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Development of the Moving Horizon Estimator with Pre-Estimation (MHE-PE). Application to Space Debris Tracking during the Re-Entries.

Abstract : Space debris tracking during atmospheric re-entries will be a crucial challenge in the coming years, emphasized through many projects on space debris mitigation established by space agencies worldwide. However, this problem appears to be complex, due to model errors and difficulties to properly initialize the estimation algorithms, as a result of unknown dynamics of the debris and their disintegrations during the re-entries. A-to-be used estimator for this problem must be robust against these factors. The Moving Horizon Estimator (MHE) is known in the literature to be robust to model errors and bad initialization, and the PhD work has proved its ability to satisfy performances required by the debris tracking during the re-entries. However, its optimization-based framework induces a large computation time. To overcome this, a new MHE structure which requires smaller computation time than the classical MHE has been developed. This strategy, so-called “Moving Horizon Estimator with Pre-Estimation (MHE-PE)” takes into account model errors by using an auxiliary estimator rather than by searching for estimates of the process noise sequence over the horizon as in the classical strategy. A theorem which guarantees the stability of the dynamics of the estimation errors of the MHE-PE has also been proposed. Finally, performances of this structure in the context of 3D space debris tracking during the re-entries have been shown to be better than those obtained with classical estimators including the MHE. In particular, without degrading accuracy of the estimates and convergence of the estimator, the MHE-PE estimator requires smaller computation time than the MHE thanks to its small number of optimization variables.
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Submitted on : Monday, May 2, 2016 - 7:00:20 PM
Last modification on : Tuesday, March 16, 2021 - 3:44:42 PM
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  • HAL Id : tel-01154719, version 2



Rata Suwantong. Development of the Moving Horizon Estimator with Pre-Estimation (MHE-PE). Application to Space Debris Tracking during the Re-Entries.. Automatic. Supélec, 2014. English. ⟨NNT : ⟩. ⟨tel-01154719v2⟩



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