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관절염(關節炎) 관련 봉독(蜂毒) 연구에 대한 문헌적 고찰
조남훈,강성길,이재동,Cho, Nam-hun,Kang, Sung-keel,Lee, Jae-dong 대한침구의학회 2003 대한침구의학회지 Vol.20 No.6
Background and Objectives: Bee venom therapy is a new acupuncture theraphy using both acupuncture effect and a medical effect that the biochemical peculiar material affects body. The bee venom theraphy is efficacious of injecting region of disease and acupoint with extracting bee venom from bee and processing it. There have been more than 20 dissertations in Korea about bee venom and the bee venom research has actively been carrying done in other countries such as US, China, Russia, Northern Europe since 1980s. This paper is to understand the trend of arthritis and bee venom, and will be contributed to further bee venom study by analyzing local and international theses. Material and Method: This paper is reported by analyzing the dissertations regarding arthritis and bee venom of Korea and other countries and referencing PubMed. The reference terminology is as follows. bee venom, bee venom therapy, apitoxin, apitherapy, bee sting, bee sing therapy, arthritis, rheumatoid, rheumatic arthritis and so on. Results and Conclusions: The following result have been obtained. 1. Bee venom has an effect on both in vivio and in vitro of arthritisthis with suppressing inflammation, fever and pain. 2. Occasionally bee venom may induce either pain or inflammation. 3. Bee venom induces acute pain in healthy condition, while it suppresses inflammation and pain in regional inflammation state. 4. Bee venom may either induce or suppress pain and inflammation according to the used dosage.
궤환선형화 기법을 이용한 무인항공기 2차원 지상 이동목표물 추적 유도기법
조남훈,김유단 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.4
본 논문에서는 고정익 무인항공기가 지상에서 저속으로 이동하는 목표물을 거리를 두고 추적하기 위한 2차원 비선형 유도기법을 제안하였다. 무인항공기와 목표물의 운동을 2차원 질점 모델로 고려하고, 목표물의 위치 및 속도, 그리고 가속도에 대한 정보가 무인항공기에 정확히 주어진다는 가정 하에 시선동역학을 유도하였다. 유도된 시선동역학에 대해 궤환선형화 기법을 기반으로 하여 비선형 유도기법을 설계하였다. 보조 제어입력 설계를 위해 비례미분 제어와 선형최적제어 기법을 이용하였다. 수치 시뮬레이션을 통해 제안한 유도기법의 성능과 유효성을 검토하였다. Nonlinear guidance law of fixed wing UAV(Unmanned Aerial Vehicle) is designed to track slowly moving ground target while maintaining desired standoff distance. Two-dimensional point mass model is used to describe the motion of the UAV and the target. The line-of-sight dynamics is formulated under the assumption that the information about the position, velocity, and acceleration of the target is fully available to the UAV. The nonlinear guidance law is designed based on feedback linearization of the line-of-sight dynamics. Methods using proportional-derivative control and linear optimal control are adopted to design the auxiliary input of the feedback linearized system. Tracking performance and validity of the proposed guidance law is verified using numerical simulation.
조남훈 대한전기학회 2004 전기학회논문지 D Vol.53 No.11-D
In this paper, we propose sufficient conditions under which nonlinear systems can be transformed into nonlinear observer canonical form in the extended state space by virtue of dynamic system extension. The proposed scheme weakens two major restrictions of observer error linearization technique. Once a nonlinear system is transformed into nonlinear observer canonical form using dynamic system extension, a state observer can be easily designed. Two illustrative examples are included in order to compare the proposed scheme and observer error linearization method.
Disturbance Observer for Non-minimum Phase Linear Systems
조남훈,심형보,손영익 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.5
Disturbance observer (DOB) approach has been widely employed in the industry thanks to its powerful ability to attenuate disturbances and compensate plant uncertainties. Motivated by the fact that the application of the DOB approach has been limited to minimum phase systems, we propose a new DOB configuration for non-minimum phase systems. Rigorous analysis for robust stability and performance recovery is presented in terms of a new filter (s). By restricting the plant uncertainty to a multiplicative perturbation, we also present a systematic design methodology for the filter (s) by virtue of the H∞ synthesis technique. An illustrative example of autopilot design is presented to show the effectiveness of the proposed method for which it is not easy to design H∞ controller to achieve some control goals. The simulation results show that the response of the perturbed system in the pres-ence of disturbance can be recovered to the nominal system response in the absence of disturbance.