Energy characterization of a transformable solar-powered unmanned aerial vehicle

Given the wide variety of flight conditions typically encountered by fixed-wing aerial vehicles, the flight performance of a solar-powered unmanned aerial vehicle (SUAV) depends on many factors. Predicting the performance for a given application requires characterization of both system and environmental components. Furthermore, a SUAV with a transformable airframe increases the number of characterizable states, where each state features a unique set of capabilities. This results in significant differences with respect to power consumption, solar panel orientation, and increases the design limitations on system components. This paper characterizes the energy collection, propulsion, and power electronics subsystems of a transformable SUAV developed at the University of Minnesota. Clear-sky and solar panel models are used to predict the power available for a given location and time. Propulsion system design is validated with flight data, and a proposed model correlates propulsion limits with available energy. Power electronics are modeled and simulated to determine hardware and tracking algorithm efficiencies. Finally, a pulsed battery charging methodology is implemented in hardware and evaluated against conventional charging techniques.

[1]  W. Marsden.  I and J , 2012 .

[2]  P. Ineichen.  A broadband simplified version of the Solis clear sky model , 2008 .

[3]  Ursula Eicker,et al.  Solar technologies for buildings , 2003 .

[4]  Nikolaos Papanikolopoulos,et al.  SUAV:Q - a hybrid approach to solar-powered flight , 2016, 2016 IEEE International Conference on Robotics and Automation (ICRA).

[5]  A. Kapoor,et al.  Exact analytical solutions of the parameters of real solar cells using Lambert W-function , 2004 .

[6]  Mohammad Hassan Moradi,et al.  A hybrid maximum power point tracking method for photovoltaic systems , 2011 .

[7]  William A. Beckman,et al.  Improvement and validation of a model for photovoltaic array performance , 2006 .

[8]  S. Wilcox,et al.  Users Manual for TMY3 Data Sets (Revised) , 2008 .

[9]  D. Linden.  Handbook Of Batteries , 2001 .

[10]  M. Vitelli,et al.  Power Electronics and Control Techniques for Maximum Energy Harvesting in Photovoltaic Systems , 2012 .

[11]  Ursula Eicker.  Solar Technologies for Buildings: Eicker/Solar Technologies for Buildings , 2005 .

[12]  Majid Jamil,et al.  A comparison of photovoltaic maximum power point techniques , 2015, 2015 Annual IEEE India Conference (INDICON).

[13]  W. Beckman,et al.  Solar Engineering of Thermal Processes , 1985 .

[14]  Julien Eynard,et al.  Clear-sky Irradiance Model for Real-time Sky Imager Application , 2015 .

[15]  Joshua S. Stein,et al.  PVLIB Python 2015 , 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC).

[16]  Mohammad Hassan Moradi,et al.  Classification and comparison of maximum power point tracking techniques for photovoltaic system: A review , 2013 .

[17]  Nikolaos Papanikolopoulos,et al.  Design and experiments for a transformable solar-UAV , 2017, 2017 IEEE International Conference on Robotics and Automation (ICRA).

[18]  Nikolaos Papanikolopoulos,et al.  SUAV:Q - An improved design for a transformable solar-powered UAV , 2016, 2016 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS).

[19]  Atsushi Konno,et al.  Development of a quad rotor tail-sitter VTOL UAV without control surfaces and experimental verification , 2013, 2013 IEEE International Conference on Robotics and Automation.

[20]  Fahmida Naznin.  State of Charge (SOC) Governed Fast Charging Method for Lithium Based Batteries , 2013 .

[21]  Roland Siegwart,et al.  Perpetual flight with a small solar-powered UAV: Flight results, performance analysis and model validation , 2016, 2016 IEEE Aerospace Conference.

[22]  Thuwaragan Sritharan,et al.  Impact of Current Waveforms on Battery Behaviour , 2012 .

[23]  Clayton R Green.  MODELING AND TEST OF THE EFFICIENCY OF ELECTRONIC SPEED CONTROLLERS FOR BRUSHLESS DC MOTORS , 2015 .

[24]  U. Landau,et al.  Rapid Charging of Lithium-Ion Batteries Using Pulsed Currents A Theoretical Analysis , 2006 .

[25]  Min Chen,et al.  Accurate electrical battery model capable of predicting runtime and I-V performance , 2006, IEEE Transactions on Energy Conversion.

[26]  Mark D. Moore,et al.  Benefits of Hybrid-Electric Propulsion to Achieve 4x Cruise Efficiency for a VTOL UAV , 2013 .