소형민수헬기 능동진동제어시스템 개발

김남조(Nam-Jo Kim),곽동일(Dong-Il Kwak),강우람(Woo-Ram Kang),황유상(Yoo-Sang Hwang),김도형(Do-Hyung Kim),김찬동(Chan-Dong Kim),이기진(Ki-Jin Lee),소희섭(Hee-Soup So) 한국항공우주학회 2022 韓國航空宇宙學會誌 Vol.50 No.3

헬기의 능동진동제어시스템(AVCS)은 주로터로부터 발생되는 진동을 제어하며, 수동형 진동저감장치 대비 저중량으로 우수한 진동저감 성능을 발휘한다. 본 논문에서는 FxLMS 알고리즘을 기반으로 타코미터 및 가속도 센서 신호를 통해 연산된 제어명령을 하중발생기(CFG)로 전달하여 소형 민수헬기의 진동을 제어하는 소프트웨어 개발 및 검증 내용을 제시하였다. DO-178C /DO-331 표준에 따라 모델 기반 설계 기법을 통해 진동제어 소프트웨어를 개발하였으며, PILS 및 HILS 환경에서 실시간 작동 성능을 평가하였다. 특히, PILS 환경에서는 LDRA 기반 검증 커버리지를 통해 소프트웨어의 신뢰성을 향상시켰다. AVCS를 소형민수헬기에 적용하기 위해 지상/비행시험을 통해 대상 헬기 동적응답특성 모델을 획득하였다. 이를 기반으로 시스템 최적화 분석 및 비행시험을 통해 최적 성능을 발휘하는 AVCS 형상을 결정하고, STC 인증을 획득하였다. Active vibration control system(AVCS) for helicopter enables to control the vibration generated from the main rotor and has the superb vibration reduction performance with low weight compared passive vibration reduction device. In this paper, FxLMS algorithm-based vibration control software of the light civil helicopter tansmits the control command calculated using the signals of the tachometer and accelerometers to the circular force generator(CFG) is developed and verified. According to the RTCA DO-178C/DO-331, the vibration control software is developed through the model based design technique, and real-time operation performance is evaluated in PILS(processor in-the loop simulation) and HILS(hardware in-the loop simulation) environments. In particular, the reliability of the software is improved through the LDRA-based verification coverage in the PIL environments. In order to AVCS to light civil helicopter(LCH), the dynamic response characteristic model is obtained through the ground/flight tests. AVCS configuration which exhibits the optimal performance is determined using system optimization analysis and flight test and obtain STC certification.

간월호 퇴적토에서의 영양염류 용출 특성 분석

황순호 ( Soonho Hwang ),전상민 ( Sang Min Jun ),이도길 ( Do Gil Lee ),김석현 ( Seok Hyeon Kim ),이현지 ( Hyunji Lee ),김계웅 ( Kyeung Kim ),강문성 ( Moon Seong Kang ) 한국농공학회 2018 한국농공학회 학술대회초록집 Vol.2018 No.-

간월호는 서산시에 위치한 수혜면적이 6,446 ha에 이르는 담수화된 농업용 저수지로서, 해수 차단 후 수질이 지속적으로 악화되어 최근 들어 호내 수질이 농업용수 목표수질인 Ⅳ등급을 상회하는 등 농업용수로 활용에 어려움을 겪고 있다. 이에 따라 수질 악화 원인을 규명하기 위한 다양한 연구가 이루어지고 있으며, 수질 오염을 야기하는 상류 유역에 대한 연구뿐만 아니라 호내 퇴적물 관리 및 퇴적물로 인한 영양염류의 용출 문제에 대한 연구도 중요하다고 할 수 있다. 따라서 본 연구에서는 간월호 퇴적토로부터의 호내 수질 오염 기여도를 평가하기 위한 기초자료로서 용출 실험을 실시하였다. 용출 실험은 간월호 호내 3지점 (상류, 중류, 하류)에 대해 각각 호기성, 혐기성 실험을 2회 반복하였으며, 오염물질 조사 항목은 TOC, NH₄-N, NO₂-N, NO₃-N, PO₄-P, T-P, T-N, COD로 총 8항목이다. 간월호 용출 실험에 앞서 용출 실험 재료인 퇴적토의 간월호 퇴적물의 오염도를 확인하기 위하여, 입도 분석뿐만 아니라 강열감량, 유기물함량, T-N, T-P 항목에 대한 분석을 실시하였으며, 퇴적토는 풍건 및 2 mm 체 선별 후 지름 10cm, 높이 44cm의 유리컬럼에 충진하여 이용하였다. 현장 조건 중 호기 및 혐기 조건을 모의하기 위해, 호기성 조건은 DO의 일정 농도가 유지되도록 폭기 장치를 이용하였으며, 혐기조건은 알루미늄 호일로 컬럼 외부를 감싸 빛을 차단하는 동시에 질소가스를 계속 주입하여 혐기상태를 유지하였다.

