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首页> 外文期刊>Mechanical systems and signal processing >Integrated modeling of microvibrations induced by Solar Array Drive Mechanism for worst-case end-to-end analysis and robust disturbance estimation
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Integrated modeling of microvibrations induced by Solar Array Drive Mechanism for worst-case end-to-end analysis and robust disturbance estimation

机译:太阳能阵列驱动机构综合建模,用于最坏情况结束分析和鲁棒干扰估计

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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 taking into account all the uncertainties of each sub-system. A particular focus is dedicated to a novel generic model for Solar Array Drive Mechanism 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.
机译:现代和未来的观察空间任务面临越来越苛刻的表现要求。这伴随着更大的轻质灵活结构的开发。本文概述了一种在两输入的两输出端口框架内以端到端时尚在端到端时尚中建模通用多体柔性航天器的方法:通过考虑每个不确定性的所有不确定性,从干扰一直指向性能子系统。特定的焦点专用于用于太阳能阵列驱动机构的新型通用模型及其微步骤驱动器和齿轮箱缺陷产生的谐波干扰。拟议的模型用欧洲航天器的车载遥控仪验证。此外,本文显示了如何拟议的基于模型的方法,可以轻松地用于控制设计和闭环稳健性能分析。研究了机械参数组合的最坏情况,以提供参考研究案例的强大性能证书。最终提出了由太阳能阵列转子角度调度的线性参数变化观察者,以估计齿轮箱缺陷诱导的干扰扭矩,只需使用来自经典姿态控制系统的测量:星形跟踪器和谐波。

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