Nonfragile Consensus Strategy for Variable Fractional-Order Multiagent Systems Based on Disturbance Observer

作者：Liping Chen, Chuang Liu, António M. Lopes, Zhiqiang Zhang, YangQuan Chen · 发表于：IEEE Transactions on Control of Network Systems · 年份：2025 · DOI：10.1109/tcns.2025.3527254 · 被引用次数：4 · 研究领域：Advanced Control Systems Design、Advanced Algorithms and Applications、Fuzzy Logic and Control Systems

This paper proposes non-fragile leader-follower consensus control for variable fractional-order multi-agent systems under disturbance generated by an exogenous system. The developed technique is directly applicable to fixed fractional-order and to integer-order multi-agent systems. Firstly, a non-fragile variable fractional-order disturbance observer is introduced, which is able to tolerate a certain degree of parameter uncertainty. Secondly, by employing the disturbance observer, a novel robust non-fragile consensus control scheme is developed, which not only ensures asymptotic stability of the consensus error system, but also accommodates parameter uncertainty in the physical controller's implementation. Thirdly, new sufficient conditions for the desired consensus protocol are derived using linear matrix inequalities (LMIs), as well as graph and Lyapunov theory. Finally, simulation examples are presented to illustrate the validity of the theoretical results. The proposed order-dependent LMI condition is less conservative than existing order-independent alternatives.