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JKSPE : Journal of the Korean Society for Precision Engineering

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"Kyoung Hoon Lee"

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"Kyoung Hoon Lee"

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The Study on the Mine Protective Structural Design of Wheeled Armored Vehicle Body
Chan Young Park, Kyoung Hoon Lee
J. Korean Soc. Precis. Eng. 2019;36(3):255-261.
Published online March 1, 2019
DOI: https://doi.org/10.7736/KSPE.2019.36.3.255
In this study, to develop mine protective design technology for wheeled armored vehicles, designing and simulating of test specimens based on the 8×8 military combat vehicle, were executed and mine protection effectiveness was proven, by testing under the two work steps such as 1st step for conceptual model and 2nd step for vehicle segment. Experiments for both test models of each step were performed according to test conditions of NATO standard, STANAG 4569 Level, and simulations were performed by the commercial code, LS-DYNA. On the 1st step, a conceptual model was designed, and its protection effectiveness was verified by simulation before testing and then it was proven by testing. On the 2nd step, the vehicle segment with protection design technology from the 1st step was designed better, to consider dynamic vertical deformation, injury values of a human dummy, and effects of installed components on the bottom of the model. Finally, satisfaction for protection effectiveness and IARVs (Injury Assessment Reference values) of a human dummy were verified by testing, and also the possibility of application for wheeled armored vehicles were confirmed.
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A Study on the Pivot Steering Control of an In-Wheel Drive Vehicle with Trailing Arm Suspensions
Chi Ung Kim, Kyoung Hoon Lee, Kwan Je Woo
J. Korean Soc. Precis. Eng. 2012;29(7):745-752.
Published online July 1, 2012
The pivot steering of an individual wheel motor drive vehicle is an effective steering maneuver in the narrow road, but it has become a matter of concern that the torque input of each wheel is very difficult to determine. In this study, the independent yaw moment control was proposed for the smooth pivot steering control of an in-wheel drive vehicle. For this control method, the vertical forces of tires were estimated from the trailing arm dynamic model, and the yaw moments of individual wheels were calculated from the vehicle dynamic model. Dynamic simulation results showed that the independent yaw moment control was much more effective on the minimization of the instabilities of pivot steering in comparison with the conventional direct yaw moment control with yaw rate feedback.
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