On-Orbit Identification of Unstable Micro-Propulsion System Parameters Using Drag-Free Control
Space gravitational wave detection spacecraft is equipped with a drag-free control and micro-propulsion system, and adopts thrust closed-loop feedback control structure. An on-orbit high accuracy estimation algorithm of micro-thruster parameters based on drag-free control model is proposed in this p...
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| Vydáno v: | Data Driven Control and Learning Systems Conference (Online) s. 1935 - 1940 |
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17.05.2024
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| ISSN: | 2767-9861 |
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| Abstract | Space gravitational wave detection spacecraft is equipped with a drag-free control and micro-propulsion system, and adopts thrust closed-loop feedback control structure. An on-orbit high accuracy estimation algorithm of micro-thruster parameters based on drag-free control model is proposed in this paper in order to deal with the problem of unsteady nominal thrust caused by thruster failure or aging and and extend thrusters lifespan. In this method, the recursive gain and covariance are designed to estimate the parameter matrix of system. Adaptive forgetting factors are added to the covariance matrix for designing a fading memory window to determine the influence of prior data on the results. At the same time, the thruster state is deconstructed into three parts: thrust gain, thrust direction and lever arm to facilitate the redistribution of control force and torque. Simulations show that the on-orbit thrust identification errors of the proposed method in different micro-propulsion states are all at sub-micro-newton level, and the noise is less than 0.1\mu N/\sqrt{Hz} which has capability to meet the requirements corresponding to drag-free control system. |
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| AbstractList | Space gravitational wave detection spacecraft is equipped with a drag-free control and micro-propulsion system, and adopts thrust closed-loop feedback control structure. An on-orbit high accuracy estimation algorithm of micro-thruster parameters based on drag-free control model is proposed in this paper in order to deal with the problem of unsteady nominal thrust caused by thruster failure or aging and and extend thrusters lifespan. In this method, the recursive gain and covariance are designed to estimate the parameter matrix of system. Adaptive forgetting factors are added to the covariance matrix for designing a fading memory window to determine the influence of prior data on the results. At the same time, the thruster state is deconstructed into three parts: thrust gain, thrust direction and lever arm to facilitate the redistribution of control force and torque. Simulations show that the on-orbit thrust identification errors of the proposed method in different micro-propulsion states are all at sub-micro-newton level, and the noise is less than 0.1\mu N/\sqrt{Hz} which has capability to meet the requirements corresponding to drag-free control system. |
| Author | Xu, Nuo Li, Zhaoxiong Xia, Xiwang Zhang, Yonghe He, Xiongfeng Guo, Ning Wang, Pengcheng |
| Author_xml | – sequence: 1 givenname: Nuo surname: Xu fullname: Xu, Nuo email: xunuobit@163.com organization: Chinese Academy of Sciences,Innovation Academy for Microsatellites,Shanghai,P. R. China,201203 – sequence: 2 givenname: Xiwang surname: Xia fullname: Xia, Xiwang email: x_xiwang@163.com organization: Chinese Academy of Sciences,Innovation Academy for Microsatellites,Shanghai,P. R. China,201203 – sequence: 3 givenname: Zhaoxiong surname: Li fullname: Li, Zhaoxiong email: zhangyh@microsate.com organization: Chinese Academy of Sciences,Innovation Academy for Microsatellites,Shanghai,P. R. China,201203 – sequence: 4 givenname: Xiongfeng surname: He fullname: He, Xiongfeng organization: Chinese Academy of Sciences,Innovation Academy for Microsatellites,Shanghai,P. R. China,201203 – sequence: 5 givenname: Ning surname: Guo fullname: Guo, Ning organization: Lanzhou Institute of Physics,Science and Technology on Vacuum Technology and Physics Lab,Lanzhou,P. R. China,730000 – sequence: 6 givenname: Pengcheng surname: Wang fullname: Wang, Pengcheng organization: Chinese Academy of Sciences,Innovation Academy for Microsatellites,Shanghai,P. R. China,201203 – sequence: 7 givenname: Yonghe surname: Zhang fullname: Zhang, Yonghe organization: Chinese Academy of Sciences,Innovation Academy for Microsatellites,Shanghai,P. R. China,201203 |
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| Snippet | Space gravitational wave detection spacecraft is equipped with a drag-free control and micro-propulsion system, and adopts thrust closed-loop feedback control... |
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| StartPage | 1935 |
| SubjectTerms | Accuracy Attitude control Drag-free Control Fading channels Gravitational Waves Heuristic algorithms Micro-propulsion Recursive Least Square Simulation Space vehicles Thrust Identification Torque |
| Title | On-Orbit Identification of Unstable Micro-Propulsion System Parameters Using Drag-Free Control |
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