大型挠性航天器最坏指向性能分析
Worst-Case Pointing Performance Analysis for Large Flexible Spacecraft
摘要：
本文介绍了一个工具，PELIB，在MATLAB /SIMULINK环境下开发的欧洲指向标准的基础上进行指向性能分析。PELIB是卫星动力学模型（SDT）的扩展，SDT推导了挠性空间结构的线性分式变换（LFT）模型。PELIB的增加将允许SDT的用户在用于控制综合的相同环境中对真实任务场景进行指向性能分析。PELIB还提供了考虑系统不确定性的可能性。这一功能通过提供最坏情况指向预算，增强了欧洲航天工业界现有的核查工具。在一个涉及带有两个柔性太阳能电池阵列的航天器模型的案例研究中，展示了PELIB的能力。该模型考虑了多种误差源和不确定参数。使用PELIB研究了标称性能，并与当前欧洲参考工具进行了比较。利用PELIB的新特性对最坏情况下的性能进行了研究，得到了最坏情况下的性能预算
英文摘要：
This paper presents a tool, PELIB, developed in MATLAB /SIMULINK environment to perform pointing performance analysis based on European pointing standards. PELIB is designed as an extension of the Satellite Dynamics Toolbox (SDT), which derives the Linear Fractional Transformation (LFT) models of flexible space structures. The addition of PELIB will allow the users of SDT to perform pointing performance analysis of real mission scenarios in the same environment used for control synthesis. PELIB offers as well the possibility to take into account uncertainties in the system. This feature represents an enhancement to the current verification tools available in the European space industry community by providing the worst-case pointing budget. The capabilities of PELIB were demonstrated in a case study involving a spacecraft model with two flexible solar arrays. Several error sources, as well as uncertain parameters, were included in this model. The nominal performance has been investigated using PELIB and compared with the current European reference tool. The worst-case performance is also investigated with the new feature of PELIB to obtain the worst-case performance budget
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