List of English Publication

@article{ParkLeeShimEunJohansson19,

title = {Stealthy adversaries against uncertain cyber-physical systems: Threat of robust zero-dynamics attack},

author = {Gyunghoon Park and Chanhwa Lee and Hyungbo Shim and Yongsoon Eun and Karl H. Johansson},

doi = {10.1109/TAC.2019.2903429},

issn = {0018-9286},

year  = {2019},

date = {2019-09-01},

urldate = {2019-09-01},

journal = {IEEE Transactions on Automatic Control },

volume = {64},

issue = {12},

pages = {4907 - 4919},

abstract = {In this paper, we address the problem of constructing a robust stealthy attack that compromises uncertain cyberphysical systems having unstable zeros. We first interpret the (non-robust) conventional zero-dynamics attack based on Byrnes- Isidori normal form, and then present a new robust zero-dynamics attack for uncertain plants. Different from the conventional strategy, our key idea is to isolate the real zero-dynamics from the plant's input-output relation and to replace it with an auxiliary nominal zero-dynamics. As a result, this alternative attack does not require the exact model knowledge anymore. The price to pay for the robustness is to utilize the input and output signals of the system (i.e., disclosure resources). It is shown that a disturbance observer can be employed to realize the new attack philosophy when there is a lack of model knowledge. Simulation results with a hydro-turbine power system are presented to verify the attack performance and robustness.},

keywords = {Actuators},

pubstate = {published},

tppubtype = {article}

}

@article{ChwaChoiSeo04,

title = {Compensation of actuator dynamics in nonlinear missile control},

author = {Dongkyoung Chwa and Jin Young Choi and Jin Heon Seo},

doi = {10.1109/TCST.2004.825046},

issn = {1063-6536},

year  = {2004},

date = {2004-07-01},

journal = {IEEE Transactions on Control Systems Technology},

volume = {12},

number = {4},

pages = {620-626},

abstract = {This brief presents an approach to the compensation of the actuator dynamics in nonlinear missile control. In general, actuator dynamics are not considered in nonlinear missile control systems. Here, we analyzed the influences of actuator dynamics on the nonlinear missile controller and found that the second-order actuator dynamics showed risks of potentially destabilizing the overall system. Thus, to accommodate for the influence of the actuator dynamics, a compensator is proposed where the information of the nonlinear control input and the actual fin deflection is incorporated. We also conducted performance and stability analysis for the proposed control system, including actuator dynamics. We were able to confirm the validity of the proposed approach based on simulation results for the first- and second-order actuator dynamics.},

keywords = {Actuators},

pubstate = {published},

tppubtype = {article}

}