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第二十九届中国控制会议

作者： Enrico CANUTO Luca MASSOTTI Andres MOLANO-JIMENEZ Carlos Norberto PEREZ Politecnico di Torino Dipartimento di Automatica e Informatica

Following the launch in Spring 2009 and operations of the GOCE satellite（Gravity field and steady state Ocean Circulation Explorer）,a new mission made bya long-distance（10 km）satellite formation is under study by European Space *** aims at monitoring,during a 6-year mission,Earth’s gravity field fluctuations more or less in the same wavelength band of GOCE（around 100-km Earth surface grid）.As GOCE is the first’truly’drag-free satellite,the envisaged formation is expected to be the first drag-free formation,posing a suite of challenging technology and control problems under study and solution,*** have demonstrated the mission must be *** paper concentrates on a triad of control problems to be solved and coordinated,namely formation,drag-free and attitude,all of them being highly constrained by a long-life low-Earth-orbit mission imposing low propellant mass and therefore electric propulsion,by scarce propulsion throttabilityof electric thrusters and limited electric *** will be presented and how they can be met through Embedded Model Control will be *** simulated results are included.

关键词： Satellite Formation drag-free Attitude Control Low-Earth-orbit Gravimetry

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Low-Frequency Sensitivity to Gravitational Waves for SpaceInterferometers using drag-free control based on Capacitive Sensing

Low-Frequency Sensitivity to Gravitational Waves for SpaceIn...

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中国宇航学会深空探测技术专业委员会第二届学术会议

作者： Antonio Pulido Patón Purple Mountain Observatory Chinese Academy of Sciences 210008

＜正＞During the last four decades drag-free control has become an increasingly important technology for missions aiming to test fundamental physics in space. ASTROD is a relativity mission concept encompassing multi-purposes. Within the main objectives of ASTROD are the measurement of the relativistic parameters （β,γ）, and the solar angular momentum （J2）. with high precision. Another ASTROD objective is the measurement of low frequency gravitational waves complementing the ESA/ NASA mission LISA in the study of strong field black hole physics. The interferometer mirrors utilized to measure path changes have to be kept in an as pure geodetic motion as possible and that will be achieved using drag-free control. A ten-fold improvement in acceleration noise with respect to LISA would allow ASTROD to test relativity to 1ppb. That means ASTROD would achieve an acceleration noise spectral density about 3× 10-16 ms-2Hz-1/2.

关键词： drag-free gravitational waves space detectors.

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基于drag-free的重力场测量卫星动力学与控制研究

基于Drag-Free的重力场测量卫星动力学与控制研究

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作者：施梨哈尔滨工业大学

学位级别：硕士

利用卫星对重力场进行测量是重力场测量发展到现代的一个标志。而drag-free控制能够消除卫星的阻力,可以满足重力场测量对极低干扰环境的要求,是重力场测量卫星中的一项关键技术。提出并分析了基于drag-free重力场测量卫星的体系结构,... 详细信息

利用卫星对重力场进行测量是重力场测量发展到现代的一个标志。而drag-free控制能够消除卫星的阻力,可以满足重力场测量对极低干扰环境的要求,是重力场测量卫星中的一项关键技术。提出并分析了基于drag-free重力场测量卫星的体系结构,建立了drag-free卫星的动力学模型,并分析其特性,基于H∞理论设计了drag-free卫星的控制器。本文主要工作包括以下几个方面:首先,在比较drag-free加速度计和位移两种模式特点和适用范围的基础上,提出基于drag-free加速度计和位移混合模式的重力场测量卫星体系结构。分析该体系结构下drag-free控制回路、质量块控制回路和卫星本体姿态控制回路的组成和实现原理。并研究支持drag-free技术的敏感器、执行机构和放电装置等多种部件的实现原理。其次,建立drag-free卫星的卫星本体和质量块的动力学模型,以及两者之间的相对运动动力学模型。基于drag-free卫星运行的特点,对卫星本体和质量块相对运动动力学模型和卫星本体姿态动力学模型进行合理简化。通过仿真分析简化对动力学模型精度的影响。并建立卫星本体和质量块受到的各种干扰力和干扰力矩模型。最后,研究将H∞设计理论与回路成形设计方法相结合的原理,分析基于H∞设计与回路成形设计相结合的H∞多灵敏度设计方法的特点、适用范围和设计过程。基于H∞控制系统设计理论对drag-free卫星控制器进行设计。将设计得到的控制器与建立的动力学模型组合起来,形成闭环回路,进行仿真验证。

关键词： drag-free 重力场测量卫星 H_∞控制理论耦合

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A review on DFACS(II):Modeling and analysis of disturbances and noises

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Chinese Journal of Aeronautics 2024年第5期37卷 120-147页

作者： Chenglei YUE Bohan JIAO Zhaohui DANG Xiaokui YUE Yonghe ZHANG Yuanqing XIA Li DUAN Qinglei HU Qifan LIU Pengcheng WANG Ming GUO Zhansheng DUAN Bing CUI Chu ZHANG Xiaodong SHAO School of Astronautics Northwestern Polytechnical UniversityXi’an 710072China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 710699China School of Automation Beijing Institute of TechnologyBeijing 100081China Institute of Mechanics Chinese Academy of SciencesBeijing 710043China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China School of Automation Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China

This paper presents Part II of a review on DFACS,which specifically focuses on the modeling and analysis of disturbances and noises in *** Part I,the system composition and dynamics model of the DFACS were *** this paper,we discuss the effects of disturbance forces and noises on the system,and summarize various analysis and modeling methods for these interferences,including the integral method,frequency domain analysis method,and magnitude evaluation *** analyzing the impact of disturbances and noises on the system,the paper also summarizes the system’s performance under slight ***,we highlight current research difficulties in the field of DFACS noise ***,this paper provides valuable insights into the modeling and analysis of disturbances and noises in DFACSs,and identifies key areas for future research.

关键词： drag-free DFACS Disturbance Analysis Noise Analysis Frequency Domain Analysis Performance Evaluation

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A review on DFACS(I):System design and dynamics modeling

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Chinese Journal of Aeronautics 2024年第5期37卷 92-119页

作者： Bohan JIAO Qifan LIU Zhaohui DANG Xiaokui YUE Yonghe ZHANG Yuanqing XIA Li DUAN Qinglei HU Chenglei YUE Pengcheng WANG Ming GUO Zhansheng DUAN Bing CUI Chu ZHANG Xiaodong SHAO School of Astronautics Northwestern Polytechnical UniversityXi’an 710072China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 710699China School of Automation Beijing Institute of TechnologyBeijing 100081China Institute of Mechanics Chinese Academy of SciencesBeijing 710043China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China School of Automation Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China

The drag-free and Attitude Control System(DFACS)is a critical platform for various space missions,including high precision satellite navigation,geoscience and gravity field measurement,and space scientific *** paper presents a comprehensive review of over sixty years of research on the design and dynamics model of ***,we examine the open literature on DFACS and its applications in drag-free missions,providing readers with necessary background information on the ***,we analyze the system configurations and main characteristics of different DFACSs,paying particular attention to the coupling mechanism between the system configuration and dynamics ***,we summarize the dynamics modeling methods and main dynamics models of DFACS from multiple perspectives,including common fundamentals and specific ***,we identify current challenges and technological difficulties in the system design and dynamics modeling of DFACS,while suggesting potential avenues for future *** paper aims to provide readers with a comprehensive understanding of the state-of-the-art in DFACS research,as well as the future prospects and challenges in this field.

关键词： drag-free DFACS System Design Dynamics Modeling Control design

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