Fault-Tolerant Consensus Control for Multiagent Systems: An Encryption-Decryption Scheme

• 成果类型: Article
• 署名作者: Gao, Chen; Wang, Zidong; He, Xiao; Dong, Hongli
• 署名单位: Tsinghua University; Brunel University; Northeast Petroleum University; Northeast Petroleum University
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2021.3079407
• 发表日期: 2022
• 页码: 2560-2567
• 关键词: Cryptography; observers; Fault tolerant systems; Fault tolerance; Consensus control; Multi-agent systems; Symmetric matrices; consensus; encryption-decryption scheme; fault-tolerant control; Multiagent system (MAS); sensor faults

摘要

In this article, the fault-tolerant consensus control problem is investigated for multiagent systems with sensor faults. A first-order difference equation is utilized to describe the sensor fault, and an observer is designed to estimate the state and the fault simultaneously. For security enhancement and/or congestion mitigation purposes, the estimated state is first encrypted into a series of finite-level codewords by an encryption algorithm and, then, transmitted to other agents through a directed topology. After being received, the codewords are then decrypted by the corresponding decryption algorithm and subsequently utilized to design the consensus controller. By constructing a novel matrix norm along with its compatible vector norm, we obtain a necessary and sufficient condition, which serves as an index in the observer and the controller design. In the end, a simulation example is given to demonstrate the validity of the results in this article.