Zephyr: A High Altitude Long Endurance Unmanned Air Vehicle ...

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List of AbbreviationsAbbreviationAoAADCa-SiCOTSDCeVFAIFCCFCSGCSGDTGPSHALEISALi-SNASANIOSHPCBUAVUCAVUSAUSDDefinitionAngle of AttackAnalogue-to-Digital ConverterAmorphous SiliconCommercial Off the ShelfDirect CurrentElectron VoltsFédération Aéronautique InternationaleFlight Critical ComputerFlight Control SystemGround Control SystemGround Data TerminalGlobal Positioning SystemHigh Altitude Long EnduranceInternational Standard AtmosphereLithium SulphurNational Aeronautics and Space AdministrationNational Institute for Occupational Safety and HealthPrinted Circuit BoardUnmanned Air VehicleUnmanned Combat Air VehiclesUnited States of AmericaUnited States Dollariv
ContentsChapter 1 - Introduction and BackgroundPage11.1 History of Zephyr Page 31.2 Environmental Issues Page 81.2.1 Air pressure and Densities Page 81.2.2 Temperature Page 91.2.3 Cosmic Rays Page 111.2.4 Mission Envelope Page 12Chapter 2 - Technical Data Page 142.1 Structure Page 142.2 Power Page 142.3 Propulsion Page 172.4 Avionics Page 182.5 Ground Control System Page 202.6 Payload Page 222.7 Safety Cut Down System Page 232.8 System Performance Page 25Chapter 3 - My Projects Page 263.1 Radiosonde Page 263.2 NIOSH Lifting Equation Page 293.2.1 Variables Page 313.3 Airspeed Sensor Page 353.3.1 Calibration Page 353.3.2 Accuracy Page 353.3.3 Built in Errors Page 363.3.4 Operation Page 363.3.5 Zener Diode Page 363.4 Payload Page 403.4.1 GPS Signal Page 41v
Page 1 and 2: Zephyr:A High Altitude Long Enduran
Page 3: AcknowledgementsI’d like to thank
Page 7 and 8: Chapter 1Introduction and Backgroun
Page 9 and 10: 1.1 History of ZephyrZephyr is a li
Page 11 and 12: The Zephyr 5 project continued with
Page 13 and 14: airframe, with the main aim to impr
Page 15 and 16: 1.2 Environmental IssuesDuring the
Page 17 and 18: order to function, they may not thu
Page 19 and 20: 1.2.3 Cosmic RaysCosmic rays are en
Page 21 and 22: wind speeds. This is to ensure that
Page 23 and 24: crystalline silicon cells and can b
Page 25 and 26: which are then insulated. In order
Page 27 and 28: motion of the aircraft including ro
Page 29 and 30: Within the portable cabins the crew
Page 31 and 32: Simple payloads instructions withou
Page 33 and 34: In the event that the wing does not
Page 35 and 36: Graph 4 shows radiosonde density da
Page 37 and 38: 3.2 NIOSH Lifting EquationThe hand
Page 39 and 40: Variable Description MultiplierD (c
Page 41 and 42: Using the given values, the corresp
Page 43 and 44: 3.3 Airspeed SensorThe current airs
Page 45: 12VSensorPCBZenerDiodeFigure 8. Dia
Page 48 and 49: 3.4 PayloadThe payload is the carry
Page 50 and 51: where λ is the wavelength, c is th
Page 52 and 53: 3.5 Angle of Attack SensorThe angle
Page 54 and 55:
The magnetic sensor seemed much mor
Page 56 and 57:
Chapter 4Angle of Attack Experiment
Page 58 and 59:
The sensor was powered using an ext
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It has to be noted however, that on
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experience the atmospheric conditio
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5.2.1 Aerial PhotographyThe most co
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meaning that these cameras can be u
Page 69 and 70:
Infoterra have a project called Far
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it out for long endurance missions.
Page 73 and 74:
Figure 18. QinetiQ’s Zephyr5.4 Co
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where it is needed rather than havi
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Appendix 3Schematic diagram of the
Page 79 and 80:
Appendix 5The results table for the
Page 81 and 82:
BibliographyQinetiQ Documents[1] St
Page 83:
[19] Encyclopedia Britannica, 2004.
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