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FBW 항공기의 DDV 구동장치에 대한 구동전류 고장 모니터 설계
남윤수(Yoonsu Nam),박해균(Hae Kyoon Park),안종민(Jongmin Ahn),최섭(Sup Choi),권종광(Jongkwang Kwon) 한국항공우주학회 2006 韓國航空宇宙學會誌 Vol.34 No.3
본 논문은 유압 공급 변에서는 2중으로 전기제어 면에서는 3중으로 다중화된 DDV 구동장치에 대한 구동전류 고장 모니터 설계에 관한 논문이다. 다중화된 신호들 가운데 어느 한 채널에 고장이 발생한다면, 이 신호는 정확히 감지되어야 하고, 시기적절하게 제거 되어야 하며, 남겨진 정상채널들은 그 기능이 재조정되어야 한다. 조종면 구동장치의 고장 모니터 설계는 비행체 역학, 비행제어법칙, 그리고 유압 구동장치 운통특성이 모두 고려된 통합적 관점에서 수행되어야 한다. MIL-F-8785C에서 규정하고 있는 고장에 따른 비행체 천이 응답 요구조건으로부터 조종면 구동장치의 고장이탈 한계를 결정하는 설계 방법이 제시되었다. This paper deals with a driving current fault monitor design methodology for a DDV actuation system which has a dual hydraulic power supply system, and triplex electric control capability. A fault existing among these redundant channels should be detected accurately and removed timely, and the remaining channels are to be reconfigured in order to compensate the role of a removed faulty channel. An integrated analysis on the aerodynamics, flight control laws, and DDV actuation system is essential for the design of an actuation system fault monitor. A method to define a fault transient boundary which specifies a maximum travel of an actuation system caused by the first faulty operation is proposed based on the top level requirement on the fault effect specified in MIL-F-878SC.
Park, Hyanjoo,Choe, Seunghoe,Kim, Hoyoung,Kim, Dong-Kwon,Cho, GeonHee,Park, YoonSu,Jang, Jong Hyun,Ha, Don-Hyung,Ahn, Sang Hyun,Kim, Soo-Kil Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.444 No.-
<P><B>Abstract</B></P> <P>Pt catalysts for water electrolysis were prepared on carbon paper by using both direct current and pulse electrodeposition. Controlling the mass transfer of Pt precursor in the electrolyte by varying the deposition potential enables the formation of various Pt particle shapes such as flower-like and polyhedral particles. Further control of the deposition parameters for pulse electrodeposition resulted in changes to the particle size and density. In particular, the upper potential of pulse was found to be the critical parameter controlling the morphology of the particles and their catalytic activity. In addition to the typical electrochemical measurements, Pt samples deposited on carbon paper were used as cathodes for a proton exchange membrane water electrolyser. This single cell test revealed that our Pt particle samples have exceptional mass activity while being cost effective.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pt catalysts were directly prepared on carbon paper by pulse electrodeposition. </LI> <LI> Pulse electrodeposited Pt catalysts significantly enhanced HER performance. </LI> <LI> The prepared Pt catalysts with low loading mass showed excellent performance in PEMWE. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>