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High-precision analytical solutions for Earth coverage of constellation equipped with reentry glide vehicles

Chinese Journal of Aeronautics 2024年第9期37卷 385-398页

作者： Ping MA Weibo SUN Jie GAO Tao CHAO Control and Simulation Center Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Spacecraft System Engineering Beijing 100094China

To efficiently and accurately design satellite constellations equipped with Reentry Glide Vehicles(RGVs),new analytical solutions are developed for calculating their coverage ***,a new coverage model is established by approximating the Reentry Reachable Domain(RRD).However,the computation of real-time relative distances between satellites and targets,which is essential for coverage analysis based on this model,imposes a significant compu-tational *** address this challenge,a coverage analysis method based on two-dimensional map theory is *** method represents the coverage conditions of a target as a fixed area on a two-dimensional map and transforms the satellite trajectory into a series of parallel *** determining the intersection points between these lines and the area boundaries,the coverage ana-lytical solutions for a target point are *** this basis,coverage theorems are presented for rapid calculation of the constellation coverage performance for an *** results demon-strate the effectiveness and high precision of the proposed analytical solutions.

关键词： Constellation Analytical solutions Reentry glide vehicle Reentry reachable domain Two-dimensional map

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Autonomous relative optical navigation based on unified modeling of external systematic errors

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Chinese Journal of Aeronautics 2024年第3期37卷 282-289页

作者： Dayi WANG Bowen SUN Maodeng LI Jiaxing LI Haiyin ZHOU Beijing Institute of Spacecraft System Engineering Beijing 100191China College of Sciences National University of Defense TechnologyChangsha 410073China National Key Laboratory of Space Intelligent Control Beijing Institute of Control EngineeringBeijing 100191China

To solve the problem that external systematic errors of the optical camera cannot be fully estimated due to limited computing resources,a unified dimensionality reduction representation method for the external systematic errors of the optical camera is proposed,and autonomous relative optical navigation is *** camera translational and misalignment errors are converted into a three-dimensional rotation error,whose differential model can be established through specific attitude control and appropriate ***,the rotation error and the relative motion state are jointly estimated in an augmented Kalman filter *** with the traditional method that estimates the camera translational and misalignment errors,the proposed method reduces the computational complexity in that the estimated state dimension is ***,as demonstrated by numerical simulation,the estimation accuracy is improved significantly.

关键词： Unified model Systematic errors Optical navigation Observability analysis Calibration

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Progress and Prospects of Cryogenic Thermal control technology for Space Power Transmission Systems Based on High-Temperature Superconducting Cables

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Microgravity Science and technology 2025年第3期37卷 1-20页

作者： Xiao, Kai Wang, Ye Wang, Huizhi Weng, Fangjing Wu, Qi Li, Guoguang Liu, Sixue Zhang, Hongxing Miao, Jianyin National Key Laboratory of Spacecraft Thermal Control Beijing Institute of Spacecraft System Engineering China Academy of Space Technology Beijing 100094 China

As spacecraft continue to advance in scale, performance, and capabilities, their operational power requirements are projected to rise from kilowatts to megawatts or even gigawatts with voltages reaching the megavolt level. Under such conditions, traditional copper-based power transmission systems will incur substantial energy losses, resulting in an increase in both size and mass. Conversely, high-temperature superconducting (HTS) cables exhibit zero resistance and enable high-capacity transmission at liquid nitrogen temperatures, thereby facilitating lossless power and presenting significant potential for space application. The unique challenges presented by the space environment necessitate the development of specialized cryogenic thermal control systems (CTCSs) specifically designed for space-based HTS cables, underscoring the need for targeted research on CTCSs. This study presents a CTCS that employs pulse tube cryocoolers for cryocooling, cryogenic loop heat pipes for heat transfer, and cryogenic insulation technology to minimize parasitic heat leakage. A comprehensive examination of space cryogenic technologies, an analysis of existing problems, and a discourse on prospective research are presented. © The Author(s), under exclusive licence to Springer Nature B.V. 2025.

