Observer‐based hybrid synchronization control of multiagent systems under dynamic need‐based communication policies

• Published in: International journal of robust and nonlinear control Vol. 32; no. 3; pp. 1526 - 1544
• Main Authors: Xu, Yong, Liu, Jian
• Format: Journal Article
• Language: English
• Published: Bognor Regis Wiley Subscription Services, Inc 01.02.2022
• Subjects: Algorithms; Communication; Control systems; dynamic output feedback control; Graph theory; Multiagent systems; multi‐agent systems (MASs); nonlinear event‐triggered control; Policies; Synchronism; synchronization; Tracking control
• ISSN: 1049-8923; 1099-1239
• DOI: 10.1002/rnc.5900

This article focuses on the problem of observer‐based synchronization control of multi‐agent systems (MASs) subject to chattering phenomenon. Considering that full states of agents are not available and the limited network bandwidth of MAS networks exists, a novel observer‐based hybrid event‐triggered communication (or called need‐based communication) policy is exploited for synchronization of MASs, which is implemented in a fully distributed fashion without requiring any prior knowledge of global network parameters over an undirected graph. Then, to release the limitation of applications for the synchronous algorithm in undirected graphs, an observer‐based hybrid event‐triggered leader‐follower protocol and corresponding to its static triggering policy are developed to study the tracking control problem in a directed graph. Besides, the dynamic triggering policy is proposed by introducing an extra key variable for the directed graph case to reduce considerable triggering instants compared with the static one, which also subsume several existing synchronization schemes as special cases. It is shown that the proposed observer‐based event‐triggered policies can guarantee that leaderless and leader‐following synchronization with intermitted communications among agents. Moreover, Zeno behavior can be excluded. Finally, the practical merits of the proposed methods are corroborated using two numerical examples.