Event-triggered synchronization control of networked Euler-Lagrange systems without requiring relative velocity information.

• By comprehensively taking into account the currently detailed system characteristics and behaviors of more generally nonlinear networked Euler-Lagrange systems with uncertainties and disturbances, this paper develops corresponding event-triggered control algorithms for tackling single- and multi-synchronization control problems to alleviate execution burden, where the categorization of synchronization control problems can further promote the behavior research of systems in a solid manner. • The developed event-triggered control algorithms relax the restrictive requirement of relative velocity information, which can not only significantly alleviate the communication and computation burden but also guarantee satisfactory convergence performances. • This paper further investigates the performance comparisons with other control algorithms by conceiving a performance index named trigger rate, i.e., the specific value of average and total trigger numbers. This paper investigates the single- and multi-synchronization control problems of networked Euler-Lagrange systems subject to parameter uncertainties, time-varying disturbances and scarce control resources in a unified framework. Several novel event-triggered control algorithms are developed without requiring relative velocity information, which is capable of significantly mitigating the cost of unnecessary controller updates, signal transmission and computation, while possessing satisfactory control performances. Additionally, based on the Lyapunov stability techniques, the rigorous sufficient criteria for the asymptotic convergence of the synchronization errors are established, and the positive lower bounds of execution intervals are derived to exclude Zeno behaviors. Finally, by further proposing other comparative control algorithms and conceiving a performance index named trigger rate, numerical examples are performed to demonstrate the effectiveness and superiority of the theoretical results. [ABSTRACT FROM AUTHOR]