Hybrid Propulsion System to Power Unmanned Aerial Vehicle in Worst Case Scenario
Abstract
The present fuel cell systems have demonstrated a high degree of efficiency for automotive applications. Currently the technology is under consideration as a potential power source for Unmanned Aerial Vehicles (UAVs). This paper presents an investigation of the fuel cell/battery hybrid propulsion system for the PiperCub J3 aircraft in worst case scenario (battery low state of charge) by using the fuzzy logic controller. The hybrid propulsion system consists of a 1.2kW Nexa PEMFC, three 12V batteries, DC/DC converters, and an electrical engine. The fuzzy logic control the output powers of the batteries through the bidirectional DC/DC converter to assist and maintain the fuel cell operating at an optimal point with high efficiency as a main power supply to achieve the desired power for different phases of flight. After completing the test of the first flight scenario, the batteries had been operating for a long time.
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