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Time-varying state-space model identification of an on-orbit rigid-flexible coupling spacecraft using an improved predictor-based recursive subspace algorithm
Ni ZY(倪智宇)1; Liu JG(刘金国)2; Wu SN(邬树楠)3; Wu ZG(吴志刚)3
Department空间自动化技术研究室
Source PublicationActa Astronautica
ISSN0094-5765
2018
Indexed ByEI
EI Accession number20184706116265
Contribution Rank2
Funding OrganizationNational Natural Science Foundation of China (11502040, 51775541) ; Key Program of the Chinese Academy of Sciences (Y4A3210301) ; Postdoctoral Science Foundation of China (2016M601354)
KeywordParameter identification State-space model Recursive subspace method Time-varying system Affine projection sign algorithm State estimation
AbstractSpacecraft control problems frequently require the latest model parameters to provide timely updates to the controller parameters. This study investigates the recursive identification problem in a the time-varying state-space model of an on-orbit rigid-flexible coupling spacecraft. An improved recursive predictor-based subspace identification (RPBSID) method is presented to increase on-orbit identification efficiency. Compared with the classical RPBSID and other subspace methods, the improved RPBSID applies the affine projection sign algorithm. Accordingly, the system state variables can be determined directly via recursive computation. Thus, the proposed algorithm does not require constructing the corresponding Hankel matrix or implementing singular value decomposition (SVD) at each time instant. Consequently, the amount of data used in the identification process is reduced, and the computational complexity of the original method is decreased. The time-varying state-space model of the spacecraft is estimated through numerical simulations using the classical RPBSID, improved RPBSID, and SVD-based approaches. The computational efficiency and accuracy of the three methods are compared for different system orders. Computed results of the test response demonstrate that the improved RPBSID algorithm not only achieves sufficient identification accuracy but also exhibits better computational efficiency than the classical methods in identifying the parameters of the spacecraft time-varying state-space model.
Language英语
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/23584
Collection空间自动化技术研究室
Corresponding AuthorLiu JG(刘金国)
Affiliation1.College of Aerospace Engineering, Shenyang Aerospace University, Shenyang, China
2.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China
3.School of Aeronautics and Astronautics, Dalian University of Technology, Dalian, China
Recommended Citation
GB/T 7714
Ni ZY,Liu JG,Wu SN,et al. Time-varying state-space model identification of an on-orbit rigid-flexible coupling spacecraft using an improved predictor-based recursive subspace algorithm[J]. Acta Astronautica,2018.
APA Ni ZY,Liu JG,Wu SN,&Wu ZG.(2018).Time-varying state-space model identification of an on-orbit rigid-flexible coupling spacecraft using an improved predictor-based recursive subspace algorithm.Acta Astronautica.
MLA Ni ZY,et al."Time-varying state-space model identification of an on-orbit rigid-flexible coupling spacecraft using an improved predictor-based recursive subspace algorithm".Acta Astronautica (2018).
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