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

More documents

Recommendations

Info

navigation via GPS, and ground track following waypoint navigation. All arecontrollable from the GCS through the transmission of new angle of attack/pitch/roll,heading or waypoint commands as appropriate. Rate of climb is always controlledmanually from the GCS via the motor power demand. The flight crew monitors theaircraft 24 hours a day and manual override of the automatic flight control system ispossible at anytime from the ground in case it needs to be used, but in practise theaircraft is usually flown by the autopilot.Forward looking pilot cameras onboard the aircraft are used to assist in take-off andlanding, to detect the horizon and cloud details during day and night. These camerashelp to assist the pilot in navigation and help to monitor the FCS performance.2.5 Ground Control SystemThe Ground Control System, GCS, consists of a group of ground antennas andportable cabins from which the aircraft is controlled. The primary systems found inthe cabins are a Ground Data Terminal (GDT), Flight Critical Computer (FCC) and asystem of computers operating via a Local Area Network for increased command,control and mission planning ability. The antenna systems, GDT and FCC are theonly flight critical components necessary for maintaining control of the aircraft andtherefore a completely separate duplicate system is running in case there is a failurewith one of the critical components. An uninterruptible power supply ensures that ifthere was a temporary loss of main electrical power to the GCS, it will not jeopardisethe mission.22
Within the portable cabins the crew control and monitor the flight of <strong>Zephyr</strong> throughthe following 6 crew positions;UAV Commander;Pilot;Flight Engineer;Navigator/Meteorology Analyst;GCS engineer;Payload operator.The UAV commander is a qualified and competent person who is in charge of theentire operation, including launch, flight and recovery. They may either be in directcontrol of the aircraft (i.e. undertaking the role of the pilot), working jointly with thepilot, or monitoring the state and progress of the air vehicle. In addition to being incharge of the aircraft, the UAV commander ensures that all range ground control andair traffic control instructions are followed promptly, and that <strong>Zephyr</strong> remains withinthe designated airspace.The pilot flies the aircraft when in manual mode via a conventional pilot control boxby sending information to the aircraft. The pilot uses telemetry data, a forwardlooking camera for horizon indication and a real-time moving map showing GPSposition to help maintain situational awareness both when the aircraft is beingmanually controlled and in autopilot.23
Page 1 and 2: Zephyr:A High Altitude Long Enduran
Page 3 and 4: AcknowledgementsI’d like to thank
Page 5 and 6: ContentsChapter 1 - Introduction an
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: motion of the aircraft including ro
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
Page 60 and 61: It has to be noted however, that on
Page 62 and 63: experience the atmospheric conditio
Page 65 and 66: 5.2.1 Aerial PhotographyThe most co
Page 67 and 68: meaning that these cameras can be u
Page 69 and 70: Infoterra have a project called Far
Page 71 and 72: it out for long endurance missions.
Page 73 and 74: Figure 18. QinetiQ’s Zephyr5.4 Co
Page 75 and 76: where it is needed rather than havi
Page 77 and 78: 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.
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?