SAE AERO DESIGN PROJECT PROPULSION & TELEMETRY SYSTEMS UNION COLLEGE FLIGHT CLUB Ervin Meneses and Joseph Laub Advisor John Spinelli,Ph.D
SAE Aero Design Team Society of Automotive Engineers Team of five, two EE s and three ME s Regular and Advanced Class Competitions
Regular Class Competition Summary Design, build, and test an R/C aircraft Carry max pay loads within 200 ft runway Max combined L,W,H of 175 inches Electric Propulsion Power limiter (1000W) Scoring Bonus Points Penalties Include Power consumption >1000W Bad take off/landing Design modifications after submitting design Report
OPTIMIZING POWER CONSUMPTION OF SAE AERO AIRCRAFT Ervin Meneses
Design Requirements Project Goals Propulsion Systems Testing Future Work Overview
Design Requirements One single electric motor configuration Use of one COMMERCIAL Li-Po Battery Min. Req. of 3000mAh @ 25C Use of 2015 Power Limiter Install Red Arming Plug
Project Goals Provide the team with an aggressive electric propulsion system (EPS) that complies with SAE Aero Rules and provides more that 11 lbf of thrust Design and implement a P.I controller algorithm that optimize the power consumption of EPS(
2014 EPS
Battery, Propeller, and Motor Selection The
Battery Selection 1lb.6oz 6s 4000mAh 1lb 2oz 6S 3200mAh
3200mAh vs 4000 mah Bateries Add a plot that they perform the same under the 4 minute interval
Transmitted Signal
2015 EPS PWM Analo g Consta nt Power
What is a P.I Controller?
P.I control Algorithm Block Diagram
P.I Control Results But
Data Collection Tools Use of Thrust Test Bed Oscilloscope Current Probe BNC to alligator Clip connector Xplorer GLX Graphing Data Logger Dual Load Cell Amplifier Propell er 17x12E 11.26 18x8 12.57 18x8E 12.97 18x10E 11.69 19x8 12.27 19x10 11.73 20x8E 12.11 20x10E 12.13 Average Thrust (lbf)
Test Bed
17x12E Prop
18x8 Prop
18x8E Prop
Engaging Limiter
Add Crash Picture
Future Work Finish P.I Control Algorithm Order and test other propellers with different pitches Use Ecalc as a reference for future testing Find lighter motor for future use
Questions?
TELEMETRY SYSTEMS FOR THE SAE ADVANCED COMPETITION AIRCRAFT By Joseph Laub Advisor: John Spinelli, Ph.D
Project Goals This year Improving aircraft prototypes Next year Competing in the Advanced Class
Advanced Class Competition The Mission: Drop a three pound humanitarian aid package onto a target from at least 100 feet.
Telemetry System SAE Requirements Real-time altitude at ground station. Record altitude at time of drop. Accurate within one foot. Telemetry must have a first person view (FPV).
Telemetry System Primary Goals Record: Altitude Air Speed Ground Speed Location Time Transmit altitude to ground station. Calculate lead time to target at ground station.
Telemetry System Secondary Goals Overlay altitude and ground speed data on FPV monitor. Accelerometer data. Gyroscopic data. Take off/landing time recorded.
Aircraft 2015 Union College Aero Team Prototype 1
The Brain The fuselage of the aircraft with telemetry package
Data Acquisition System *Power not shown
Data Acquisition System Inter-intergrated circuit (I2C) protocol.
Data Acquisition System System block diagram.
Microcontroller Arduino Mini Pro (3.3 V) ~9x smaller. ~7x lighter
Sensors Altimeter Pressure Temperature Change in Altitude (from pressure) GPS UTC Time Location (latitude and longitude) Ground Speed Airspeed Sensor Air Speed Range Finder Distance from bottom of fuselage to ground.
Data Processed using MATLAB. Air Speed (miles/hour) Fuselage Range Finder (mm) Altitude (feet) Temperature (F) 100 50 Air Speed Plot from file fakeflight.txt 0 0 20 40 60 80 100 120 Time (seconds) Fuselage Range Finder Plot from file fakeflight.txt 400 200 0 0 20 40 60 80 100 120 Time (seconds) Altitude Plot from file fakeflight.txt 20 10 0 0 20 40 60 80 100 120 Time (seconds) Temperature Plot from file fakeflight.txt 65 64.5 64 0 20 40 60 80 100 120 Time (seconds)
Future Work Connect GPS using I2C. Continue testing range of RF communication. Include accelerometer.
Professor John Spinelli Professor James Hedrick Professor Luke Dosiek Professor Bradford Bruno Gene Davison Stan Gorski Lisa Galeo Rodolfo Santana The 2014 Union College Aero Team Acknowledgments
Questions?