2020 |
Jin Gyu Lee / Junsoo Kim / Hyungbo Shim Fully distributed resilient state estimation based on distributed median solver Journal Article In: IEEE Transactions on Automatic Control, vol. 65, no. 9, pp. 3935-3942, 2020, ISSN: 0018-9286. Abstract | Links | BibTeX | Tags: Analytical redundancy, Attack detection, Attack resilience, Blended dynamics, Cyber-physical systems, Heterogeneous multi-agents, Resilient state estimation, Strong coupling @article{Lee20b,In this article, we present a scheme of fully distributed resilient state estimation for linear dynamical systems under sensor attacks. The proposed state observer consists of a network of local observers, where each of them utilizes local measurements and information transmitted from the neighbors. As a fully distributed scheme, it does not necessarily collect a majority of sensing data for the sake of attack identification, whereas the compromised sensors are eventually identified by the distributed network and excluded from the observers. For this, the overall network (not the individual local observer) is assumed to have redundant sensors and assumed to be connected. The proposed scheme is based on a novel design of a distributed median solver, which approximately recovers the median value of local estimates. |
2019 |
Jin Gyu Lee / Hyungbo Shim Behavior of a network of heterogeneous Li´enard systems under strong output coupling Proceedings Article In: Proc. of 8th IFAC Symposium on Mechatronic Systems & 11th IFAC Symposium on Nonlinear Control Systems, pp. 256-261, IFAC, Vienna, Austria, 2019. Abstract | Links | BibTeX | Tags: Approximate synchronization, Blended dynamics, Heterogeneous multi-agents, Internal model principle, Lienard system, Oscillations, Singular perturbation, Strong coupling @inproceedings{LeeShim19b,In this paper, to participate in the understanding of a biological system, we analyze the synchronous and oscillatory behavior of coupled Liénard systems. In particular, we will consider a network of heterogeneous Liénard systems under output diffusive coupling to take into account two fundamental characteristics of a biological system. The key idea in this work is to emphasize the role of a network, which introduces an emergent behavior that each individual element approximately follows, hence making elements approximately synchronize. The intuition comes from a series of developments recently made in the name of ‘blended dynamics,’ and thus, the common philosophy of ‘blended dynamics’ approach enables us to illustrate a biological phenomenon that collective behavior is preserved even when there are some malfunctioning elements. |
List of English Publication
2020 |
Fully distributed resilient state estimation based on distributed median solver Journal Article In: IEEE Transactions on Automatic Control, vol. 65, no. 9, pp. 3935-3942, 2020, ISSN: 0018-9286. |
2019 |
Behavior of a network of heterogeneous Li´enard systems under strong output coupling Proceedings Article In: Proc. of 8th IFAC Symposium on Mechatronic Systems & 11th IFAC Symposium on Nonlinear Control Systems, pp. 256-261, IFAC, Vienna, Austria, 2019. |