This paper investigates the attack detection, isolation and reconstruction problems for cyber-physical systems (CPSs) under sensor attacks. We deal with all the issues in view of an overall system instead of every subsystem. To begin with, a Luenberger-like observer is designed and a state interval estimation method is proposed based on the zonotope theory. And then, a sensor attack detection scheme is developed by using the interval estimation of the output error as the dynamic residual. Besides, the sensor detection method is modified to form a sensor attack isolation method to locate the exact subsystems suffering from sensor attacks. Moreover, by treating sensor attacks as part of the states, an augmented descriptor system is constructed and the state and sensor attack asymptotic estimation problems are discussed in detail. Finally, a simulation example is given to verify the effectiveness of the proposed methods.

中文翻译：

---

基于带位理论的网络物理系统基于观测器的传感器攻击诊断

本文研究了传感器攻击下的网络物理系统 (CPS) 的攻击检测、隔离和重建问题。我们从一个整体系统而不是每个子系统的角度来处理所有问题。首先，设计了类Luenberger观测器，提出了基于带位理论的状态区间估计方法。然后，通过使用输出误差的区间估计作为动态残差，开发了传感器攻击检测方案。此外，修改传感器检测方法，形成传感器攻击隔离方法，以定位遭受传感器攻击的确切子系统。此外，通过将传感器攻击视为状态的一部分，构建了增强描述符系统，并详细讨论了状态和传感器攻击渐近估计问题。最后，