national superior school of mechanics and microtechnics study of a propulsion system for a mini uav...
TRANSCRIPT
National Superior School of Mechanics and Microtechnics
STUDY OF A PROPULSION SYSTEM FOR A MINI UAV - µDRONE PROJECT
Micro-UAV 2004 exhibition
ONERA/DGA COMPETITION
Micro-UAV 2004 Exhibition 2
SUMMARY• Framework
– The ONERA/DGA competition– Particularities of the µdrone
• Propulsion – The propulsive system– Propeller optimization
• Conclusion
Micro-UAV 2004 Exhibition 3
FRAMEWORK
Micro-UAV 2004 Exhibition 4
ONERA/DGA competition
Main performances :
• independence,• simplicity of use,• miniaturization,• innovation,• endurance,• etc…
Micro-UAV 2004 Exhibition 5
ENSMM’s µdrone
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Particularities of the µdrone1 - Propulsion based on two coaxial propellers
Motors
Two propellers
Transmission by spiro-conic gears
Micro-UAV 2004 Exhibition 7
Particularities of the µdrone2 - Autopilot controls speed, trajectory and
UAV stability
Camera
Detection system
Ground station
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Particularities of the µdrone3 - Obstacles detection system
4 transductors
Module inside the streamlined ducted fan
Micro-UAV 2004 Exhibition 9
Particularities of the µdrone4 - Panoramic observation of the environment
using conical mirror
Cameras Conical mirror
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PROPULSION
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Motors
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Batteries
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Coaxial rotor (1/2)
• 16 to 22% more efficient
• 35 to 40% smaller
• T2=0.88*T1
M M
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Coaxial rotor (2/2)
• Gap between propellers : H=D/10
• Spiro-conics gears
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Ducted fan
• Noise reduction
• Venturi effect
• Divergent exit section
• Streamlined outer profile
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Displacement
• Two separated movements
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Propellers optimization
• Goal : meet a specified technical
file
• Methods used : theory of blades element swirl propeller theory
• Matlab programs
• Results and validation
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CONCLUSION
• Last choices
• End 2004 : prototype building
• > January 2005 : tests and adjustment
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ACKNOWLEDGEMENTS
• To the DGA for their financial support
• To the experts and ENSMM teachers for their advice
• And to the former ENSMM teams
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THANKS FOR YOUR ATTENTION