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MICRO AIR VEHICLES

INTRODUCTION
¢ SMALL AIR CRAFTS
¢ USES DIFFERENT LIFT GENERATING MECHANISM
¢ MECHANISM MIMICKS THE FLIGHT OF INSECT ENCARISA FORMOSA
¢ FOUNDED FROM NATURE

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Guided By,
PRAMOD RAMAKRISHNAN (Lecturer,Dept.of Mech.Engg )

Done By,
ANOOP A S

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A KIND OF MAV


COMPARISON WITH OTHER
AIR VEHICLES


BENEFITS THAN ORDINARY
AIR CRAFTS
¢ WEIGHT IS VERY SMALL (50 grams)
¢ SIZE IS ABOUT 15-30 CENTIMETERS
¢ IT CAN BE HOVERED
¢ CAN BE PASS THROUGH SMALLER AREAS

FUNCTIONS OF MAV
¢ USED FOR TAGGING,TARGETING
¢ COMMUNICATIONS
¢ HELPS SOLDIERS
¢ USED FOR MISSIONS IN CANYONS,INTERIOR OF BUILDING Etc
¢ SURVEILLANCE
¢ RESCUE OPERATIONS

¢ TRAFFIC MONITORING
¢ WILD LIFE SURVEYS
¢ POWER LINE INSPECTION
¢ AERIAL PHOTOGRAPHY

TRACKING BY MAV

TECHNICAL CHALLENGES
¢ ALL THE SYSTEMS BASED ON MICRO ELECTRONICS
¢ FLIGHT CONTOL IS DIFFICULT
¢ STABILISATION AND GUIDANCE REQUIRE HIGLY AUTONOMOUS CONTROL SYSTEMS
WINGS
¢ IMITATES THE INSECT ENCARISA FORMOSA
¢ FLAPPING WINGS
¢ WINGS HELPS HOVERING
¢ THE LIFT IS PROPORTIONAL TO
WING AREA AND SQUARE OF VELOCITY
WING CHARACTIRISTICS
LIFT IS GENERATED BY
*AIR FLOW BY VEHICLE SPEED
*WING FLAPPING TO SUPPORT -
VEHICLE SPEED
IT CAN BE OPERATED AT VERY LESS VEHICLE SPEED

WIES FOGH'S 2-D MODEL

(a) (b) © (d)
(e) (8 00

a-b clapped together; c-e starts opening; f-h separation
FLAPPING MECHANISM

O2
ANALYSIS
¢ IN FLYING MECHANISM IMBALANCES ARE DAMPED DUE TO VISCOUS INTERACTIONS IN THE LOW
REYNOLDS NUMBER REGIME
¢ ALL HORIZONTAL FORCES CANCELLED BY OPPOSITELY WORKING MECHANISMS FOR THE 2 WINGS

ESTIMATED LIFT
¢ LIFT IN TERMS OF LIFT COEFICIENT,CL CL= (1.38 Wc)/U,WHERE W=ANGULAR VELOCITY OF THE WING c=CHORD LENGTH U=FORWARD VELOCITY

FUTURE WORK
¢ REDUCE THE WEIGHT
¢ ACHIEVE MORE STABILIZATION
¢ MINIMIZE SIZE
¢ INCREASE SPEED
¢ MAXIMIZE BATTERY LIFE
CONCLUSION
¢ NEW DEVELOPING TECHNOLOGY
¢ DERIVED BY OBSERVING NATURE
¢ NEW MECHANISM FOR WINGS
¢ FLAPPING DOES'NT GENERATE SUFFICIENT LIFT

THANK YOU