Robust Hybrid Controller Design: Cyber Attack Mitigation Strategy for Cyber-Physical Systems
Project Members
Cheolhyeon Kwon and Inseok Hwang
Cheolhyeon Kwon and Inseok Hwang
Abstract
This paper considers the controller design for Cyber-Physical Systems (CPSs) that is robust to various types of cyber attacks. While the previous studies have investigated a secure control by assuming a specific types of attack strategy, in this paper we propose a hybrid robust control scheme that contains multiple sub-controllers, each matched to a different type of cyber attacks. Then the system can be adapted to various cyber attacks (including those that are not assumed for sub-controller design) by switching its sub-controllers to achieve the best performance. We propose a method for designing the secure switching logic to
counter all possible cyber attacks and mathematically verify the system’s performance and stability as well. The performance of the proposed control scheme is demonstrated by an example of the hybrid H 2 - H infinity controller applied to a CPS subject to cyber attacks.