China National Space Administration says the country's first Martian probe will conduct scientific investigations of Martian soil, the planet's geological structure as well as its environment and also search for the possible existence of water.
The probe will take about seven months to reach the red planet.
so no direct insertion into the mars orbit?The probe would take 7 months to reach Mars, so sometimes around Feb, 2021, and would land on Mars before July, 2021.
From Ye Peijian presentation, it look direct.so no direct insertion into the mars orbit?
how many rounds the probe gonna do around the earth before transfer to the mars' orbit?