사례1: Hurricane Imaging Radiometer (HIRAD)
- Airborne sensor flown on UAEs through hurricanes
- Flown up to 60,000 ft
- Purpose :
- Produces a wide-swath image of ocean surface wind speed
- Measures near surface rain rates
- Power Distribution Unit (PDU)
- Command & Date Handing (C&DH)
- Inertial Navigation System (INS)
- Local Oscillator (LO)
- Controllers (2)
- Receivers (10)
모든 컴포넌트는 최대 power로 작동한다고 설정
열 모델링 목표
- 열모델 구축
- 비행데이터를 사용하여 리시버 온도 보정
- 비행 동안 일정한 리시버온도 유지를 위한 히터 설계
2011 Season flight data
Transient boundary conditions
- 0 hrs: 31 ºC
- 0.5 to 6 hrs: constant -60 ºC
Effective heat loss : heffective = 4.5 W/m2/K
Birk Manufacturing flexible Kapton heaters
– 1.75 x 10 in
– 28 V, 28 W each
Thermal Model Update
- Fiberglass insulation 제거
- Antenna를 두 개로 나눔
- Bracket frame과 chip 추가
- Controller 추가
- Heat set point 위치 수정
2013 version :
- MLI blanket 제거
- heater set temperature real time으로 설정
출처 : Thermal & Fluids Analysis Workshop (TFAWS) 2013, Stephanie Mauro, Kenney Space Center
사례1: Hurricane Imaging Radiometer (HIRAD)
- Produces a wide-swath image of ocean surface wind speed
- Measures near surface rain rates
모든 컴포넌트는 최대 power로 작동한다고 설정
열 모델링 목표
2011 Season flight data
Transient boundary conditions
- 0 hrs: 31 ºC
- 0.5 to 6 hrs: constant -60 ºC
Effective heat loss : heffective = 4.5 W/m2/K
Birk Manufacturing flexible Kapton heaters
– 1.75 x 10 in
– 28 V, 28 W each
Thermal Model Update
2013 version :
출처 : Thermal & Fluids Analysis Workshop (TFAWS) 2013, Stephanie Mauro, Kenney Space Center