Micro Air Vehicles

Micro Air Vehicles - Micro Air Vehicles Micro Air Vehicles...

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Unformatted text preview: Micro Air Vehicles Micro Air Vehicles Josh Bock Eric Eagon Brian Enlow John McKinnis Colleen Rainbolt AAE 490 T Spiral 1 Presentation, February 7, 2004 Background Background • What is a Micro Air Vehicle (MAV)? – Fully functional plane – < 6 inch dimension – Aerial robot • What are MAV’s used for? – – – Bio­chemical sensing Surveillance Dangerous environments Current MAV Problems Current MAV Problems • Short flight times – Low battery life • Control Issues – Unpredictable forces and moments – Wind gusting • Limited space – Controls – Power source Project Goals Project Goals • First Spiral • – Design model – Build glider – Add weights – Flight test to L/D = 5 Overall Project Goals – Create 6 inch MAV – Establish working controls – Remote control flight Conceptual Design “Kolibri” “Kolibri” Vitals Component Kolibri Wing Span 30 in Chord 9 in Fuse Length 23 in Loaded Weight 29.4 g Estimated Lift 0.065 lbf Estimated Drag 0.01lbf Theoretical L/D 5.44 Our Design Glider 1 Glider 1 & Glider 2 Vitals Component Glider 2 Wing Span 12 in 6 in Chord 6 in 3 in Fuse Length 18 in 9 in Horiz Tail Depth Glider 2 Glider 1 2 in 1 in Horiz Tail Width 6 in 3 in Vertical Tail Height 2in 1 in Estimated Loaded Weight 75 g 37.5 g Estimated Lift 0.165 lbf 0.083 lbf Estimated Drag 0.03 lbf 0.015 lbf Theoretical L/D 5.5 5.5 Build Build Materials: • 1mm Piano Wire • Spider Modeling Glue • Insta-Set Glue Catalyst • Floral Wax Paper • Balsa Wood • AAA Battery • Pennies • Cost: < $20 Testing : Trial 1 Testing • Site: Lambert Fieldhouse – Launch height : 18 ft – Distance Goal for L/D = 5 : 90 ft • Unsuccessful for both planes – Planes too unstable; circling, driving – Hard landing broke structure Testing : Trial 2 Testing • Launch height : 6 feet • Distance Goal : 30 feet – Gives L/D = 5 Larger Plane Small Plane (12" wingspan) (6" wingspan) Launch height Distance 6 ft 6 ft L/D = X/H 15 ft (Low flight to 30 ft) 30 ft (Soft landing) L/D = 5 L/D = 5 Testing : Trial 3 Testing Large Plane Small Plane (12" wingspan) (6" wingspan) 6 ft 6 ft Flight distance 10 ft (Crash) 31 ft L/D 1.6 5.16 Launch Height Testing Issues Testing Issues • • • Weight placement on fuselage Stability Friction from floor Numbering system Numbering system • xx_xx_xxx_xxx – 10 digit numbering system • File Type xx_xx_xxx_xxx – Describes file format • Location xx_xx_xxx_xxx – Describes part location • Description / Part Type xx_xx_xxx_xxx – Type of part or file • Sequential Number xx_xx_xxx_xxx – Ordered part number per type. • • • • • • • • • • Engineering Change Request Engineering Change Request Date/Time: Part Number (xx_xx_xxx_xxx): Description of Part: Requested by: Estimated Date Needed: Requested Change: Reason for Change: Design Engineer in Charge of Change: Completed [Yes/No] Save completed ECR form in main directory. Save the file using the following convention: ECR_001.doc, ECR_002.doc, ECR_003.doc, etc. Part Explorer 1.0 Home Grown Part Explorer 1.0 Home Grown PDM Part Database Report Part Database Report Conclusion Conclusion • Designed and built working model • Tested model – Achieved L/D = 5 • Designed and created working PDM system Future Planning Future Planning • Plane Problems – – – Low L/D Control issues Unstable structure • Solutions – New compact design • Foam Wing, wood tail • All foam design – Working control system • Remote Control Flight • PDM Problems • – Implementation Solutions – Teaching session with group – Time ...
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