11/26/08 wedteam #4 design of unmanned aircraft system(uas) 032748 선 진 성 032776 유 태 석...
TRANSCRIPT
11/26/08 Wed Team #4
Design of Unmanned Aircraft System(UAS)
032748 선 진 성 032776 유 태 석 032789 이 선 민 032791 이 세 동 032794 이 영 신 032821 정 우 진
Contents
Contents
1. Scenario
2. Overview
3. Requirement
4. Parametrics
5. Conclusion
1. Scenario
Korea Sejong Unv.Dr. Kyung-Tae Lee
Emergency Phone Call
USA CIA USA FAA
USA 엔지니어들이 이라크에 납치당했네 도와주게 ..
Dr. Lee
사정이 딱하니 우리 학생들이 도와드리죠
우리가 원하는 건 중고도급 정찰 및 다목적 UAV 일세 요구조건을 보여주시오
Scenario
저공 비행
가벼운 기체
뒤쳐지지 않는 성능
Requirement
Scenario
USA FAA – KOR SEJONG UNIV JOINT
Scenario
Sejong Unv.Best of Best Team
SystemSystem
WeightWeight Configuration
Configuration Sub-SysSub-Sys ElectronicElectronic Performan
cePerforman
ce
너희가 최고다 !
Scenario
▷ Start [MQ-1 Predator Development]
Aerospace Research Institute : Choong moo gwan
2 . Overview
MQ-1 Predator
Overview
Specification
Overview
1 . Synthetic Aperture Radar (SAR) Antenna 2 . Inertial Navigation System/GPS 3 . Ku-Band Satellite Communications Antenna 4 . Video Cassette Recorder 5 . GPS Antennas (Left and Right) 6 . APX-100 Identification Friend or Foe Transponder 7 . Ku-Band Satellite Communications Sensor Processor Modem Assembly 8 . C-Band Upper Omnidirectional Antenna Bracket 9 . Forward Fuel Cell Assembly 10 . Aft Fuel Cell Assembly 11 . Accessory Bay 12 . Engine Cooling Fan 13 . Oil Cooler/Radiator 14 . 914F Engine 15 . Tail Servo (Left and Right) 19 . Aft Equipment Bay Tray 20 . Secondary Control Module 21 . Synthetic Aperture Radar Processor/AGM-114 El ectronics Assembly 22 . Primary Control Module 23 . Front Bay Avionics Tray 24 . ARC-210 Receiver/Transmitter 25 . light Sensor Unit 26 . Video Encoder 27 . De-ice Controller 28 . Electro-Optical/Infrared Sensor/AN/AAS-52(V)1 Electronics Assembly 29 . Front Bay Payload Tray 30 . Ice Detector 31 . SAR)Receiver/Transmitter 32 . Nose Camera Assembly
Overview
[ 주요 특징 ] 1 . 밤낮 상관없이 고정밀 촬영 가능 2 . Hellfire missile 을 위한 레이저 표시 제공
AN/AAS-52
Multi-Spectral Targeting System
Overview
[ 주요 특징 ]
1. small volume , light weight 2. supports all-weather
3. low power
TESARTactical Endurance Synthetic Aperture Radar
Overview
TESAR SYSTEM
Overview
AGM-114 Hellfire missile
[ 주요 특징 ]
1 . 대전차 미사일 ( 대함용도 있음 )
2 . 주로 헬기에서 사용
Overview
Communication
Pre-conceptual design
3. Requirement
Requirement Ex ) Preconcept
저공비행
1 . 대부분의 지대공 missile → 3~6km → 최소 7km 이상은 되어야 하겠다 ex) 미스트랄 - 3km 스팅어 - 3.5km
2 . 일단 대류권이 좋겠다
가벼운 기체1 . 최신 복합체를 쓸 수는 없고 최대한 크기를 작게 해야겠다 . → 동시대의 UAV 비교 .
뒤쳐지지 않는 성능
1 . 최소 24 시간
2 . supports all-weather → (using TESAR 용 )
3 . 공격 능력까지 추가되면 어떨까 ?
Oh! Parametrics.. God dammit!
4 . Parametrics
Range
propulsion Weight
performance
Parametric 의 순서
Configuration
4 . Parametrics
Range
4 . Parametrics
From requirement
Range
Range 400nm=740km
Altitude 7km = 23ft
Static pressure ratio( )
0.3966
Temperature ratio( ) 0.9044
Density ratio( ) 0.4386
Pa 839.2929lb/ft^2
Block time_loiter 22hr
Block speed_loiter 33km/h
1962 U.S. Atmosphere
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0 50 100
Altitude (Kft)A
mbi
ent/S
ea L
evel
Rat
io Pressure (delta)
Temperature (theta)
4 . Parametrics
Engine
4 . Parametrics
● Engine(ROTAX 914)
4 . Parametrics
Weight
4 . Parametrics
4 . Parametrics
4 . Parametrics
1 . Fuselage , wing , tail 각각의 wetted area 도출 . 2 . (Drag , lift )max 및 (L/D)max 도출 .
3 . 전체적인 항공기 형상 도출 .
