Observer-Based Event-Triggered Time-Varying Formation Tracking Control for Multi-Agent Systems With A Non-Autonomous Leader
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摘要: 针对有向拓扑下含非自治领导者的多智能体系统, 提出一种基于未知输入观测器的分布式动态事件触发控制方法, 以解决其时变编队跟踪问题. 首先, 利用智能体间的相对输出信息设计未知输入观测器, 以估计智能体之间的相对状态. 在此基础上, 引入动态事件触发机制来确定控制输入的更新时刻, 从而有效降低控制更新频率. 随后, 设计一种时变编队跟踪控制协议, 使得跟随者仅依赖相对输出信息即可实现对非自治领导者的编队跟踪. 通过构造合适的Lyapunov函数, 严格证明了编队跟踪误差的渐近收敛性. 此外, 借助反证法严格排除了芝诺行为的存在. 最后, 数值仿真结果验证了所提方法的有效性.Abstract: This paper investigates the time-varying formation tracking problem for multi-agent systems under directed topology with a non-autonomous leader. A distributed dynamic event-triggered (DET) control method based on an Unknown Input Observer (UIO) is proposed. First, a UIO is designed using the relative output information among agents to estimate their relative states. On this basis, a Dynamic Event-Triggered Mechanism is introduced to determine the update instants of the control input, thereby effectively reducing the control update frequency. Subsequently, a time-varying formation tracking control protocol is designed, enabling followers to achieve formation tracking of the non-autonomous leader using only relative output information. Rigorous Lyapunov-based analysis proves the asymptotic convergence of the formation tracking. Furthermore, the existence of Zeno behavior is rigorously excluded by utilizing a proof by contradiction. Finally, numerical simulations validate the effectiveness of the proposed method.
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表 1 不同参数组合下的触发次数与收敛时间
Table 1 Triggering times and convergence time under different parameter combinations
参数 事件触发次数 $ \|\delta(t)\|\leq 0.1 $的时间(s) $ \alpha_k $ $ \beta_k $ 1 2 3 4 5 0.20 0.20 1620 849 1673 812 837 19.1410 0.30 0.20 2081 1071 2136 1091 1019 18.4320 0.40 0.20 2559 1306 2513 1317 1336 17.4650 0.20 0.30 4233 2460 3923 2283 2358 15.8590 0.20 0.25 2786 1473 2706 1506 1452 16.9520 -
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