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적외선 체열 촬영을 이용한 중풍칠처혈 자침시 체표온도 변화에 관한 Pilot Study
이윤규,이윤경,서보명,윤종석,김경운,최성훈,이경민,임성철,정태영,한상원,서정철,Lee, Yun-Kyu,Lee, Yoon-Kyoung,Seo, Bo-Myung,Yun, Jong-Seok,Kim, Kyung-Un,Choi, Sung-Hun,Lee, Kyung-Min,Lim, Seong-Chul,Jung, Tae-Young,Han, Sang-Won,Seo, Ju 대한약침학회 2005 Journal of pharmacopuncture Vol.8 No.3
Objectives : This study was designed to find out the effect of seven acupoints of stroke in cerebrovascular hemiplegia patients. Methods : This study was performed on 6 patients with cerebrovascular hemiplegia (test group) and 6 health persons(control group). We measured temperature of skin surface of test and control group using digital infrared thermographic imaging(D.I.T.I) after acupunture on seven acupoints of stroke. And we calculated difference of skin temperature between healthful and affected side for each groups. Results : There was significant difference in area 3 in both two groups between before and after acupuncture. But in general there Was no significant difference between two groups on thermographic change. Conclusions : This is pilot study, so further studies are required to find out the effect of seven acupoints of stroke in cerebrovascular hemiplegia patients.
금속 및 샌드위치 복합재 유도탄 구조체의 흡음 및 차음 특성에 관한 실험적 연구
이윤규,이대은,진병대,이동민,Lee, Yoon-kyu,Lee, Dae-oen,Jin, Byung-Dae,Lee, Dong-min 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.3
Recently, as the speed and performance of the launcher and the missile have been improved, it is necessary to consider the acoustic load of launching and flight in initial design step. In this paper, an experimental study on acoustic absorption and transmission characteristics of aluminium vs. sandwich composite structures were conducted. The overall noise reduction was evaluated by performing an acoustic test in the reverberation room, and the acoustic absorption and transmission loss of the structures were analyzed by conducting the sound absorption test inside the structure.
외란관측기와 슬라이딩 모드 제어기를 이용한 영구자석 동기전동기의 강인제어
이윤규,안호균,윤태성,곽군평,박승규,Lee, Youn-kyu,Ahn, Ho-gyun,Yoon, Tae-sung,Kwak, Gun-pyong,Park, Seung-kyu 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.7
Many robust controllers have been studied but most are considered in the theoretical point of view and can be used for only specific systems. So, in this paper, a more practical robust controller is proposed based on SMC(sliding mode control) and disturbance observer. The integral sliding mode is used to eliminate the reaching phase and minimizes the steady-state error, and the disturbance observer reduces the chattering due to the switching input for the bounded disturbances. The inevitable chattering of SMC is also removed by replacing the sign function with dead-zone function. The proposed controller has the improved steady-state error and robustness compared to PID controller. 불확실성에 강인한 제어기에 대한 연구는 활발하지만 대부분의 연구들은 제어 이론의 효용성을 검증하기 위한 실험 수준에 머무르거나 특정한 전용시스템에만 구현되고 있어 범용성을 가지는 상용화된 제품에는 적용되지 못하고 있다. 따라서 본 논문에서는 슬라이딩모드제어기와 외란관측기를 이용한 보다 실용적인 강인한 제어기를 제안하였다. 도달시간을 제거하고 정상상태오차를 최소화하기 위해 적분슬라이딩모드를 이용하였고, 외란관측기를 적용하여 스위칭 입력의 채터링을 감소시켰다. 또한 아직까지 남아있는 채터링은 데드존 함수를 이용함으로써 완전히 제거하였다. 제안된 제어기는 PID제어기에 비해 개선된 정상상태 오차와 강인성을 보인다.
봉약침이 중풍후유증으로 인한 견비통에 미치는 치료 효과에 관한 연구
이윤규 ( Yun Kyu Lee ),이윤경 ( Yoon Kyoung Lee ),김재수 ( Jae Su Kim ),이경민 ( Kyung Min Lee ),이봉효 ( Bong Hyo Lee ),정태영 ( Tae Young Jung ),임성철 ( Seong Chul Lim ) 대한경락경혈학회 2008 Korean Journal of Acupuncture Vol.25 No.2
Objective: The aim of this study is to investigate the curative effect of Bee Venom Acupuncture Therapy for pain and Limited R.O.M (range of motion) of shoulder in stroke patients. Methods: The subjects of this study were 6 patients with shoulder pain in stroke sequelae. Routine Oriental Medical programs (Acupunture, moxibustion, herbal medicine and physical therapy) were maintained for each subject throughout this study. Single subject ABABAB design was adopted. Each period was 4 days as a rule. Only during the treatment period, Bee Venom Acupuncture Therapy was provided as intervention at the acupoints of LI15(Gyeonu), TE14(Gyeollyo), GB21(Gyeonjeong), LI14(Bino). The change of pain was measured with a Visual Analogue Scale(VAS). The pain threshold was measured using pressure algometer at the same acupoints where Bee Venom Acupuncture Therapy was provided. And the R.O.M of shoulder joint (flexion, extension, abduction, adduction, external rotation, internal rotation) was measured as well. Analysis was performed by Bayesian analysis using WinBUGS for the comparison of treatment(Bee Venom Acupuncture Therapy) and non-treatment. Results: The median overall improvement for difference in VAS was -2.219(-3.213, -1.175), for difference in external rotation of shoulder R.O.M was 9.992(-2.298, 18.49), for difference in tenderness score of LI14(Bino) by pressure algometer was 5.05(0.6283, 7.762). 95% credibility intervals being shown in brackets. However, the median overall improvement for difference in the other measurements was not significant. Conclusion: This study suggests that Bee Venom Therapy may be applicable to decrease pain and improve R.O.M of shoulder in hemiplegia patients with stroke. Further elaborated single subject designs need to be accumulated to confirm the effects of Bee Venom Acupunture Therapy on shoulder pain in patients with stroke sequelae.
인덕턴스의 포화현상을 이용한 IPMSM의 회전자 초기위치 추정
이윤규(Yoon-Kyu Lee),김상훈(Sang-Hoon Kim) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.2
This paper propose a method to detect the rotor position of IPMSM(Interior permanent magnet synchronous motor) at standstill without a position sensor. The proposed method is based on current variation caused by the magnetic saturation of stator core as rotor position. By choosing an appropriate voltage vector and applying it to phase winding, it enables the algorithm to discern between a north pole and south pole, and subsequently estimates an absolute position. This method dose not depend on the model of the motor and the motor parameter.