Abstract
In order to overcome the propre disadvantages of FW(Fixed-Wing) and VTOL(Vertical-Taking-Off-and-Landing) UAV (Unmanned Aerial Vehicle) and extend its application, the hybrid drone is invested more in recent years by researchers and several classifications are developed on the part of dual system. In this article, an innovative hybrid UAV is raised and studied by introducing the canard configuration that is coupled with conventional delta wing as well as winglet structure. Profited by Computational Fluid Dynamics (CFD) and Response Surface Method (RSM), a multilevel optimization approach is practically presented and concerned in terms of cruise flight mode: adopted by an experienced-based distribution strategy, the total lift object is respectively assigned into the delta wing (90–95%) and canard wing(5–10%) which is applied into a two-step optimization: the first optimization problem is solved only with the parameters concerned with delta wing afterwards the second optimization is successively concluded to develop the canard configuration considering the optimized delta wing conception. Above all, the optimal conceptual design of the delta and canard wing is realized by achieving the lift goal with less drag performance in cruise mode.
Highlights
Introduction to hybrid UAVDuring recent decades, the UAVs have attracted amount of interests and researches with the civil and military aim such as logistics, geographical mapping, routine surveillance [1]
To simplify the optimization work and reduce the calculating cases in Computational Fluid Dynamics (CFD) simulation, a quick and effective multilevel method is presented and adopted in the design and optimization of the Tube-Fan hybrid UAV featuring with canard configuration [14]: Above all, the suitable strategy is discussed to distribute the lift providing by delta wing and canard wing [15]: First step of optimization, the optimization based on 5 parameters is carried on to determine the shape of the delta wing with satisfying the lift goal of delta wing; Second step of optimization, based on the optimized shape obtained in First step, the optimization based on 4 parameters in canard modelling is continued to reach the final optimized objects of the Tube-Fan hybrid UAV
In the innovative Tube-Fan hybrid UAV, the multilevel optimization approach is successfully adapted to introduce the canard configuration into the conceptual design
Summary
The UAVs have attracted amount of interests and researches with the civil and military aim such as logistics, geographical mapping, routine surveillance [1]. The hybrid drones are specialized with the ability of VTOL and cruise flying, there are several natural but critical conflicts between two procedures in technology, which stands out in the development of hybrid drone [2]. According to the advancement in hybrid UAVs’ researches in recent years, this article prefers to divide the hybrid drones with the specialization of propulsion system, especially considering the main conflicts of VTOL and FW procedure. Several sub-types are grouped respectively depending on aerodynamic performance and transition system (see Fig. 1).
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