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A Brief Introduction to the International lunar Research Station program and the Interstellar Express Mission

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空间科学学报 2022年第4期42卷 511-513页

作者： XU Lin LI Hui PEI Zhaoyu ZOU Yongliao WANG Chi State Key Laboratory of space Weather/National space Science center Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 lunar exploration and space Engineer center China National Space AdministrationBeijing 100190

China has planned and implemented a series of lunar and deep space exploration programs since the first lunar exploration satellite Chang’E-1 launched in *** the future,China has initiated the international lunar research station program,which aims to build a shared platform on the Moon jointly with many other countries for long-term and continuous lunar exploration,lunar-based observations and experiments,as well as in-situ resource *** addition,China has also proposed an interstellar express mission to unveil the mysteries of the outer heliosphere,nearby interstellar space,and their *** paper gives a brief introduction to the International lunar Research Station program and the Interstellar Express mission.

关键词： lunar exploration Deep space exploration International lunar research station Outer Heliospheric exploring International cooperation

Approach of fault diagnosis based on similarity degree matching distance function

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Science China(Technological Sciences) 2013年第11期56卷 2709-2720页

作者： WANG RiXin JIN Yang XU MinQiang Deep space exploration Research center Harbin Institute and Technology

A new diagnosis method based on the similarity degree matching distance function is *** method solves the problem that the traditional fault diagnosis methods based on transition system model cannot deal with the"special state"which cannot match the target states *** evaluating the relationship between the observation and the target states,this paper first defines a new distance function based on the viewpoint of energy to measure the distance between two attribute *** that,all the distances of the attributes in the state vector are used to synthesize the distance between two *** calculating the similarity degree between two states,a trend evaluation method is *** analyzes the main direction of the trend of the state transfer according to the distances between the observation and each target state and their historical *** the diagnosis method to a primary power subsystem of a satellite,the simulation result shows that it is effective.

关键词： fault diagnosis similarity degree matching measurement-scale distance function trend evaluation

Scientific Progress in China's lunar exploration program

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空间科学学报 2014年第5期34卷 525-534页

作者： XU Lin OUYANG Ziyuan Key Laboratory of lunar and Deep space exploration National Astronomical ObservatoriesChinese Academy of Sciences

Chang'E-1, the first lunar mission in China, was successfully launched on October 24,2007, which opened the prelude of China's lunar exploration program. Later on, the Chang'E-2 and Chang'E-3 satellites were successfully launched in 2010 and 2013, respectively. In order to achieve the science objectives, various payloads boarded the spacecraft. The scientific data from these instruments were received by Beijing and Kunming ground stations simultaneously. Up to now, about 5.628 Terabytes of raw data were received totally. A series of research results has been achieved. This paper presents a brief introduction to the main scientific results and latest progress from Chang'E-3 mission.

关键词： China’s lunar exploration program Chang’E satellite Scientific result Moon

Overview of the Latest Scientific Achievements of Chang'E-4 Mission of China's lunar exploration Project

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空间科学学报 2022年第4期42卷 519-535页

作者： CHEN Yuesong TANG Yuhua FAN Yu YAN Jun WANG Chi ZOU Yongliao National space Science center Chinese Academy of SciencesBeijing 100190 lunar exploration and space Engineering center Beijing 100190 National Astronomical Observatories Chinese Academy of SciencesBeijing 100101 State Key Laboratory of space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190

On 3 January 2019,the Chang’E-4 probe successfully landed in the Von Kármán crater in the South Pole-Aitken Basin on the far side of the *** 4 January,the Yutu-2 rover was successfully separated from the lander and the scientific payloads were powered on to conduct scientific *** was the first time that manmade probe achieved soft landing and roving on the far side of the *** on the data obtained by scientific payloads on the Chang’E-4,the research team obtained geological information such as landing area topography,structure and composition;demonstrated the existence of deep materials—mainly olivine and low-calcium pyroxene in the South Pole-Aitken Basin;achieved high-precision imaging of the layered structure of lunar subsurface in the roving area;discovered carbonaceous spheroidal meteorite residues and impact glass;preliminarily revealed the geological evolutionary history of the South Pole-Aitken Basin;for the first time,obtained information of the radiation dose of energetic particles at the lunar surface and the structure of the lunar neutral atomic energy spectrum;discovered the lunar mini-magnetosphere and contributed new knowledge of the radiation hazards at the lunar *** article summarizes the latest scientific achievement from the Chang’E-4 mission over the past three years.

关键词： Chang’E-4 Scientific objectives Scientific payloads Scientific achievement

Satellite range scheduling with the priority constraint: An improved genetic algorithm using a station ID encoding method

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Chinese Journal of Aeronautics 2015年第3期28卷 789-803页

作者： Li Yuqing Wang Rixin Liu Yu Xu Minqiang Deep space exploration Research center Harbin Institute of Technology Harbin University of Commerce

Abstract Satellite range scheduling with the priority constraint is one of the most important prob lems in the field of satellite operation. This paper proposes a station coding based genetic algorithm to solve this problem, which adopts a new chromosome encoding method that arranges tasks according to the ground station ID. The new encoding method contributes to reducing the complex ity in conflict checking and resolving, and helps to improve the ability to find optimal resolutions. Three different selection operators are designed to match the new encoding strategy, namely ran dom selection, greedy selection, and roulette selection. To demonstrate the benefits of the improved genetic algorithm, a basic genetic algorithm is designed in which two cross operators are presented, a singlepoint crossover and a multipoint crossover. For the purpose of algorithm test and analysis, a problemgenerating program is designed, which can simulate problems by modeling features encountered in realworld problems. Based on the problem generator, computational results and analysis are made and illustrated for the scheduling of multiple ground stations.

