Energy optimal path planning of an unmanned solar powered aircraft

Pınar, Erdem Emre
In this thesis, energy optimal route of an unmanned solar powered air vehicle is obtained for the given mission constraints in order to sustain the maximum energy balance. The mission scenario and the constraints of the solar powered UAV are defined. Equations of motion are obtained for the UAV with respect to the chosen structural properties and aerodynamic parameters to achieve the given mission. Energy income and loss equations that state the energy balance, up to the position of the UAV inside the atmosphere are defined. The mathematical model and the cost function are defined according to the mission constraints, flight mechanics and energy balance equations to obtain the energy optimal path of the UAV. An available optimal control technique is chosen up to the mathematical model and the cost function in order to make the optimization. Energy optimal path of the UAV is presented with the other useful results. Optimal route and the other results are criticized by checking them with the critical positions of the sun rays.


Design of a solar powered unmanned airship
Sönmez, Onur Sinan; Alemdaroğlu, Hüseyin Nafiz; Department of Aerospace Engineering (2015)
This thesis presents the design and analysis of a low altitude, high endurance Unmanned Airship which is capable of carrying payloads up to 70 kg to 1000 meters altitude. This UAV has an endurance of 2 weeks and can resist winds up to 90 km/h. It is completely solar powered and it uses Helium as the lifting gas and uses electric motors to change it’s location. The purpose of this thesis is to design an unmanned, completely solar powered airship to be used for various missions such as: reconnaissance mission...
Modeling and financial analysis of a solar-biomass hybrid power plant in Turkey
Özdemir, Merve; Yozgatlıgil, Ahmet; Department of Mechanical Engineering (2017)
Solar thermal and biomass combustion systems can be hybridized via a Rankine cycle to have a continuous electricity generation and lower CO2 footprint. Disadvantages of these two renewable technologies can be overcome by hybridization. In this work; we develop a simulation model for Rankine cycle based, solar-biomass hybrid power plants using the ASPEN PLUS software. Solar parabolic collectors and biomass combustion are arranged in parallel to produce steam for power generation. Using the simulation model; ...
Numerical investigation of circulating fluidized bed riser hydrodynamics for concentrating solar thermal receiver applications
Bilyaz, Serhat; Tarı, İlker; Department of Mechanical Engineering (2015)
Various heat transfer fluids and thermal storage materials are considered for concentrating solar power systems to improve the storage capability of the system which compensates the fluctuating behavior of the solar resources. Solid particles can be a good alternative since they have high sensible heat capacity. In addition, they are cheap, environmentally benign and chemically and mechanically stable at high temperatures. In this thesis, hydrodynamics of circulating fluidized bed solar receiver was numeric...
Conceptual design of a hybrid (turbofan/solar) powered HALE UAV
Mermer, Erdinç; Özgen, Serkan; Department of Aerospace Engineering (2016)
The aim of the thesis is to design a HALE UAV using both turbofan engine and solar energy in order to obtain 24 hours endurance with 550 lb payload capacity and 30000 ft service ceiling. During daytime, required power is obtained from solar panels. However, excess solar energy is used for charging the lithium-ion battery. It is assumed that turbofan engine is used only for climbing to the required altitude. During loiter, only solar energy and battery power are used. The design methodology consists of two m...
Ozcan, Guclu; Alemdaroglu, Nafiz (2015-06-12)
This paper is about solar irradiation estimation on a solar powered UAV over its mission course [1]. Solar irradiation estimation and maximizing the solar energy collection are critical for solar powered UAVs and their performance. In this paper main focus is on solar irradiation calculations and comparison of two possible flight paths for solar energy collection during a transport or inspection mission.
Citation Formats
E. E. Pınar, “Energy optimal path planning of an unmanned solar powered aircraft,” M.S. - Master of Science, Middle East Technical University, 2013.