航天器姿态控制的鲁棒模式切换

中文摘要 AI 辅助

本文提出了一种用于航天器任务中两种模式之间联合控制和平滑切换的单一线性参数变化（LPV）控制器的设计方法。当前工业界在不同控制器模式之间进行切换的实践是采用离散切换方法。当满足预定标准时，一种模式的控制器被关闭，另一种模式的控制器被初始化，这导致了不期望的瞬态行为。此外，每个控制器必须单独经历严格的验证与确认（V&V）过程。使用LPV方法合成的单一控制器简化了V&V过程并改善了瞬态行为。所提出的设计遵循混合灵敏度控制方案，其LPV权重源自各个模式的性能和鲁棒性要求。该控制器通过最小化控制器与加权对象之间闭环互连的诱导$\mathcal{L}_2$范数来合成。通过蒙特卡洛活动在柔性卫星的采集和指向任务中展示了控制器的性能和鲁棒性。

英文摘要

This paper proposes the design of a single linear parameter-varying (LPV) controller for the combined control and smooth transition between two modes in a spacecraft mission. Current industry practice for transitioning between different controller modes is to use a discrete switching approach. When predefined criteria are satisfied, the controller of one mode is turned off and the controller of the other is initialised, resulting in an undesirable transient behaviour. In addition, each controller must individually undergo a rigorous verification and validation (V&V) process. A single controller synthesised using LPV methods streamlines the V&V process and improves the transient behaviour. The proposed design follows a mixed-sensitivity control scheme with LPV weights that are derived from the performance and robustness requirements of the individual modes. The controller is synthesised by minimising the induced $\mathcal{L}_2$-norm of the closed-loop interconnections between the controller and weighted plant. The performance and robustness of the controller is demonstrated on an acquisition and pointing task of a flexible satellite through a Monte-Carlo campaign.

发表机构

• Aurora Technology for ESA-ESTEC（欧空局技术研究所）

机构由 AI 辅助整理，请以论文原文为准。