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SJ-10 Recoverable Satellite for Space Microgravity Experiments
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作者 HU Wenrui KANG Qi +1 位作者 DUAN Enkui LONG Mian 《空间科学学报》 CAS CSCD 北大核心 2020年第5期648-654,共7页
SJ-10 is a recoverable scientific experiment satellite specially for the space experiments of microgravity physics science and space life science.This mission was officially started on 31 December 2012,and the satelli... SJ-10 is a recoverable scientific experiment satellite specially for the space experiments of microgravity physics science and space life science.This mission was officially started on 31 December 2012,and the satellite was launched on 6 April 2016.This paper introduces briefly the SJ-10 mission,the progress of SJ-10 engineering and the project constitution of sciences experiments onboard SJ-10.The purpose of this mission is to discover the law of matter movement and the rule of life activity that cannot be discovered on the ground due to the existence of gravity,and to know the acting mechanism on organisms by the complex radiation of space that cannot be simulated on the ground. 展开更多
关键词 microgravity physics space life science space microgravity experiments Recoverable satellite
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Fuzzy adaptive robust control for space robot considering the effect of the gravity 被引量:14
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作者 Qin Li Liu Fucai +1 位作者 Liang Lihuan Gao Jingfang 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2014年第6期1562-1570,共9页
Space robot is assembled and tested in gravity environment, and completes on-orbit service(OOS) in microgravity environment. The kinematic and dynamic characteristic of the robot will change with the variations of g... Space robot is assembled and tested in gravity environment, and completes on-orbit service(OOS) in microgravity environment. The kinematic and dynamic characteristic of the robot will change with the variations of gravity in different working condition. Fully considering the change of kinematic and dynamic models caused by the change of gravity environment, a fuzzy adaptive robust control(FARC) strategy which is adaptive to these model variations is put forward for trajectory tracking control of space robot. A fuzzy algorithm is employed to approximate the nonlinear uncertainties in the model, adaptive laws of the parameters are constructed, and the approximation error is compensated by using a robust control algorithm. The stability of the control system is guaranteed based on the Lyapunov theory and the trajectory tracking control simulation is performed. The simulation results are compared with the proportional plus derivative(PD) controller, and the effectiveness to achieve better trajectory tracking performance under different gravity environment without changing the control parameters and the advantage of the proposed controller are verified. 展开更多
关键词 Fuzzy adaptive microgravity Robustness space robot Trajectory tracking control
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The impact of space environment on gene expression in Arabidopsis thaliana seedlings 被引量:3
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作者 LI HuaSheng LU JinYing +6 位作者 ZHAO Hui SUN Qiao YU FuTong PAN Yi CHEN Yu SU Liang LIU Min 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2017年第6期902-910,共9页
One of the important questions in space biology is the mechanisms underlying plant responses to an outer space environment,i.e.,how gene expression is altered in space.In this study,the transcriptome of Arabidopsis th... One of the important questions in space biology is the mechanisms underlying plant responses to an outer space environment,i.e.,how gene expression is altered in space.In this study,the transcriptome of Arabidopsis thaliana seedlings was analyzed as a part of Germany SIMBOX(science in microgravity box)spaceflight experiment on Shenzhou 8 spacecraft.This experiment involved the following treatments:spaceflight with microgravity(Fμg),spaceflight with 1g centrifugal force(F 1g),and ground 1g control(G 1g).Gene chips were used to screen gene expression differences in Arabidopsis thaliana seedlings among these treatments.Microarray analysis revealed that 621 genes were differentially expressed in samples Fμg vs.G 1g,249 genes in samples F 1g vs.G 1g,and 368 genes in samples Fμg vs.F 1g.Gene ontology analysis indicated that the genes were involved in metabolism of stress response,gravitropic response,and DNA damage and repair,suggesting that plants adjust these metabolic pathways to space environmental stress,microgravity,and radiation. 展开更多
关键词 Arabidopsis thaliana space flight microgravity microarray gene expression profile
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