GIS을 활용한 인공어초의 적지 선정에 관한 연구

김범규,황도현,윤홍주,서원찬,Kim, Bum-Kyu,Hwang, Do-Hyun,Yoon, Hong-Joo,Seo, Won-Chan 한국전자통신학회 2015 한국전자통신학회 논문지 Vol.10 No.5

This study carried out in order to investigate the most basic elements of suitability selection methods for composition of artificial reef. Acquired data by in-situ measurements and satellite remote sensing analysed in applying GIS. To identify the characteristic of marine environment around the West Sea, the South Sea and the East Sea of Korea, physical conditions-seabed sediment and depth, biological conditions-chlorophyll-${\alpha}$, chemical conditions-Sea Surface Temperature(SST) and DO were used. Suitable sites for artificial reef are selected Taean Peninsula, Geoje, Wando, Pohang, Seocheon, etc. From now on, it will be helpful to effectively utilize artificial reef as well as construct synthetic database. It is also expected to use basic data for artificial reef facilities management. 본 논문는 인공어초 조성의 가장 기본적인 요소인 적지선정을 위한 방법에 대해 고찰하였다. 현장관측과 위성 원격탐사(Remote Sensing, RS)로 획득한 자료를 지리정보시스템(Geographic Information System, GIS)을 활용하여 분석하였다. 한반도 주변해역의 해양환경 특성을 파악하기 위해 물리적 조건-해저저질, 수심, 생물적 조건-클로로필-${\alpha}$, 화학적 조건-해수온, DO를 활용하였다. 인공어초 적지로는 태안반도, 거제, 완도, 포항, 서천 등이 나타났다. 향후 본 연구는 인공어초 설치의 효율적인 활용뿐만 아니라 종합적인 데이터베이스의 구축에 도움을 줄 수 있을 것이다. 또한 인공어초 시설관리의 기초자료로 활용할 수 있을 것으로 기대된다.

청각장애 학생 수화문의 길이 발달

황도순 국립특수교육원 1996 특수교육연구 Vol.3 No.-

The purpose of this study was to investigate the length development of the sign language sentences which Korean deaf students began to learn after entering the schools for the hearing impairments. For this purpose, the samples of sign language scenes from 66 deaf students, who were selected by 6 students(3 male and 3 female) of each grade ranging from the 2nd grade of the elementary to the 3rd grade of the senior high course in schools for the hearing impairments, were recorded on viedeo tape and analyzed. the results can be summarized as follows. The lengthes of the sign language sentences increased according to the advance of the grade level. The length of the sign language sentence developed rapidly in the high-grades of elementary course, but did slowly after that time. The length of the sign language sentences most frequently appeared was 1 to 3 words in the low-grades of elementary course, 1 to 6 words in the high-grades of elementary and junior high course, and 4 to 9 words in the senior high course, respectively. The mean lengths of words were 1.16 in the low-grades of elementary course, 4.18 in the high-grades of elementary course, 4.62 in the junior high course, and 6.10 in the senior high course, respectively. The length development of the sign language sentences with the deaf students is later than that of Korean language sentences with the hearing students. but the reason is thought, not to be that the deaf students are more retarded than the hearing students, but to be that the deaf students' age exposed to the sign language is later.

