摘要：This paper focuses on the problem of stability analysis and controller design for a class of delay systems based on networked control systems. By introducing some free matrix variables, some criteria for stability analysis and observer-based control law design can be obtained by the solving of linear matrix inequalities. A numerical example is also offered to prove the effectiveness of the proposed method.

摘要：随着社会发展,电缆凭借诸多优势得到了广泛应用。但各类违章行为造成的电缆受外力破坏事故层出不穷,带来社会经济的巨大损失。针对配电网电力电缆外力破坏问题,文章基于光纤干涉原理设计了一种适用于中低压配电网电缆通道的防外侵预警系统。该系统能够实现振动信号辨识,对入侵信号进行防区定位以及综合评估。它主要由硬件系统和软件系统两部分构成,将监控范围内的入侵振动信号进行采集,分别提取其属性特征,采用支持向量机和BP神经网络对入侵信号进行识别。入侵振动信号可划分为安全、警告、危险三种等级,一旦危险侵入源靠近电缆通道,预警系统将通过短信形式及时提醒值班人员。测试结果表明,该系统设计合理,对振动信号识别准确率高,可达到80%。该系统工作原理简单,安装便捷,适用于监测中低压配电网电缆通道外力入侵。