Dynamic Powers-Based Nonsingular Practical Fixed-Time Tracking Control for Rigid Spacecraft via Modified Rodrigues Parameters

• 成果类型: Article
• 署名作者: Dong, Rui-Qi; Wu, Ai-Guo; Qi, Wen-Nian; Zou, Yao; Li, Bing
• 署名单位: Harbin Institute of Technology; Jimei University; University of Science & Technology Beijing
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2026.3652930
• 发表日期: 2026
• 关键词: SLIDING-MODE CONTROL; FLEXIBLE SPACECRAFT; attitude; STABILITY; DESIGN

摘要

In this article, the fixed-time attitude tracking control for spacecraft is investigated. By introducing dynamic powers, a novel terminal sliding function and a novel nonsingular practical fixed-time tracking control law are developed. In particular, the dynamic powers in the proposed sliding function is constructed via the modified Rodrigues parameters (MRPs) and control law is designed by using the sliding mode variable. An important feature of the proposed dynamic powers-based sliding function is that it does not introduce negative powers into the control law. Moreover, it is proven that the attitude tracking error converges into a small adjustable neighborhood of the origin in a fixed time. Finally, a numerical simulation is conducted to verify the proposed theoretical results.