| 引用本文: | 郝立维,张锦绣,王继河,等.地心轨道引力波探测无拖曳系统平动控制策略.[J].国防科技大学学报,2024,46(2):36-48.[点击复制] |
| HAO Liwei,ZHANG Jinxiu,WANG Jihe,et al.Translational tracking strategy of drag-free system for gravitational wave detection in geocentric orbit[J].Journal of National University of Defense Technology,2024,46(2):36-48[点击复制] |
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| 地心轨道引力波探测无拖曳系统平动控制策略 |
| 郝立维1,张锦绣2,王继河2,张谕3,孙玥4,5 |
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(1. 哈尔滨工业大学 卫星技术研究所, 黑龙江 哈尔滨 150001;2. 中山大学 航空航天学院, 广东 深圳 518107;3. 中山大学 天琴中心, 广东 珠海 519082;4. 上海市空间智能控制技术重点实验室, 上海 201109;5. 上海航天控制技术研究所, 上海 201109)
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| 摘要: |
| 探讨了一种针对空间引力波探测任务的在轨无拖曳控制技术,基于未来可行的地心轨道探测任务背景进行分析设计,并对搭载两颗检验质量的在轨无拖曳系统进行航天器与质量块间相对运动动力学及耦合特性建模。同时,初步分析了任务中无拖曳系统指标和摄动,并设计了基于频域H∞最优控制理论的系统相对平动控制律。数值仿真结果表明,当双检验质量在轨无拖曳系统各检验质量按激光测距呼吸角排列时,采用无固定追踪点策略且在非敏感轴无悬浮控制输入的情况下,可以实现航天器对基准点的追踪,并满足系统频域性能指标的要求。同时,每颗检验质量的时域偏移量可以控制在微米级别,从而获得任务所需的纯引力基准。 |
| 关键词: 空间引力波探测 无拖曳控制 双检验质量 H∞控制 |
| DOI：10.11887/j.cn.202402004 |
| 投稿日期：2022-07-28 |
| 基金项目:广东省基础与应用基础研究重大资助项目(2019B030302001) |
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| Translational tracking strategy of drag-free system for gravitational wave detection in geocentric orbit |
| HAO Liwei1, ZHANG Jinxiu2, WANG Jihe2, ZHANG Yu3, SUN Yue4,5 |
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(1. Research Center of Satellite Technology, Harbin Institute of Technology, Harbin 150001, China;2. School of Aeronautics and Astronautics, Sun Yat-Sen University, Shenzhen 518107, China;3. TianQin Research Center, Sun Yat-Sen University, Zhuhai 519082, China;4. Shanghai Key laboratory of Aerospace Intelligent Control Technology, Shanghai 201109, China;5. Shanghai Institute of Spaceflight Control Technology, Shanghai 201109, China)
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| Abstract: |
| An on-orbit drag-free control technique for spaceborne gravitational wave detection missions was discussed. Based on the analysis and design of a possible future geocentric orbit detection mission, the relative motion dynamics and coupling characteristics between the spacecraft and mass blocks of an on-orbit drag-free system with with two test masses were modeled. At the same time, the performance index and perturbation of the drag-free system in the mission were preliminarily analyzed, and a relative translational control law based on frequency domain H∞ optimal control theory was designed. Numerical simulation results show that when the test masses of the two-test-mass on-orbit drag-free system are arranged according to the breathing angle of laser rangefinder, without a fixed tracking point strategy and without suspension control input along the non-sensitive axis, the spacecraft can achieve tracking of the reference point while meeting the frequency domain performance index of the system. At the same time, the time domain displacement of each test mass can be controlled to the micron level, thus obtaining the pure gravitational reference required by the mission. |
| Keywords: spaceborne gravitational wave detection drag-free control two-test-mass H∞ theory |
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