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

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 enhancemen...

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Bibliographic Details
Published in:IEEE transactions on automatic control Vol. 67; no. 5; pp. 2560 - 2567
Main Authors: Gao, Chen, Wang, Zidong, He, Xiao, Dong, Hongli
Format: Journal Article
Language:English
Published: New York IEEE 01.05.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Consensus
Consensus control
Control systems design
Controllers
Cryptography
Difference equations
Encryption
encryption–decryption scheme
Fault tolerance
Fault tolerant systems
fault-tolerant control
Mathematical analysis
Multi-agent systems
multiagent system (MAS)
Multiagent systems
Observers
sensor faults
Series (mathematics)
Symmetric matrices
Topology
ISSN:0018-9286, 1558-2523
Online Access:Get full text
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Summary: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.
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ISSN:0018-9286
1558-2523
DOI:10.1109/TAC.2021.3079407