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김재만(Jaeman Kim),이진욱(Jinwook Lee),김도엽(Doyeop Kim),권선덕(Seondeok Gwon),백주현(Juhyun Baek) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
At present, the demand for the clothing manager is increasing because dust enters the home when going out due to fine dust, and thus, some of the household energy takes up the clothing manager. However, the currently available clothing managers are using more electricity than they think and are less efficient than the actual clothes dryers. Therefore, it is comparable to analyze the mechanism by internal flow in the clothing manager and to grasp the heat and material transfer characteristics of the dry air during drying, which enables efficient design of the household clothing manager.
김철승(Chul-Seung KIM),공세진(Se-Jin KONG),엄광문(Gwang-Moon EOM),권선덕(Sun-Duck KWON),김종문(Jong-Moon KIM) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.7
The objective of this work is to develop the knee joint model for representing various pendulum motions and quantifying the spasticity. Knee joint model included the extension and flexion muscles. The joint moment consists of both the active moment from the stretch reflex and the passive moment from the viscoelastic joint properties. The stretch reflex was modeled as nonlinear feedback of muscle length and the muscle lengthening velocity, which is physiologically-feasible. Moreover, we modeled the spastic reflex as having dynamic threshold to account for the various pendulum trajectories of spastic patients. We determined the model parameters of three patients who showed different pendulum trajectories through minimization of error between experimental and simulated trajectories. The simulated joint trajectories closely matched with the experimental ones, which show the proposed model can predict pendulum motions of patients with different spastic severities. The predicted muscle force from spastic reflex appeared more frequently in the severe spastic patient, which indicates the dynamic threshold relaxes slowly in this patient as is manifested by the variation coefficient of dynamic threshold. The proposed method provides prediction of muscle force and intuitive and objective evaluation of spasticity and it is expected to be useful in quantitative assessment of spasticity.
정다운(Da Woon Jung),강희주(Hee Ju Kang),안중근(Joong Keun An),이진욱(Jin Uk Lee),권선덕(Sun Dug Kwon),박찬정(Chan Jung Park) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
A bidet gets rid of residues with clean water after using the toilet. Beyond its primary purpose, bidet hygiene maintenance should be taken into account in that sanitary ceramics are a place of the spreading of germs and bacteria. In order to keep then clean, the inner part of the sanitary ceramics should be cleaned whenever using the toilet, but people are reluctant to doing it. To prevent the spreading of germs and bacteria, the sanitary ware cleaning technology with small size and strong cleaning power should be realized in bidet products. Therefore, this study is conducted to discuss the cleaning technology that is small but rotation, upward and downward mobility are available.