Passivity-Based Pinning Synchronization Control of Switched Directed Networks With Improved Switching Strategy
研究了采样数据事件触发通信下切换有向网络的无源性牵制同步问题，提出改进的状态依赖切换策略和松弛无源性分析框架，使同步误差系统保持无源性并在无外部输入时实现渐近同步，同步判据与节点数无关，适用于大规模网络，并通过图像加密解密实例验证了有效性。
This research delves into the passivity-based pinning synchronization problem for switched directed networks (SDNs) within the context of a sampled-data-based event-triggered (SDET) communication environment. An improved state-dependent switching strategy (SDSS) using sampled measurements alongside a novel time-dependent Lyapunov-Krasovskii functional (LKF) approach is constructed. Subsequently, a relaxed passivity analysis framework is then presented, ensuring that the resultant synchronization error system (SES) remains passive, and that the examined SDNs achieve asymptotic synchronization in the absence of external inputs. Unlike conventional strategies, the proposed switching protocol depends exclusively on system states at discrete sampling instants and effectively utilizes historical state data, yielding a less conservative theoretical framework for passivity synthesis in SDNs. Furthermore, the resulting synchronization criterion is independent of the number of network nodes, rendering it suitable for SDNs with large size. Ultimately, two examples involving relevant application in image encryption and decryption are provided to verify the effectiveness and applicability of the proposed scheme, and highlight the distinct advantage of switching behaviors in enhancing encryption confidentiality.