List of English Publication

@article{nokey,

title = {Complexity Reduction for Resilient State Estimation of Uniformly Observable Nonlinear Systems},

author = {Junsoo Kim and Jin Gyu Lee and Henrik Sandberg and Karl H. Johansson},

doi = {10.1109/TAC.2024.3459413},

issn = {0018-9286},

year  = {2025},

date = {2025-02-01},

urldate = {2025-02-01},

journal = {IEEE TRANSACTIONS ON AUTOMATIC CONTROL},

volume = {70},

issue = {2},

pages = {1267-1272},

abstract = {A resilient state estimation scheme for uniformly observable nonlinear systems, based on a method for local identification of sensor attacks, is presented. The estimation problem is combinatorial in nature, and so many methods require substantial computational and storage resources as the number of sensors increases. To reduce the complexity, the proposed method performs the attack identification with local subsets of the measurements, not with the set of all measurements. A condition for nonlinear attack identification is introduced as a relaxed version of existing redundant observability condition. It is shown that an attack identification can be performed even when the entire state cannot be recovered from the measurements. As a result, although a portion of measurements are compromised, they can be locally identified and excluded from the state estimation, and thus, the true state can be recovered. Simulation results demonstrate the effectiveness of the proposed scheme.},

keywords = {Estimation theory, Nonlinear system, Observability},

pubstate = {published},

tppubtype = {article}

}

@article{ShimSeo03,

title = {Recursive nonlinear observer design: beyond the uniform observability},

author = {Hyungbo Shim and Jin Heon Seo},

doi = {10.1109/TAC.2002.808485},

issn = {0018-9286},

year  = {2003},

date = {2003-02-01},

journal = {IEEE Transactions on Automatic Control},

volume = {48},

number = {2},

pages = {294-298},

abstract = {We propose a recursive design scheme of a state observer for multiple-input-multiple-output, partly lower triangular nonlinear systems. The design begins from the subdynamics far from the output and propagates to the subdynamics close to the output, recalling the backstepping scheme for nonlinear control. The proposed class of systems is fairly general since it includes nonuniformly observable and/or detectable multioutput systems. Error convergence to zero is proved assuming boundedness of inputs a posteriori (i.e., after the design), which is preferable whereas most results in the literature assume the boundedness; a priori (i.e., before the design). A global observer is proposed with the global Lipschitz condition of the system, but without any restriction on the size of Lipschitz coefficient. The Lipschitz condition can be removed when a semiglobal observer is of interest.},

keywords = {Observability},

pubstate = {published},

tppubtype = {article}

}