Cyber-physical system

About: Cyber-physical system is a research topic. Over the lifetime, 11096 publications have been published within this topic receiving 162489 citations. The topic is also known as: CPS.

Resilient control of cyber-physical systems against Denial-of-Service attacks

Abstract: The integration of control systems with modern information technologies has posed potential security threats for critical infrastructures. The communication channels of the control system are vulnerable to malicious jamming and Denial-of-Service (DoS) attacks, which lead to severe time-delays and degradation of control performances. In this paper, we design resilient controllers for cyber-physical control systems under DoS attacks. We establish a coupled design framework which incorporates the cyber configuration policy of Intrusion Detection Systems (IDSs) and the robust control of dynamical system. We propose design algorithms based on value iteration methods and linear matrix inequalities for computing the optimal cyber security policy and control laws. We illustrate the design principle with an example from power systems. The results are corroborated by numerical examples and simulations.

A Cyber-Physical Control Framework for Transient Stability in Smart Grids

Abstract: Denial of service attacks and communication latency pose challenges for the operation of control systems within power systems. Specifically, excessive delay between sensors and controllers can substantially worsen the performance of distributed control schemes. In this paper, we propose a framework for delay-resilient cyber-physical control of smart grid systems for transient stability applications. The proposed control scheme adapts its structure depending on the value of the latency. As an example, we consider a parametric feedback linearization (PFL) control paradigm and make it “cyber-aware.” A delay-adaptive design that capitalizes on the features of PFL control is presented to enhance the time-delay tolerance of the power system. Depending on the information latency present in the smart grid, the parameters and the structure of the PFL controller are adapted accordingly to optimize performance. The improved resilience is demonstrated by applying the PFL controller to the New England 39-bus and WECC 9-bus test power systems following the occurrence of physical and cyber disturbances. Numerical results show that the proposed cyber-physical controller can tolerate substantial delays without noticeable performance degradation.

Modeling Analysis and Control Research Framework of Cyber Physical Power Systems

Abstract: To implement the objective of smart grids,it is essential to introduce the state-of-the-art computing,communication and sensing technologies.Traditionally,the theoretical foundation and methodologies of power systems and information systems are independent.Thus,the existing power system analysis and control methods cannot adequately take into account the impacts of the information system.The cyber physical system(CPS) represents a new research area with a focus on integrating physical and information systems so as to build a new and powerful industrial system.Based on CPS and the characteristics of power systems,the concept of a cyber physical power system(CPPS) framework is presented.Several mathematical tools including the differential and algebraic equation set,finite automation,stochastic process and queueing theory are introduced to formulate the steady-state and dynamic models of CPPS.The steady-state and dynamic analysis of information systems is then introduced,and on this basis,the research direction for reliability and security of CPPS is developed.The networked control of CPPS is finally discussed,and new methods based on the delay and data loss compensation are proposed.