关键词： Cryocoolers Cryogenic insulation technology Cryogenic loop heat pipes Cryogenic thermal control system Space high-temperature superconducting cables

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IEEE Transactions on Aerospace and Electronic Systems 2025年第3期61卷 7597-7609页

作者： Wu, Wenjing Fu, Hanjing Cui, Kaixin Liu, Zhigang Yang, Dong Shi, Dawei Beijing Institute of Technology MIIT Key Laboratory of Servo Motion System Drive and Control School of Automation Beijing100081 China Beijing Institute of Spacecraft System Engineering Beijing100094 China

Data limitation caused by the difficulty of data acquisition, the high cost of data collection, and the changes of working conditions is a serious obstacle to the accurate lithium-ion battery state of health (SOH) estimation for spacecrafts system. To achieve accurate few-shot lithium-ion battery SOH estimation and enhance the adaptability of learning methods across varying working conditions, a domain similarity model agnostic meta-learning method is proposed. First, we design a dynamic–static feature extraction method to adequately exploit information from the limited battery data and link the obtained features by gray correlation coefficients to collect sufficient information. Then, by calculating the domain similarity between the training tasks through the maximum mean discrepancy algorithm, the training tasks are ranked to reduce the retraining time. Finally, an long short term memory (LSTM) model is added to the meta-learning framework to capture the long-term dependency relationships between SOH and time series of the voltage, and the ranked tasks are embedded in the meta-training process to improve adaptability in different working conditions. The effectiveness of the proposed method is validated by NASA and MIT datasets, and comparative experimental results illustrate that the proposed method average error is reduced by 73%, and the running speed is increased by 20% compared with traditional MAML in few-shot scenarios. © 1965-2011 IEEE.

关键词： State of charge

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Modeling and Experimental Study of an Open Two-Phase Loop Driven by Osmotic Pressure and Capillary Force

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Frontiers in Heat and Mass Transfer 2025年第1期23卷 55-70页

作者： Hanli Bi Zheng Peng Chenpeng Liu Zhichao Jia Guoguang Li Yuandong Guo Hongxing Zhang Jianyin Miao National Key Laboratory of SpacecraftThermal Control Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing100094China School of Aeronautical Science and Engineering Beihang UniversityBeijing100083China School of Energy and Environment Engineering University of Science and Technology BeijingBeijing100083China

As space technology advances,thermal control systems must effectively collect and dissipate heat from distributed,multi-source *** heat pipe is a highly reliable two-phase heat transfer component,but it has several limitations when addressing multi-source heat *** by the transport and heat dissipation system of plants,large trees achieve stable and efficient liquid supply under the influence of two driving forces:capillary force during transpiration in the leaves(pull)and root pressure generated by osmotic pressure in the roots(push).The root pressure provides an effective liquid supply with a driving force exceeding 2 MPa,far greater than the driving force in conventional capillary-pumped two-phase *** has shown that osmotic heat pipes offer a powerful driving force,and combining osmotic pressure with capillary force has significant ***,this paper designs a multi-evaporator,dual-drive two-phase loop,using both osmotic pressure and capillary force to solve the multi-source heat dissipation ***,a transmembrane water flux model for the osmotic pressure-driven device was established to predict the maximum heat transfer capacity of the dual-drive two-phase ***,an experimental setup for a multi-evaporator“osmotic pressure+capillary force”dual-drive two-phase loop was constructed,capable of transferring at least 235 W of power under a reverse gravity condition of 20 *** study also analyzed the effects of reverse gravity height,heat load distribution among the three evaporators,startup sequence,and varying branch resistances on the performance of the dual-drive two-phase loop.

关键词： Multi-heat sources osmotic pressure two-phase loop dual-drive loop heat pipe

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Remaining Useful Life Estimation of the Ultrasonic Motor Based on A Novel Exponential-Type Model and An Adaptive Particle Filter 10

Remaining Useful Life Estimation of the Ultrasonic Motor Bas...

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10th International Symposium on System Security, Safety, and Reliability, ISSSR 2024

作者： Yuanyuan, Liu Taichun, Qin China Electronics Technology Group Corporation Beijing China Beijing Institute of Spacecraft Environment Engineering Beijing China

ISBN: (纸本)9798350362930

Due to the advantages of small structure, fast response, large torque, and no magnetic interference, ultrasonic motors have been successfully applied to aerospace, automation, and medical equipment. However, few studies have attempted to obtain the precise remaining useful life (RUL) of ultrasonic motors under daily usage. In this paper, a novel exponential-Type model based on the adaptive particle filter (APF) method is proposed, which can realize the real-Time prediction for the RUL of an ultrasonic motor. A case study demonstrate that the proposed method efficiently estimates the RUL of ultrasonic motors. © 2024 IEEE.

关键词： Piezoelectric motors

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Design of a high-precision current source system for tunable laser driving 5

Design of a high-precision current source system for tunable...

