Hamdan Mutaz M, Mahmoud Magdi S, Baroudi Uthman A
Systems Engineering Department, King Fahd University of Petroleum and Minerals, P.O. Box 5067, Dhahran 31261, Saudi Arabia.
Computer Engineering Department, King Fahd University of Petroleum and Minerals, P.O. Box 1350, Dhahran 31261, Saudi Arabia.
ISA Trans. 2022 Mar;122:1-12. doi: 10.1016/j.isatra.2021.04.027. Epub 2021 Apr 27.
Industry Revolution 4.0 pushes the industry to digitize all its operations. Cyberphysical Systems (CPSs), such as autonomous automobile systems and medical monitoring are examples of this revolution. However, as these systems are interconnected via the Internet, they become more vulnerable to cyber-attacks and in particular, stealthy attacks. Cyber attacks could affect the operations of CPS and cause physical damages before any indication. So, there is a need to design a secure control system to withstand in these circumstances. In this article, an event-triggering control scheme is designed for discrete time CPSs contain random delays in measurements and actuation signals and subject to simultaneous hybrid distributed denial of service (DDoS) and deception attacks. The cyber attacks are designed as Bernoulli distributed white sequences with conditional probabilities that are variable. Moreover, An event-triggering control scheme is proposed for decreasing the communication overhead in the system, such that the measurements' signals are sent when a selected triggering condition is met. An observer based control is designed to maintain the stability of the CPS under all possible scenarios of single or hybrid simultaneous attacks in the forward and or backward communication. Linear matrix inequalities are used to represent the overall control scheme. At the end, two illustrative examples are presented and discussed to show the effectiveness of the presented scheme.
工业4.0推动各行业将其所有运营数字化。网络物理系统（CPS），如自动驾驶汽车系统和医疗监测系统，就是这场革命的实例。然而，由于这些系统通过互联网相互连接，它们更容易受到网络攻击，尤其是隐蔽攻击。网络攻击可能会影响CPS的运行，并在没有任何迹象之前造成物理损害。因此，需要设计一种安全控制系统来应对这些情况。在本文中，针对离散时间CPS设计了一种事件触发控制方案，该系统在测量和驱动信号中存在随机延迟，并受到同时发生的混合分布式拒绝服务（DDoS）和欺骗攻击。网络攻击被设计为具有可变条件概率的伯努利分布白序列。此外，还提出了一种事件触发控制方案，以减少系统中的通信开销，使得在满足选定的触发条件时发送测量信号。设计了一种基于观测器的控制，以在正向和/或反向通信中单一或混合同时攻击的所有可能情况下保持CPS的稳定性。线性矩阵不等式用于表示整个控制方案。最后，给出并讨论了两个示例，以展示所提方案的有效性。
