As the foundation of collaborative control between MASs, the problem of consensus has attracted the eyes of more and more relevant scholars and has become a vital research topic in the development of frontier theories of control disciplines. According to the remarkable feature of saving communication resource, event-triggered consensus control has been widely studied. This paper gives some researched event-triggered consensus controllers with different dynamics, and the corresponding trigger conditions. Then, through systematic analysis of the design of these consensus control methods, the idea of event-based consensus controller and the corresponding triggering conditions are revealed. Furthermore, consensus stability and Zeno behavior elimination methods are analyzed. Finally, some issues in the research of event-triggered control and show some hot and promising research topics are pointed out to be solved in the future.
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