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arXiv 2105.03392eess.SYcs.SY
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用于最坏情况端到端分析和鲁棒干扰估计的太阳能电池阵驱动机构引起的微振动的集成建模

Integrated modelling of microvibrations induced by Solar Array Drive Mechanism for worst-case end-to-end analysis and robust disturbance estimation

Francesco Sanfedino, Daniel Alazard, Valentin Preda, Davide Oddenino

摘要:

现代和未来的观测空间任务面临着越来越苛刻的指向性能要求。这是伴随着更大的轻质柔性结构的发展。本文概述了一种通用的多体柔性航天器的建模方法,在一个端到端的方式内的两个输入两个输出端口的框架:从干扰所有的方式指向性能考虑到所有的不确定性,每个子系统。一个特别的重点是致力于一个新的通用模型的太阳能驱动器阵列机构及其谐波干扰所产生的微步进驱动器和齿轮箱的缺陷。所提出的模型与欧洲航天器上的遥测验证。此外,本文还展示了所提出的基于模型的方法可以很容易地用于控制设计和闭环鲁棒性能分析。研究了机械参数组合的最差情况,以提供参考研究案例的稳健性能证书。最后,提出了一种线性变参数观测器,由太阳能电池阵列的转子角度调度,以估计齿轮箱的缺陷引起的干扰力矩,只使用来自一个经典的姿态控制系统的测量:一个星跟踪器和陀螺仪。

英文摘要:

Modern and future observation Space missions face increasingly more demanding pointing performance requirements. This is accompanied with the development of larger lightweight flexible structures. This paper outlines a methodology for modeling a generic multi-body flexible spacecraft in an end-to-end fashion within the Two-Inputs Two-Outputs Port framework: from disturbance all the way to pointing performance by tacking into account all the uncertainties of each sub-system. A particular focus is dedicated to a novel generic model for Solar Drive Array Mechanisms and its harmonic disturbances produced by the micro-stepping driver and the gearbox imperfections. The proposed model is validated with the on-board telemetries of a European spacecraft. Moreover this paper shows how the proposed model-based approach can be easily used for control design and closed-loop robust performance analysis. Worst-case scenarios of mechanical parameters combination are investigated to provide robust performance certificate of the reference study case. A Linear Parameter-Varying observer, scheduled by the solar array rotor angle, is finally proposed in order to estimate the disturbance torques induced by the gearbox imperfections just using the measurements coming from a classical attitude control system: a star tracker and a gyrometer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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