关键词： Genetic algorithm Ground space scheduling Priority Satellite range scheduling space communication

Data processing and preliminary results of the Chang'e-3 VIS/NIR Imaging Spectrometer in-situ analysis

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Research in Astronomy and Astrophysics 2014年第12期14卷 1578-1594页

作者： Bin Liu Chun-Lai Li Guang-Liang Zhang Rui Xu Jian-Jun Liu Xin Ren Xu Tan Xiao-Xia Zhang Wei Zuo Wei-Bin Wen Key Laboratory of lunar and Deep space exploration National Astronomical ObservatoriesChinese Academy of Sciences Key Laboratory of space Active Opto-Electronics Technology Shanghai Institute of TechnicalPhysics Chinese Academy of Sciences

The Chang＇e-3 Visible and Near-infrared Imaging Spectrometer （VNIS） is one of the four payloads on the Yutu rover. After traversing the landing site during the first two lunar days, four different areas are detected, and Level 2A and 2B ra- diance data have been released to the scientific community. The released data have been processed by dark current subtraction, correction for the effect of temperature, radiometric calibration and geometric calibration. We emphasize approaches for re- flectance analysis and mineral identification for in-situ analysis with VNIS. Then the preliminary spectral and mineralogical results from the landing site are derived. After comparing spectral data from VNIS with data collected by the Ma instrument and samples of mare that were returned from the Apollo program, all the reflectance data have been found to have similar absorption features near 1000 nm except lunar sample 71061. In addition, there is also a weak absorption feature between 1750-2400nm on VNIS, but the slopes of VNIS and Ma reflectance at longer wavelengths are lower than data taken from samples of lunar mare. Spectral parameters such as Band centers and Integrated Band Depth Ratios are used to analyze mineralogical features. The results show that detection points E and N205 are mixtures of high-Ca pyroxene and olivine, and the composition of olivineat point N205 is higher than that at point E, but the compositions of detection points S3 and N203 are mainly olivine-rich. Since there are no obvious absorption features near 1250 nm, plagioclase is not directly identified at the landing site.

关键词： Chang'e-3 -- VNIS -- in-situ analysis -- data processing

Early Sensor Fault Detection Based on PCA and Clustering Analysis

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Journal of Harbin Institute of Technology(New Series) 2014年第6期21卷 113-120页

作者： Xue-Bing Gong Ri-Xin Wang Min-Qiang Xu Deep space exploration Research center Harbin Institute of Technology

This paper proposes a novel scoring index for the early sensor fault detection in order to make full use of massive archived spacecraft telemetry *** early detection of sensor faults is made by using the index constructed by the K-means algorithm and PCA *** sensor fault detection includes the learning phase and monitoring *** amplitude of sensor fault has been always increasing when the performance of sensors deteriorates during a *** proposed index can detect the smaller sensor faults than the squared prediction error( SPE) index which means it can discover the sensor faults earlier than the *** simulation results demonstrate the effectiveness and feasibility of the proposed index which can decrease the check-limit as much as 40% than SPE in the same magnitude of bias sensor fault.

关键词： early fault detection PCA K-means algorithm SPE Sensor faults

Investigation on the development of deep space exploration

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Science China(Technological Sciences) 2012年第4期55卷 1086-1091页

作者： WU WeiRen LIU WangWang QIAO Dong JIE DeGang School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China center of lunar exploration and Aerospace Engineering Beijing 100037China

Deep space exploration is the term used for the exploration of the Moon and the celestial bodies or space beyond the Moon, which is an important part of human space activities. Firstly, the development of deep space exploration (not including the Moon) during the last few decades is summarized. Secondly, the development trend of different space countries and regions is analyzed. Then the experience and enlightenment of deep space exploration are briefly discussed. Some suggestions for China's future deep space exploration are given in the end.

关键词： deep space exploration space program trend of development enlightenment

Observations and interpretations of geomorphologic features in the Tianwen-1 landing area on Mars by using orbital imagery data

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Earth and Planetary Physics 2023年第3期7卷 331-346页

作者： Hai Huang Xing Wang Yuan Chen Qing Zhang FeiYue Zhao Xin Ren XingGuo Zeng Wei Yan WangLi Chen Bin Liu DaWei Liu LianBo Fu JianJun Liu Key Laboratory of lunar and Deep space exploration National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and space Science University of Chinese Academy of SciencesBeijing 100049China

China’s first Mars exploration mission,Tianwen-1,successfully landed in southern Utopia Planitia on Mars on May 15,*** work presents a detailed investigation of the geologic context of the landing area surface for this mission based on orbital remotesensing *** constructed a geomorphologic map for the Tianwen-1 landing *** of our detailed geomorphologic map show several major landforms within the landing area,including rampart craters,mesas,troughs,cones,and *** of materials on the landing area surface indicates that most of the landing area is covered by Martian *** aeolian ridges are widely distributed within the landing area,indicating the surface contexts were(and still are)modified by regional *** addition,a crater counting analysis indicates the landing area has an absolute model age of~3.3 Ga and that a later resurfacing event occurred at~1.6 ***,we outline four formational scenarios to test the formation mechanisms for the geomorphologic features on the landing area *** most likely interpretation to explain the existence of the observed surface features can be summarized as follows:A thermal influence may have played an important role in the formation of the surface geomorphologic features;thus,igneous-related processes may have occurred in the landing *** ice may also have been involved in the construction of the primordial surface *** resurfacing events and aeolian processes buried and modified the primordial surface.

关键词： Mars Utopia Planitia Tianwen-1 geomorphologic features water ice heat source