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Research on Adaptability of BDS Satellite in-Orbit Attitude Control Mode of Precise Orbit Determination

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Research on Adaptability of BDS Satellite in-Orbit Attitude ...

The 50 nm-thick yttrium iron garnet films with perpendicular magnetic anisotropy

第九届中国卫星导航学术年会

作者： Jin Chang qiuli chen Haihong Wang

Orbit dynamics model is one of the most important factors determining the precision of orbit *** also determines navigation and positioning accuracy of navigation satellite *** orbital perturbation force can be divided into two parts,conservative force and non-conservative *** medium and high earth orbit navigation satellites,solar radiation pressure is the non-conservative force,that is closely related to the in-orbit attitude control mode and engineering parameters of the *** BDS navigation satellite as example,the satellite in-orbit attitude control mode and the change of key parameters has been *** the basis of that,the difference of solar radiation pressure for three attitude control modes have been calculated and proposed,that are normal yaw-steering,yaw-fixed,and high-angle ***-parameter optical pressure analysis model has been *** on precise ephemeris determined by laser range data,adaptability of solar radiation pressure models of different attitude control modes and precise orbit determination has been analyzed and *** results show that,the attitude control mode is the decisive factor of solar radiation pressure model which can not be *** other amendments are not *** solar radiation pressure models suitable for attitude control modes have been adopted.T precision of orbit determination is sub-meter level,which be not affected by the attitude control mode.

关键词： BDS satellite precise orbit determination attitude control mode adaptability

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Chinese Physics B 2022年第4期31卷 67-72页

作者： Shuyao chen Yunfei Xie Yucong Yang Dong Gao Donghua Liu Lin Qin Wei Yan Bi Tan qiuli chen Tao Gong En Li Lei Bi Tao Liu Longjiang Deng National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of ChinaChengdu 610054China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

Yttrium iron garnet(YIG) films possessing both perpendicular magnetic anisotropy(PMA) and low damping would serve as ideal candidates for high-speed energy-efficient spintronic and magnonic ***,it is still challenging to achieve PMA in YIG films thicker than 20 nm,which is a major bottleneck for their *** this work,we demonstrate that this problem can be solved by using substrates with moderate lattice mismatch with YIG so as to suppress the excessive strain-induced stress release as increasing the YIG *** carefully optimizing the growth and annealing conditions,we have achieved out-of-plane spontaneous magnetization in YIG films grown on sGGG substrates,even when they are as thick as 50 ***,ferromagnetic resonance and spin pumping induced inverse spin Hall effect measurements further verify the good spin transparency at the surface of our YIG films.

关键词： spintronics perpendicular magnetic anisotropy magnetic thin film deposition by sputtering

Orbit residual analysis of BDS satellite based on ranging information and telemetry parameters

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Orbit residual analysis of BDS satellite based on ranging in...

Credibility Monitoring Research of BDS Based on LEO/INS

第十一届中国卫星导航年会

作者： Xu Zhang Hui Yang qiuli chen chen Wang Beijing Institute of Spacecraft System Engineering GNSS Research Center Wuhan University

Navigation satellites provide navigation, positioning, and timing services to users by broadcasting navigation ephemeris. The ground operation control system establishes a space reference to maintain

关键词： BDS satellite ranging information telemetry parameter orbit residual

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Credibility Monitoring Research of BDS Based on LEO/INS

Research on the verification of autonomous navigation technology based on inter-satellite link of BDS satellite

第十四届中国卫星导航年会

作者： Kai Yin Rui Li Zishan Zhao qiuli chen Beihang University China Academy of Space Technology

The reliability of satellites navigation system has always been the focus of international community,the risks of integrity and hostile interference are important factors affecting the reliability of airborne satellites navigation *** satellites with advantages of running in low orbits,having rapid change of satellite geometry and strong anti-interference capability of satellite signal,can significantly enhance the credibility of *** when most or even all satellites are spoofed,LEO satellites and BDS navigation system can hardly detect and recognize ***,we add inertial navigation system as an independent navigation source to the whole system and propose a credibility algorithm based on inertial navigation system,combining INS with all visible satellites to detect and recognize fault satellites in more directions,constructing chi-square test statistics based on the Kalman Filter innovation sequence on the basis of satisfying the need of *** simulation results show that LEO/INS-aided system can detect and recognize fault satellites in more than one *** the indexes of 90% integrity default detection rate and recognition rate,compared with single BDS system,the two indexes of the INS-aided system improve about 20% and 40% *** hostile faults,the LEO satellites can significantly improve the anti-spoofing performance of integrated navigation system,the detection rate increases about 25% and the recognition rate increases more than 30%.

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Research on the verification of autonomous navigation techno...

