论文标题

航天器态度态度指向指向禁止限制的控制,并保证准确性

Spacecraft Attitude Pointing Control under Pointing Forbidden Constraints with Guaranteed Accuracy

论文作者

Lei, Jiakun, Meng, Tao, Wang, Weijia, Sun, Shujian, Li, Heng, Jin, Zhonghe

论文摘要

本文重点介绍了指向指向控制问题和绩效限制下的态度指向控制问题。预计该航天器将其传感器的镜头与所需的方向保持一致,而终端控制精度和态度调整速度也应同时保证。为了解决此问题,在本文中提出了基于降低的态度表示形式,将切换控制器结构融合在一起,从而将人工电位领域(APF)方法和规定的性能控制(PPC)方案融合在一起。首先,提出了一个新颖的人造电位字段,并设计了特定的功能,用于转换开关过程,旨在为系统状态提供平稳的过渡。随后,我们提出了一个特殊的性能函数,可以在必要时冻结PPC部分。这样,解决了快速的态度操纵和禁止方向避免的固有矛盾 此外,设计了异步切换策略,可以确保系统的稳定性。基于这些提议的问题,开发了切换后替台控制器,并采用跟踪区分(TD)来生成差分信号的平滑近似。说明了数值模拟结果以显示所提出的方案的有效性。

This paper focuses on the attitude pointing control problem under pointing-forbidden constraints and performance constraints. The spacecraft is expected to align its sensor's boresight to a desired direction, while the terminal control accuracy and the attitude adjustment rapidity should also be guaranteed simultaneously. To resolve this problem, a switching controller structure is proposed in this paper based on the reduced-attitude representation, fusing the artificial potential field (APF) methodology and the Prescribed Performance Control (PPC) scheme together. Firstly, a novel artificial potential field is presented, and a particular function is designed for the mollification of the switching process, aiming at providing a smooth transition for the system status. Subsequently, we propose a special performance function, which can freeze the PPC part when necessary. In this way, the intrinsic contradictory between the fast attitude maneuver and forbidden direction avoidance is tackled Further, an asynchronous switching strategy is designed, guarantees the system's stability. Based on these proposed issues, a switching backstepping controller is developed, and a tracking differentiator(TD) is employed to generate a smooth approximation of differential signals. Numerical simulation results are illustrated to show the effectiveness of the proposed scheme.

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