Adaptive Control of Noncanonical Nonlinear Systems With Time-Varying Dynamics

• 成果类型: Article
• 署名作者: Wen, Liyan; Jiang, Bin; Chen, Mou; Ma, Yajie
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2023.3270389
• 发表日期: 2024
• 页码: 590-597
• 关键词: Time-varying systems; Adaptive control; nonlinear dynamical systems; aircraft; Adaptation models; system dynamics; Linear systems; noncanonical nonlinear system; output tracking; Parameter Estimation; time-varying dynamics

摘要

In this article, adaptive control designs are systematically studied for uncertain noncanonical nonlinear systems with time-varying dynamics. As a key system characterization, the relative degrees are directly defined for noncanonical nonlinear time-varying systems, and at the same time, the necessary time-varying parameter conditions are specifically derived for different system dynamics. Then, robust adaptive feedback linearization-based control designs are studied for noncanonical nonlinear systems with time-varying dynamics under different relative degree conditions. The designs ensure that all closed-loop system signals are bounded and the output tracking error is small in the mean. Simulation studies are presented for a time-varying noncanonical nonlinear aircraft model to show the effectiveness of the developed adaptive control schemes.