A High Dynamic Positioning Algorithm for Ka Band LEO Satellites in Beam Polling Mode

第十一届中国卫星导航年会

作者： qiuli chen Ying Wu Haihong Wang Weisong Jia Beijing Institute of Spacecraft System Engineering

Up to now, the new generation of BDS-3 system has nearly completed the global networking. Different from the BDS-2 satellite, the BDS-3 satellite has the inter-satelliteranging function supported by t

关键词： BDS satellite Inter-satellite Link autonomous navigation

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A High Dynamic Positioning Algorithm for Ka Band LEO Satelli...

Design and Verification of Long-term Reliable Autonomous Navigation System of Navigation Satellite

第十四届中国卫星导航年会

作者： Mingxia Li Yun Zhao qiuli chen Ping Li Beihang University China Academy of Space Technology

Aiming at the problem of low precision positioning solutions for high dynamic users caused by Ka band LEO communication and navigation integrated satellites in point beam polling mode,a LEO satellite/inertial integrated navigation and positioning algorithm based on accumulated error estimation and correction is proposed.A extended Kalman filtering estimator is used to achieve the state error estimation at the output of inertial *** the error correction,the rapid growth of nonlinear error is suppressed when low precision inertial sensors is used for integrated navigation,and the positioning accuracy for high dynamic users is *** simulation results show that in the condition of low precision inertial navigation the proposed algorithm can significantly improve the dynamic positioning *** three dimensional positioning and velocity measurement accuracy of high dynamic users can reach below 10m(1 σ)and 0.1m/s(1 σ) respectively.

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Design and Verification of Long-term Reliable Autonomous Nav...

鱼群启发的三维Ad hoc网络节点随机移动优化模型

第十一届中国卫星导航年会

作者： Weisong Jia qiuli chen Ying Wu Haihong Wang Beijing Institute of Spacecraft System Engineering

Beidou-3 global navigation satellite system(GNSS) has the capability of autonomous navigation. Without the support of the ground system for a long time, it uses the pre-recorded ground auxiliary data,

关键词： Long-term Reliable Design Verification Autonomous Navigation

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仪器仪表学报 2014年第12期35卷 2826-2834页

作者：何明陈秋丽陈希亮郑翔陈剑解放军理工大学指挥信息系统学院南京210007 解放军第61研究所北京100071 解放军理工大学通信工程学院南京210007

为有效指导三维环境中的移动自组织无线网络(MAWN)的部署,并提高网络感知能力,受鱼群启发,构建了一种新型三维节点半随机移动模型(3D_NMM)。本文在三维高斯半马尔科夫移动模型(3D-SGM)上增加节点排斥运动状态,设计了新的节点状态转换方... 详细信息

为有效指导三维环境中的移动自组织无线网络(MAWN)的部署,并提高网络感知能力,受鱼群启发,构建了一种新型三维节点半随机移动模型(3D_NMM)。本文在三维高斯半马尔科夫移动模型(3D-SGM)上增加节点排斥运动状态,设计了新的节点状态转换方式;在随机路点移动模型上构建虚拟边界,提出了一种新的边界处理方法。仿真实验表明,3D_NMM较3D-SGM在空间探测率、实时覆盖率及初始探测花费上具有优势,其中实时覆盖率提高了62.2%,初始探测95%区域的时间花费降低了77%,有效提升了移动无线自组织网络的应用效能。

关键词：移动自组织无线网络节点移动模型鱼群启发高斯半马尔科夫移动模型

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面向异构水声传感网的分布式负载均衡算法

仪器仪表学报 2017年第5期38卷 1232-1239页

作者：陈秋丽何明凌晨刘勇仇功达解放军理工大学指挥信息系统学院南京210007 装备发展部第61研究所北京100071 后勤保障部科学研究所北京100071

水声传感网中节点能量有限,大多采用多跳通信。为解决通信过程中的负载均衡问题,提出了一种基于质距优化机制的水声传感器网络多跳通信策略,设计自适应负载均衡算法,加权评估普通传感器的通信质量与距离选择下一跳;在此基础上,提出了基... 详细信息

水声传感网中节点能量有限,大多采用多跳通信。为解决通信过程中的负载均衡问题,提出了一种基于质距优化机制的水声传感器网络多跳通信策略,设计自适应负载均衡算法,加权评估普通传感器的通信质量与距离选择下一跳;在此基础上,提出了基于AUVs节点的数据平衡传输算法,分布式的实现了网络性能的进一步优化,以获得网络生命周期的最大化。最后,通过仿真实验验证了该方法的合理性和有效性。

关键词：水声传感器网络多跳通信优化机制数据平衡传输算法负载均衡