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Modeling of a series hybrid propulsion uav used for monitoring in the galapagos islands

Abstract:

The use of hybrid propulsion systems in the last decade has increased enormously due to main concerns about environment and energy cost. In this regard, hybrid series systems for small and MALE UAVs have proved better performance, due to its basic control, low cost and electrical system lower weight contribution. These platforms usually are envisioned for technification of the monitoring processes, where it is required a low CO2 footprint, whilst maintaining good performance. This study carries out a parametric modelling of a UAV using a series hybrid propulsion system, using as case of study the monitoring of biodiversity in the Galapagos Islands. The design space for the propulsion system is carried out using semi-empirical and parametric approaches. A constrain analysis coupled with a weight estimation tool is used to determine hybridization points, which feed the engine bench marking analysis module. From this analysis an optimal propulsion configuration with a hybridization degree of 46% is found. The endurance defined by the application and UAV capabilities provides five hours of flight time, whilst maintaining a MTOW lower than 160 [Kg] and a wingspan of 5.9 [m], these two latter parameters are used as figure of merit, since they help for UAV transport and storing.