Akademik Veri Yönetim Sistemi
UPB Scientific Bulletin, Series D: Mechanical Engineering, cilt.81, sa.2, ss.125-140, 2019 (Scopus)
Unmanned Aerial Vehicles are extensively exploited for diverse applications importantly surveillance, reconnaissance, defense and military. Development of unmanned amphibious vehicle with integrating features of multirotor and hovercraft principles to navigate along and above water body, land surface and also flying in air is challenging task. This article presents conceptual design of amphibious vehicle for the payload capacity of 7 kg with an endurance of 20 minutes and provision for mounting water sampler to collect water samples in remote water bodies. Finite element analysis (FEA) is performed to evaluate the structural strength characteristics of each part of amphibious vehicle and integrity of structure is analyzed. FEA results indicated that the designed amphibious vehicle structure is well within the stress limit and minimal displacement is obtained. Based on structural analysis materials for various parts of amphibious vehicle are determined and integrated structure is analyzed with a due consideration of lift carrying capacity, payload, battery and other electronic module weights. Modal analysis predicted the natural frequencies of the structure which are very near to vortex shedding frequency and safe operation speed of propelling the motors is determined. A scaled down model is prototyped and tested for its functionality in land, water and flying in air.