物質的 想像力에 의한 建築의 價値表現에 關한 硏究 : 바슐라르의 철학적 고찰을 중심으로

黃秉燦,金度淵,晉正 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1

This study is starting from recognition o substances of which a physical thing is made in Architecture and supposing that traveling of meanings between an architect and a user can be had universality, with Gaston Bachelard's philosophical consideration, this study is to be dealt with the expression of value by the physical power of imagination in Architecture. Specially, a user can be recognition most generally by standing out physical nature of a basic premise as a power's effect, while the existing form and order of, in architecture, the study -centered trend of form. In that way, an architect can keep it in mind what I have on this page briefly above at the planning phase and one thing can be showed here that a physical means can make a matter of riching an architecture mentally possible.

혈당 측정에 있어서 반사광 비색법과 전기 화학 전극법의 비교

황유성,이도훈,우재근 충북대학교 의과대학 충북대학교 의학연구소 1995 忠北醫大學術誌 Vol.5 No.1

당뇨병환자에서 적절한 혈당을 유지하기 위한 목적으로 시험지봉 검사 방법이 1970년대 초 처음으로 개발된 이후 많은 자가 혈당기들이 고안되어 사용되고 있으며, 대부분이 반사광 비색법을 이용한 자가 혈당 측정기로 현재 국내에는 Glucometer(Ames), Glucoscan(Eiken), One TouchTRM Ⅱ(Lifescan), Accu-check Ⅲ(BM)등이 사용되고 있다. 저자들은 본원에서 이미 사용하고 있었던 반사광 비색법을 이용한 시험지봉으로 LIFESCAN사의 One TouchTM Ⅱ와 전기 화학 전극법을 이용한 Medisense사의 CompanionTM 2에 대하여 정밀도, 직선성, 비교방법과의 상관관계 및 혈액량과 헤마토크리트에 의한 영향, 관찰자간의 변이, 항응고제가 미치는 영향 등 측정에 영향을 미치는 여러 인자들에 대하여 평가를 시행하였다. 검사일내 정밀성(within day precision)은 두 기기 모두 5% 정도이었고, 검사일간 정밀성(day-to-day precision)은 CompanionTM 2가 3.14%∼6.53%, One touchTM Ⅱ가 4.69%∼8.13%의 변이계수를 보였다. 두 기기 모두 직선성이나 비교방법과의 상관관계가 우수하였다. CompanionTM 2와 One touchTM Ⅱ사이의 상관관계는 y=1.040x+21.679, r=0.9716이었다. 두 기기 모두 혈액량, 관찰자, 항응고제에 의해서는 영향을 받지 않았으며, 헤마토크리트에 의해서는 헤마토크리트가 낮을 때는 높은 혈당치를, 헤마토크리트가 높을 때는 낮은 혈당치를 나타냈다. The purpose of this study is to assess two monitors of blood glucose : One touch?? Ⅱ(Lifescan Inc.), which is using reagent strips by reflectance photometry and CompanionTM 2(Medisense Inc.), which is using electrochemical electrode method. Glucose was determined on capillary and venous blood samples from 70 adult diabetics by three different methodologies : One touchTM Ⅱ, CompanionTM 2 portable glucose meters (capillary) and the Hitachi 7150 analyzer(venous), which is using hexokinase method. In within-run precision studies for One touchTM Ⅱ and CompanionTM 2, coefficient variations (CVs, %) were 1.92∼5.09, 2.95∼4.79 at three different levels, respectively. In between-day percision studies for One touchTM Ⅱ and CompanionTM 2, CVs(%) were 4.69∼8.13, 3.14∼6.53 at three different levels, respectively. The linearity studies revealed r=0.9996 in One touch?? Ⅱ, r=0.9977 in CompanionTM 2, which were satisfactory. Correlation equation and coefficient for results by One touchTM Ⅱ and CompanionTM 2 vs those by hexokinase method(x) were : y=0.8087x-8.9566(r=0.9824) for One touchTM Ⅱ, y=0.8885x+4.4992(r=0.9807) for CompanionTM 2, which were satisfactory. The glucose levels were falsely high at low hematocrit concentration and falsely low at high hematocrit concentration in both monitors. The volume of blood applied to the test strips is not critical. We concluded that "One touchTM Ⅱ" using reagent strip by reflectance photometry and "Companion?? 2" using electrochemical electrode method is suitable for self monitoring of blood glucose.

