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    Analyzing the effects of different MPPT algorithms on lithium-ion battery degradation
    (American Institute of Aeronautics and Astronautics Inc, AIAA, 2023) Cinoğlu, Bahadır; Küçükkör, Özge; Karakoç, Hikmet; Durak, Umut
    For a continuous flight, providing required power at the optimum level and maintaining battery health all the time is a critical issue that needs to be handle delicately. Since the efficiency of the maximum power is provided by the PV panel is directly related to the Maximum Power Point Tracking (MPPT) algorithms, each of these algorithms may also have an effect on the State of Charge (SOC) and State of Health (SOH) parameters of the battery. In this study, an MPPT model is simulated in order to determine how different algorithm’s efficiency effect the battery health.
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    Comparison of MPPT algorithms under different environmental conditions for solar powered high altitude platforms
    (American Institute of Aeronautics and Astronautics Inc, AIAA, 2023) Küçükkör, Özge; Karakoç, Tahir Hikmet; Durak, Umut
    Energy management is one of the most crucial issues for the solar powered High Altitude Platforms (HAPs). In UAVs with solar panels, sufficient power shall be provided to run the equipment on the vehicle and charge the battery during long flights. To provide this generated power to all these components in the most precise and efficient way, Maximum Power Point Tracking (MPPT) is an excellent option. There are some critical circumstances that affect the performance of the MPPT in the aircraft. Flight conditions affect the power that can be acquired from the photovoltaic (PV) panel on the UAV. In this article, irradiance values which are one of the input parameters of the PV panel are calculated by taking the altitude at 25 km and latitude at a 45° as flight conditions of the HAP as the reference. Under these conditions, the average irradiance values at 12:00 P.M. are calculated for each month of the year and efficiencies for different MPPT algorithms under these conditions has been discussed. © 2023, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.