arizona state university autonomous uav project
Post on 02-Jan-2016
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Kyler Marutzky
Motor and Battery Analysis
Objective
Motor capable of powering a 20 lb. aircraft.
Provide enough energy to the motor for a minimum 40 minute flight.
Motor capable of attaining airspeeds of 40 mph.
Motors Considered
ElectricBrushless
Gas2-stroke engine
Why Electric?
Less vibration to the rest of aircraftPhotos are being taken.
Center of gravity doesn’t change throughout flight.
Advancements in RC electric motors have made them very efficient.
Configuration
Pusher Ducted Fan Puller
Chosen for this application
Twin engine
Motor
Hacker A60-16M2276 max Wattage65 max Amperage35 max VoltsFully capable of lifting a 20 lb. aircraft.
Over compensated sizeFuture endeavors.
Type of Battery
Lithium PolymerLight weightCapable of supplying more energy than
NiMH and Cadmium batteries.
Battery Needed
Capable of supplying up to:1500 Watts (~50 Watts/lb., ~20lb aircraft)35 Volts65 Amps
Flight constraints:Capable of supplying enough energy to
sustain a 40 minute flight.Capable of providing enough power to the
motor for 40mph airspeeds.
Battery Chosen
9s3p Lithium Polymer9-3 cell batteries3 cells in series3x3x3 cells in parallel
Cell4.3 Amp/Hour3.7 Volts
Calculations Peak power to motor
Watts = Current * Volts○ Current = 4.3 Amps * 9 = 38.7 A○ Volts = 3.7 * 9 = 33.3V○ Power = 38.7A * 33.3V = 1288 Watts
Duration of flightFlight time = Amperage/(Amperage/Hour)
○ Battery Amperage = 38.7 A/Hour○ Average motor amps = 32.1A○ Flight time = 32.2A/(38.7A/H) = .83 Hours
In-Flight Analysis
Questions?
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