-ung 파생어 연구

황도생 제주대학교 1985 논문집 Vol.22 No.2

스프레이 菊花의 왕겨경 循環式 養液栽培에서 養液의 濃度 및 供給回數의 영향

黃仁澤,金光秀,金月洙,金道翊,金正根 全南大學校 農業科學技術硏究所 1998 農業科學技術硏究 Vol.33 No.-

본 실험은 스프레이 국화 왕겨 배지를 이용한 순환식 양액재배에 있어서 양액의 적정농도와 공급횟수를 구명하고자 실시한 결과 양액 농도 처리에서는 원시표준액의 1.6배 처리구가 초장, 화경장, 경경, 화경수, 엽장, 엽폭, 절화중에서 가장 양호하였고, 1일 공급횟수는 표준농도(1.0배)는 12회가 좋았고 1.3배와1.6배 처리구에서는 6회공급구에서 절화품질이 좋았다. 양액농도별 개화기는 표준농도에 비해 1.3배는 2일, 1.6배 처리구는 3일정도 지연되었다. 양액 농도별 T-N함량은 1.3배 농도에서 많았고 양이온치환용량은 농도가 높은 1.6배 농도에서 높았으며 양액 농도별 엽록소 함량은 1.0배 농도에서 가장 높았다. This experiment was conducted to determine the optimal ionic strength of nutrient solution and fertigation frequency affecting growth and development of spray chrysanthemum (Dendranthema grandiflorum) in recycling system using rice hull. Growth parameters in terms of plant height, flowers diameter, stem diameter, number of flowers, leaf length and width and flower weight were shown better in thd 1.6 ionic strength of nutrient solution than those of 1.0 ionic strength of nutrient solution. Fertigation frequency was good at 12 times during day and night in the standard solution (1.0 ionic strength) while 6 times per day and night were good in both 1.3 and 1.6 strength of nutrient solution. Flowering time was postponed up to 2 day in the treatment of 1.3 ionic strength of nutrient solution, and 3 day in 1.6 ionic strength of nutrient solution. The content of total nitrogen was higher in the 1.3 ionic strength of nutrient solution. Cation exchange capacity was high in the 1.6 ionic strength of nutrient solution and chlorophyll content by the concentrations of nutrient solution was highest in the standard nutrient solution.

김승옥 소설에 나타난 남(男)-성(性)의 부재

황도경 이화여자대학교 이화어문학회 1999 이화어문논집 Vol.17 No.-

Seung Ok Kim is a writer who keenly depicts extensive social changes of Korea in 1960's. At that time, various social changes such as industrialization, civilization, and modernization were in progress in Korea Particularly the protagonists of his novels are often portrayed as abnormal, helpless and diseased men. This reflects the sterile reality of that time period. In other words, the source of life such as man and sex is absent in his novels. Both man and sex only exist only in the name of violence and conquest. Thus, this portrays the world of evil and fake father that dominates the sterile reality. Although the protagonists of each novel detest this evil fake father, he eventually becomes and resembles e evil fake father of his on. This distorted figures of Kim's protagonists reflect the reality of modem history. The reality of modem history is the very loss of sovereignty, conflict of ideology, and war and etc. For Kin, modernity or civilization is rather diseased and sterile world. Therefore, the absence of man and sex in Kim's novels reflects the reality of corrupted powerless man/father/nation. Hence, Seung Ok Kim is Korea's one of the most representative writers of 1960's who was acutely awared of and deeply concerned with the evil modernity which stands on the principle of conquest and struggle.

유압 모터 시스템에 대한 극점 배치 제어

황규동,이창훈,조영돈,김도석 충주대학교 2006 한국교통대학교 논문집 Vol.41 No.-

Pole Placement Control has been well establish in its theory. However, its practice value is yet to be appreciated in most industries. This paper presents an account in which the control strategy is run on the hydraulic motor. Using the input and output data from actual system, estimation of the model parameters are obtained by a function ARMAX(Autoregressive Moving Average with am exogenous signal) in Matlab and controller synthesis is achieved by a Pole placement control. Estimation system from a ARMAX is defined by third order and application of Pole placement control technique will be provide not only stability but also good performance for motion of hydraulic motor in any operation condition.