Configuration
4 . Parametrics
1 . Fuselage
a . 원형 실린더 모양을 기초로 설계 시작 = > how to choice of length and span length ?
b . IC Engine 의 Vmax = 120kts => length to span ratio = 약 0.6 ~ 0.7
c . Length = 30 , span length = 48
=> length to span ratio = 0.625
L = 30 ft , D = 3ft Swet_fuselage = (3.14*(L/D))*D^2 = 282 . 7433
Length to span ratio
0.0
0.5
1.0
1.5
2.0
2.5
0 300 600 900 1200
Vmax (Kts)
SideView
L EndView
D
4 . Parametrics
2 . Wing and tails
Swet_wing = 2*(0.9*Sref) = 225
Sref = 125 => 면적을 이용하여 날개 형상 생각
1 1.6
48ft
Swet_vt = 37.5 , Swet_ht = 62.5=> 절반의 합력 계산 = > Swet_angular=36.4434*2 = 72.8869
total Swet_tail = Swet_angular+Swet_vt = 72.8869+37.5 = 110.3869
Total Swet = 282.7433+225+110.3869 = 618.1302
Cfe 0.004
e 0.8
AR 18.432
Cd.Max 0.0349
Cl.Max 0.899
(L/D)max 25.7636
(L/D) 23.1872
4 . Parametrics
wing loading = 2241.51/125 = 17.93 Waf/Sref = 4.5
TREND 에 만족 !! Wetted AR = 48^2/618.1302 = 3.727 (L/D)max = 25.7636
Regional Turboprops(airframe structure only - Roskam)
5
10
15
20
25 35 45 55
GTOW/Sref (psf)
Waf
/Sre
f (ps
f)
Maximum L/D trends
0
5
10
15
20
25
30
35
0 2 4 6 8
Wetted AR = b 2̂/Swet
(L/D
)max
Manned aircraftGlobal Hawk (est)
4 . Parametrics
3 . Model
L , D 동일 . L1 = 3 , L2 = 6
Reduce of Total Swet !!
LL1 L2
D
L , D L , D , L1 , L2
Swet of fuselage 282.7433 251.6772
Swet of wing 225 230.9946
Swet of tails 110.3869 110.3869
Total Swet 618.1302 593.0586
4 . Parametrics
4 . Engine 의 위치
Tractor 방식이 아닌 Pusher 방식 .
장점 : 표면 마찰 항력 및 wetted area 를 줄인다 .
단점 : 랜딩 기어가 길어야 함 .
5 . Inverted V-tail 선정
장점 : Roll-yaw coupling 현상 제거 단점 : 지면 여유가 적음
4 . Parametrics
6 . 전체적인 3 면도
4 . Parametrics
Performance
4 . Parametrics
Engine start and taxi : 20 min at idle power (fuel flow=0.1*WdotF0)Takeoff : 1 min at maxium power (fuel flow=WdotF0)
-Initial data
W0 Sref Bhp/W0 SFC0 Swet
2241 lb 123.3 ft^2 0.05 0.47 587.2
FF L/Dmax AR Cfe E
0.29 24 18 0.0045 0.8
Take off performance
Vto Vs W3 Prop TOP D_to BFL
58.92 kts 53.57 kts 2196.18 lb
253.51 1851.05 ft
3127 ft
4 . Parametrics
Climb 2
Vclimb2 D Ta SFC WdotF ROC TTC
149.4 fps
90.3 lb 94 lb 0.47 43.24 lb/h
10.1 fpm 2470 min
Climb 1
Vclimb1 D Ta SFC WdotF ROC TTC
99.52fps 91.5 lb 375.25 lb
0.47 52.44 lb/h
770.82 fpm
32.43 min
Average climb
Vclimb WdotF ROC TTC Dclimb
74.4 fps 47.84 lb/h 390.5 fpm 64min 78.4 nm
4 . Parametrics
Initial cruise start at 25K ft altitude
W4 Vcr
2145 lb 80 kts
Lending weight
W19
1623 lb
Total Range
RF Rcr Dcilmb R
13301 nm 1610nm 78.41 nm 1688.41nm
5 . Conclusion
FAA Sejong Univ.
Pre-conceptDesign
Iteration Data
Selecting Data
MQ-1 Predator Development
Feedback
Reference
1 . Lecture note2 . Road map3 . http://en.wikipedia.org/wiki/MQ-1_Predator4 . http://science.howstuffworks.com/predator.htm/printable5 . http://www.fas.org/irp/imint/tesar.htm6 . http://www.hansfamily.kr/438 7 . http://www.pagefarm.net/wiki/index.php?title=The_CIA's_Role_in_the_War_on_Terror#MQ-1_Predator8 . http://www.air-attack.com/videos/53/page/2#http://www.youtube.com/watchwatch?v=LTPHdLNcPUc 9 . http://www.vectorsite.net/twuav_13.html#m2 10 . http://www.americanspecialops.com/cia-special-operations/ 11 . www.dtic.mil/ndia/2005expwarfare/hastert.pdf 12 . Jane’s book13 . http://www.rotaxservice.com/rotax_engines/rotax_914UL.htm14 . http://www.fas.org/irp/program/collect/gnat-750.htm15 . http://en.wikipedia.org/wiki/General_Atomics_GNAT16 . http://science.howstuffworks.com/predator.htm/printable17 . http://www.airforce-technology.com/projects/predator/18 . http://www.air-attack.com/videos/53/RQ-1-Predator.html19 . http://kr.youtube.com/watch?v=Tirfa7Ng78s20 . http://www.zibb.com/aerospace/theme/aircraft/MQ-1+Predator+%2F+RQ-1+Predator+A21 . http://www.airforce-technology.com/projects/predator/predator6.html22 . http://www.militaryaircraft.de/pictures/military/aircraft/MQ-1/MQ-1.html23 . http://inventors.about.com/library/inventors/blRQ_1_Predator_Unmanned.htm24 . http://www.gruntsmilitary.com/rq1.shtml25 . http://www.army-technology.com/projects/predator/specs.html
Thank you
Q&A