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2023 5th International Conference on Energy, Power and Grid, ICEPG 2023

作者： Gui, Peng Zhao, Chuang Zhao, Lei Liu, Wenyang Chen, Zitian Mu, Cheng Zhang, Yuhuan Beijing Spacecraft China Technology Corporation Beijing100094 China Control Engineering Aerospace Science and Beijing Space Power Conversion Research Center Beijing100094 China

Fiber Bragg Grating (FBG), which is an Optical Fiber Sensor with high sensitivity, light weight, and strong anti-interference ability, can realize the measurement of physical quantities, such as temperature and strain. The sensor network formed by FBG sensors is through wavelength division multiplexing, which greatly reduced the difficulty of sensor wiring. Therefore, FBG sensors are widely used in sensing fields such as aerospace, bridges and tunnels. As a wavelength-modulated Optical Fiber Sensor, FBG's sensing accuracy depends not only on the performance of the laser, but also on the stability of the driving current. In this paper, a high-precision current source system for laser S7500 modulation drive is designed, with a resolution of output current is higher than 2uA. and the laser S7500 is continuously linearly scanned at 20pm intervals in the wavelength range of 1527nm to 1567nm. The wavelength accuracy of the output optical signal is better than 2pm. The test results prove that the system has the advantages of high modulation speed, good stability and high reliability, and can be applied to high-precision FBG sensor networks. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Sensor networks

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Practice of Product Assurance According to Chang ’ e -4 Probe Development Characteristics 12th

Practice of Product Assurance According to Chang ’ e -4 Pro...

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12th International Conference on Signal and Information Processing, Networking and Computers, ICSINC 2024

作者： Fu, Chunling Dong, Yize Yang, Jiadong Beijing Institute of Spacecraft System Engineering Beijing100094 China Institute of Spacecraft Application System Engineering CAST Beijing China Control and Simulation Center Harbin Institute of Technology Harbin150080 China

ISBN: (纸本)9789819649662

Analyze the Chang'e -4 Probe development characteristics, summarize the main methods of product assurance, including risk identification and control, implementation of differentiated quality control focus, and strict load interface safety control. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： product assurance

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High Impedance Arc Fault Modelling in Offshore Oil Platform Power Grid

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International Journal for engineering Modelling 2024年第1期37卷 29-43页

作者： Wu, Yonghu Huang, Cun Dong, Fen Li, Guoxiang Wang, Gaowei Zhang, Sai Zhao, Tong China National Offshore Oil Corporation Limited Beijing100020 China North China University of Technology School of Electrical and Control Engineering Beijing100144 China

In offshore oil platform power grid, high impedance arc fault occurs frequently. The fault characteristics of high-impedance arc information are weak and difficult to detect, which may not cause the protection method to activate. Therefore, it is important to detect and clear the high impedance fault. In the high impedance case, usually, the arc fault occurs. In the research, the arc model was established using the typical Cassie model and the high impedance arc fault characteristics in offshore oil platform power grids were analysed. An improved arc fault detection method using the phase angle difference between zero sequence voltage and zero sequence current was proposed to extract fault characteristics. This method requires limited detection information and high accuracy to solve the problem of small current and voltage changes in high-resistance arc faults. The offshore oil platform power grid and the arc were modelled using electromagnetic transients software PSCAD/EMTDC. The simulation results show that the arc model and fault detection method work well. © 2024, University of Split. All rights reserved.

关键词： Offshore oil well production

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Research on UAV-Based Mars Topography Mapping and 3D Reconstruction System 11th

Research on UAV-Based Mars Topography Mapping and 3D Reconst...

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11th International Conference on Signal and Information Processing, Network and Computers, ICSINC 2023

作者： Chen, Long Zhao, Pin Chen, Huajun Liu, Xintan Beijing Institute of Control Engineering Beijing China North China Institute of Computing Technology Langfang China Beijing Institute of Spacecraft Environment Engineering Beijing China

ISBN: (纸本)9789819721153

The 3D reconstruction technology is of great significance for the research of Martian topography. In this paper, an unmanned aerial vehicle (UAV) based Mars topography mapping and 3D reconstruction system is proposed. In the system, an on-board range-visual-inertial odometry (on-board range-VIO) is applied to solve UAV navigation and flight path planning problems. The pictures of simulated Mars topography are photted. Images are processed and 3D model is reconstructed by applying high-performance computing unit (HPCU). By building an experimental system on the ground and conducting flight simulation and 3D reconstruction experiments, the effectiveness of the system was verified. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Topography

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