Neural-Network-Based Event-Triggered Adaptive Control of Nonaffine Nonlinear Multiagent Systems With Dynamic Uncertainties

Hongjing Liang, Guangliang Liu, Huaguang Zhang, Tingwen Huang

IEEE Transactions on Neural Networks and Learning Systems · 2020 · 507 citations · 36 references

Concepts

TL;DR

The study develops an adaptive event‑triggered neural control strategy for nonaffine pure‑feedback nonlinear multiagent systems with dynamic disturbances, unmodeled dynamics, and dead‑zone inputs, aiming to reduce communication load via a varying‑threshold trigger. Using radial basis function neural networks to approximate unknown nonlinearities, a dynamic signal to handle unmodeled dynamics, and a Lyapunov‑based adaptive control design, the authors construct an event‑triggered protocol that guarantees bounded signals and follower convergence to a neighborhood of the leader. The proposed protocol ensures that all follower outputs converge to a neighborhood of the leader’s output while keeping all closed‑loop signals bounded.

Abstract

This article addresses the adaptive event-triggered neural control problem for nonaffine pure-feedback nonlinear multiagent systems with dynamic disturbance, unmodeled dynamics, and dead-zone input. Radial basis function neural networks are applied to approximate the unknown nonlinear function. A dynamic signal is constructed to deal with the design difficulties in the unmodeled dynamics. Moreover, to reduce the communication burden, we propose an event-triggered strategy with a varying threshold. Based on the Lyapunov function method and adaptive neural control approach, a novel event-triggered control protocol is constructed, which realizes that the outputs of all followers converge to a neighborhood of the leader's output and ensures that all signals are bounded in the closed-loop system. An illustrative simulation example is applied to verify the usefulness of the proposed algorithms.

References

36