Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Research to Predict the Thermal Characteristics of Electro Hydrostatic Actuator for Aircraft

항공기용 전기-정유압식 작동기(Dual Redundant Asymmetric Tandem EHA)의 열특성 예측을 위한 연구

  • Kim, Sang Seok (Space & Aeronautics Development Center, Aerospace Engineering Department, Hanwha Aerospace) ;
  • Park, Hyung Jun (Space & Aeronautics Development Center, Aerospace Engineering Department, Hanwha Aerospace) ;
  • Kim, Daeyeon (Space & Aeronautics Development Center, Aerospace Engineering Department, Hanwha Aerospace) ;
  • Kim, Dae Hyun (Space & Aeronautics Development Center, Aerospace Engineering Department, Hanwha Aerospace) ;
  • Kim, Sang Beom (Space & Aeronautics Development Center, Aerospace Engineering Department, Hanwha Aerospace) ;
  • Lee, Junwon (Space & Aeronautics Development Center, Aerospace Engineering Department, Hanwha Aerospace) ;
  • Choi, Jong Yoon (1st Directorate, Aerospace Technology Research Institute, Agency for Defense Development)
  • 김상석 (한화에어로스페이스(주) 항공우주연구소 우주항공R&D센터) ;
  • 박형준 (한화에어로스페이스(주) 항공우주연구소 우주항공R&D센터) ;
  • 김대연 (한화에어로스페이스(주) 항공우주연구소 우주항공R&D센터) ;
  • 김대현 (한화에어로스페이스(주) 항공우주연구소 우주항공R&D센터) ;
  • 김상범 (한화에어로스페이스(주) 항공우주연구소 우주항공R&D센터) ;
  • 이준원 (한화에어로스페이스(주) 항공우주연구소 우주항공R&D센터) ;
  • 최종윤 (국방과학연구소 항공기술연구원 1부)
  • Received : 2022.02.07
  • Accepted : 2022.05.16
  • Published : 2022.06.30
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Abstract

The electro-hydrostatic actuator (EHA) recently has been used in flight control fields for aircraft because of its benefits of minimizing oil leakage and weight, improving safety, and etc. while independently operating the hydraulic power source and eliminating complex hydraulic piping. The aircraft of which EHA is installed inside, has the thermal management issue of EHA, because of its limited cooling source as compared with the aircraft which installs the traditional central hydraulic system. So, the thermal analysis model which predicts the thermal characteristics of EHA, is required to resolve this thermal management issue. In this study, an oil circulation circuit inside the hydraulic power module comprised of hydraulic pump and electrical motor for EHA was applied. This is for the purpose of developing the internal rotary group of hydraulic power module, which operates under the conditions of high rotation speed and hydraulic pressure. After formulating an appropriate thermal analysis model, the thermal analysis results with oil cooled or no oil cooled hydraulic control module were compared and reviewed, for the purpose of predicting the thermal characteristics of EHA.

전기-정유압식 작동기(EHA)는 독립적으로 유동력원을 운용함에 따라, 복잡한 유압 배관을 제거할 수 있어 누유 및 중량 최소화, 안전성 향상의 장점이 있어 최근 항공기용 비행제어 분야에서 사용되고 있다. 이러한 EHA를 탑재하는 항공기의 경우, 기존 중앙 유압시스템을 탑재한 항공기에 비해 제한된 냉각원에 따른 EHA의 열관리 이슈가 대두된다. 이러한 열관리 이슈의 해결을 위해서는, EHA의 열특성을 예측할 수 있는 열해석 모델이 필요하다. 본 연구에서는 유압펌프 및 전기모터로 구성되는 EHA 유압동력모듈의 내부 회전체를 고압 하에서 고속으로 회전이 가능하도록, 유압동력모듈 내부에 유체 순환 회로를 적용하였다. 적합한 열해석 모델을 구축하고, 유냉식 또는 비유냉식 유압동력모듈 적용에 따른 해석 결과의 비교 및 검토를 통해 EHA의 열특성 영향성을 확인하고자 하였다.

Keywords

Acknowledgement

해당 논문은 국방과학연구소 '19년 산학연 주관 핵심기술(시험개발) 연구개발과제 "Electro-Hydrostatic 엑츄에이터(EHA) 개발"의 일환으로 수행된 것입니다.

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