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서성조(Sung Jo Seo),지창호(Chang Ho Ji),김재용(Jae Yong Kim),조인제(In Je Cho) 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.4
현대의 항공기는 진보된 전자식 비행제어 적용으로, 고 기동 성능 및 제어가 이루어지고 있으며, 지속적으로 발전하고 있다. 이러한 비행제어 기술 발전은 전자식 비행제어 확인과 검증을 포함한다. 전자식 비행제어는 고 신뢰도와 비행 안전성을 보장할 수 있는 시험이 요구된다. 본 논문은 전자식 비행제어 시스템 시험 프로세스의 한 부분인 아이언버드에 대해 다루었다. 아이언버드 시험은 항공기 초도비행 전 비행안전 보장을 위한 비행안전항목을 확인/검증하며, 실 항공기 탑재장비와 비행운용프로그램을 적용하여 실 항공기와 가장 유사한 동적시험 환경을 제공하여 체계/부체계 간의 연동 및 호환성을 충분하게 검증하여 안전성을 확보한다. 아이언버드는 해외 모든 전투기 개발프로그램에 필수적으로 적용된 시험설비로서 비행제어계통, 유압계통, 전기계통이 연동된 디지털 전자식 비행제어계통 적용 시 필수 요구사항이다. New generation aircraft requires high maneuver-ability and control performance which are made possible using advanced flight control technology based on the concept of the fly-by-wire (FBW). Included in the flight control technology is the verification and validation process for an advanced flight control system (FCS) employed in the new generation aircraft. The digital FBW FCS requires various dedicated tests to ensure a high degree of the system reliability and flight safety. This paper deals with an ironbird for the digital FBW FCS as a subset of the system test process. The ironbird test ensures the flight safety to perform verification and validation for the flight safety items prior to the first flight, and secures the system safety to verify enough compatibility and interoperability between system and subsystem, with providing dynamic test environment most similar to an actual aircraft by applying actual on-board aircraft equipment and operational flight program. The ironbird is a test facility requisitely used in all the overseas fighter development programs, and is necessarily required when a digital fly-by-wire flight control system is applied in which the flight controls, hydraulic systems, and electrical power system are connected.
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박상헌,심학보,이수구,서성조 서울산업대학교 산업대학원 1992 大學院論文集 Vol.1 No.1
본 연구는 혼합 미생물을 이용한 페놀 함유폐수의 생물학적 처리에 관한 연구로서, 높은 페놀 농도에서의 이를 분해시킬 수 있는 균주를 개발하고 페널 함유폐수의 효과적인 처리를 위한 실험연구이다. 각종 공장폐수, 슬러지, 토양 등 40여종의 시료로부터 페놀 분해균을 선별하였으며, 페놀농도를 단계적으로 높여 미생물을 적응시킨 결과, 페놀농도 1,000ppm의 높은 농도에서도 잘 증식하며 페놀을 효과적으로 분해시킬 수 있었다. 혼합 미생물을 분리 동정한 결과, 우점종은Pseudomonas PI인 것으로 나타났다. 회분식 실험에서 초기 페놀농도, 균체량 및 glucose 농도 등을 변수로 실험하였느데, 페놀 분해속도는 시간에 따라 증가함을 나타내었다. 또한 페놀이 완전 제거되는데 소요되는 시간은 초기 페놀 농도에 비례하였으며, 균체 주입량에 다른 초기 MLSS농도의 대수식으로 나타낼 수 있었다. 연속식 활성 슬러지법에 의한 실험에 있어서, 본 실험조건에서 페놀이 완전 제거되는데 필요한 반응기내의 체류시간은 유입 페놀농도 500ppm인 경우 20시간이 소요되는 것으로 나타났다. This investigation was carried out to study the biodegradation of phenol in wastewater using mixed microorganisms. The mixed clutures of phenol degrading microorganisms were selected from various sources such as industrial wastewaters, sludges and soils. The mixed cultures could be adapted to high concentration of phenol by increasing the phenol concentration step by step. The phenol was degraded easily even up to 1,000ppm of phenol using these microorganisms. The predominant bacteria was isolated and characterized as Pseudomonas PI. In a batch system, the removal rate of phenol increased with time due to the lag time of microorganism adapation. The duration time during which phenol could be completely removed was linearly proportional to the initial phenol concentration. And the duration time(td) could be expressed as a funtion of logarithmic initial MLSS concentration(x) as follows. td=?? [8.68-In(x)] In a continuous system, the required residence time to remove phenol completely was found to be 20 hours and 35 hours 500 ppm and 800 ppm of influent phenol concentrations, respectively.
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섬유상 담체 접촉포기법에 의한 오수처리에 있어서 COD부하의 영향
이수구,서성조,조창호 서울産業大學校 1995 논문집 Vol.41 No.1
This investigation was carried out to study the effect of COD loading rate on the treatment of sewage form office building and department store by attached growth biological treatment method using fibrous media. Supermodule made of polyvinylidine chloride and acryl fiber was packed in the four consecutive aerated reactors with 25% packing ratio. The pilot plant was set up in the field of S office building and K department store and operated with different COD loading rate in the range of 0.55∼3.36kgCOD/m³.d. In spite of large fluctuation of influent concentration, the effluent concentrations were stable and the removal efficiencies of COD? and BOD were obtained up to 88% and 93%, respectively. In order to maintain the effluent BOD concentration within 30mg/L, COD loading rate must be controlled within 1.0 kgCOD/m³.d and F/M ratio operated within 0.21 kgBOD/kgVS.d. COD and BOD removal rates increased with COD loading rate and the removal rate in the first reactor of 4 consecutive reactors was the highest and followed in 2, 3, 4 reactor. COD removal rates in the first reactors were 1.1∼2.6 times compared with average removal rates while those of BOD removal rates were 2.5∼2.9 times with different loading rate. The relationship between removal rate and COD loading rate could be expressed as Michaelis-Menten type and the maximum removal rates of COD and BOD were determined as 0.34kgCOD?/kgVS.d and 0.59kgBOD/kgVS.d, respectively. The weight of wet biomass attached to fibrous media was in the range of 0.46∼0.86kg/m and the concentration of VS was in the range of 3,410∼5,120mg/L. The production rate of excess sludge was very low within 8gDS/m³of influent due to surface characteristics of media and self-degradation of sludge in the biofilm.
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