INTERNATIONAL DESIGN TEAM 2008 1 Collaborative Conceptual Design of a U.A.V Initial Concept Proposed...

INTERNATIONAL DESIGN TEAM 2008 1

Collaborative Conceptual Design of a U.A.V

Initial Concept Proposed by Virginia Tech and Loughborough University to

meet requirements stipulated by NAVAIR


Background

• Annual collaboration project– Virginia Tech – Loughborough University

• August 2007 – May 2008 • Specified by NAVAIR

http://filebox.vt.edu/users/crluck/Virginia%20Tech%20Logo.jpg


Team MembersVirginia Tech• Robert Briggs• Philip Pesce• Amanda Chou• Anthony Ricciardi• Jessica McNeilus• Erik Sunday• Megan Prince• Ricky Duelley• Belle Bredehoft• Michael Sherman• Alex Kovacic• Dennis Preus

Loughborough University• Daniel Marshall• Daniel Jones• Kris Hanna• Rob Noble• Craig Dillon• Peter Christie• Rob Penn• Steve Bennett• Andrew Courtneidge• Balraj Chand• Ben Hanson• Alex Humphrey


BriefTo design, build and test an unmanned surveillance vehicle, that can perform the

following:

– Cruise speed of 50 kt (knots)– Top Speed of 70 kt– Range of 15 nm (nautical miles)– Minimum endurance of eight hours– Service ceiling of 10,000 ft at half fuel– Normal operational altitude of 3000 ft or 2000 ft above ground level (AGL)– Minimum turn rate of 6 degrees per second– Climb rate of at least 200 ft/min at sea level– Maximum Gross Take-Off Weight (MGTOW) of 300 lbs– Minimum payload of 30 lbs (45 lbs desired)– Payload power source of 10 watts– Noise levels below 50 dBA at 200 ft.– All weather operation with a 10 kt crosswind landing capability– Capable of rail catapult pneumatic launch– Landing within a 50 ft x 250 ft parking lot– Less than one flight failure per 100,000 hours of flight– GPS based autonomous operations – Dynamic re-tasking from ground controllers


Competitors

Outrider 385lbs (175kg)Pioneer 450lbs (204kg)

Shadow 375lbs (170kg) Watchkeeper 430lbs (195kg)

http://www.army-technology.com/projects/watchkeeper/index.html


Methodology

• Virginia Tech– Broke into two groups and developed two

separate concepts.• Loughborough University

– Developed two concepts as a group.• Met, and decided on a concept as a whole.


Concepts

Twin Boom Conventional H-tail

Pylon Mounted Prop


Concepts

• Interchangeable Parts– Standard Wing– Tails– Wing Location– Auxiliary Power


Concepts

• Critical Points– Complexity of Design– Noise– C of G– Safety– Engine Type (Pusher vs. Puller)– Engine Placement

• Thrust Line– Launch & Landing– Propeller Protection– Weight


Downselection

• List Advantages & Disadvantages– Eliminated Twin Tail Boom

• Discussed in Smaller Groups– Chose Pylon– Suggested Modifications


Downselection• Due to:

– Noise– Prop Protection– Diversity of Options– Cooling– Maintenance

• Modifications– Wing Placement– Tractor vs. Pusher– Conventional Tail


Final Concept

• Assembled by Parts– Fuselage & Pylon– Wing Location– Tail & Empennage– Engine Orientation– Undercarriage


Final Concept


General Arrangement


Key

Feat

ures

Good access for maintenance

Large internal fuselage volume

Proven Design

High aspect ratio wing

Modular assembly

Simple structure for design and manufacture


Reliability

• Addressed as a key issue.- 1 or less uncontrolled crashes per 100,000 hours

• Methods to determine Reliability- FMEA/FMECA & FTA

• Fussell-Vessely – prioritises importance of sub-systems


Timeline


Work BreakdownTask Team Member(s)Structures/Manufacturing Rob Penn, Ricky DuelleyPropulsion Daniel Jones, Dennis PreusReliability Erik Sunday, Balraj ChandAerodynamics Anthony Ricciardi, Ben HansonPerformance Steve Bennett, Megan PrinceStability/ Control Andy Courtneidge, Peter Christie, Phil

PesceCAD Alex Kovacic, Alex Humphrey, Michael

ShermanSystems Integration Belle Bredehoft, Rob NobleCosts Jessica McNeilus, Kris Hanna

Ground Support Craig Dillon, Robert BriggsLeadership/Planning Daniel Marshall, Amanda Chou


Questions?

INTERNATIONAL DESIGN TEAM 2008 1 Collaborative Conceptual Design of a U.A.V Initial Concept Proposed...

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