List of English Publication

@article{nokey,

title = {A Sliding Mode Approach to Asymptotic Recovery of Nominal Performance for Uncertain Linear Systems},

author = {Hyuntae Kim and Hyungbo Shim and Mohammad Ataei and Nam Hoon Jo and Gyunghoon Park},

doi = {10.1109/TIE.2025.3589423},

issn = {0278-0046},

year  = {2026},

date = {2026-02-01},

urldate = {2026-02-01},

journal = {	IEEE Transactions on Industrial Electronics},

abstract = {This article presents a new structure of a slid

ing mode disturbance observer (SM-DOB) for handling

model uncertainty and unmodeled disturbances. The pro

posed SM-DOB is composed of two key components. First,

a Levant’s differentiator is used to estimate the high-order

time derivatives of the output. To satisfy the conditions

required for the effective operation of Levant’s differentia

tor, we employ an integral SM technique so that on the slid

ing surface, the real plant’s dynamics are substituted with

the nominal dynamics. With this structure, the proposed

SM-DOB can achieve robust disturbance rejection and

recover nominal performance in finite time. The stability

and the finite time convergence of the proposed SM-DOB

are rigorously proved by the Lyapunov stability method.

Finally, to show the superiority and verify the validity of the

proposed SM-DOB, we conduct both numerical simulations

andlaboratory experiments with brushless dc (BLdc) motor

drives. It is observed that the proposedSM-DOBguarantees

satisfactory performance in rejecting both input distur

bance and plant uncertainty while },

keywords = {Nominal performance recovery, Sliding mode control, Uncertain systems},

pubstate = {forthcoming},

tppubtype = {article}

}

@article{KumariBandKimShim19,

title = {Output Feedback based Event-Triggered Sliding Mode Control for Delta Operator Systems},

author = {Kiran Kumari and Bijnan Bandyopadhyay and Kyung-Soo Kim and Hyungbo Shim},

doi = {10.1016/j.automatica.2019.01.015},

year  = {2019},

date = {2019-05-01},

journal = {Automatica},

volume = {103},

abstract = {In this paper, we present an output feedback based design of event-triggered sliding mode control for delta operator systems. For discrete time systems, multi-rate output sampling based state estimation technique is very useful if the output information is available. But at high sampling rates, the discrete-time representation of the system using shift operator becomes numerically ill-conditioned and as a result the observability matrix becomes singular as the sampling period tends to zero. Here, a new formulation of multi-rate state estimation (MRSE) for a small sampling period is presented. We first propose a new observability matrix, and then discuss its relationship with the observability matrix defined in the conventional sense. For the delta operator system with matched uncertainty, we have presented the design of MRSE based sliding mode control (SMC). Additionally, to make the control efficient in terms of resource utilization, MRSE based event-triggered SMC is proposed. The absence of Zeno phenomenon is guaranteed as the control input is inherently discrete in nature. Finally, the effectiveness of the proposed method is illustrated through numerical simulations, considering a ball and beam system, and a general linear system as a numerical example.},

keywords = {Sliding mode control},

pubstate = {published},

tppubtype = {article}

}