Decentralized Model Reference Adaptive Control for Systems With Time Delays and Dead Zones

• 成果类型: Article
• 署名作者: Zhang, Zhengqiang; Yang, Chen; Chen, Xinkai
• 署名单位: Qufu Normal University; Shibaura Institute of Technology
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2022.3206249
• 发表日期: 2023
• 页码: 4367-4374
• 关键词: Dead zone; decentralized adaptive control; model reference adaptive control (MRAC); time delay

摘要

The decentralized robust model reference adaptive control (MRAC) problem is studied for a class of large-scale systems with unknown plant parameters, unknown time-varying delayed interconnections, and unknown dead-zone inputs. Two robust adaptive control schemes are proposed for the cases of symmetric dead-zone input and asymmetric dead-zone input under the assumption of moderate time-delay nonlinearity and the matching conditions of the plant model and the reference model matrix, respectively. The control gain function is explicitly expressed, and its useful properties are established. The Lyapunov-Krasovskii functional with two integral functions is constructed. It is shown that all signals in the closed-loop system are bounded and the state tracking error converges exponentially to a tunable region. The effectiveness and feasibility of the proposed design approach is illustrated by a simulation example.