Engineering

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https://hdl.handle.net/20.500.14540/17047

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Browsing Engineering by Advisor "Karki, Ashish"

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    Design, Fabrication, and Experimental Analysis of Tiltrotor Mechanism
    (I.O.E, 2024-03) Luitel, Kshitij; Koirala, Kushal Sharma; Gurung, Monika; Dahal, Ujjwal; Karki, Ashish
    This paper presents the design and synthesis of a tilt-rotor mechanism for a hybrid UAV that can perform vertical takeoff and landing (VTOL) and fixed-wing flight. The tilt-rotor mechanism allows the orientation of the propulsion system to change from vertical to horizontal or vice versa, enabling the UAV to fly like a helicopter or an airplane. The paper describes the design, mathematical modeling, structural analysis, and fabrication of the mechanism, as well as the design and testing of a test bench and a control system. The paper also evaluates the performance of the mechanism and the system on a bi-copter UAV model and discusses the challenges, limitations, and future enhancements of the project. The paper concludes that the tilt-rotor mechanism is a promising solution for hybrid UAVs that can combine the advantages of both rotorcraft and fixed-wing UAVs.
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    DEVELOPMENT AND TESTING OF AUTONOMOUS FIXED-WING UAV FOR SAFE MEDICAL PAYLOAD DELIVERY
    (I.O.E, 2024-03-10) Chapagai, Aayush; Karki, Bhimraj; Thapa, Dakshesh; Sapkota, Niyat; Karki, Ashish
    This project endeavors to develop a cost-effective and efficient Unmanned Aerial System (UAS) designed for transporting medical supplies to remote and challenging locations. The UAS, a fixed-wing aircraft, incorporates a parachute system to ensure the secure and safe delivery of medical cargo. The design process involves optimizing aerodynamic characteristics, flight dynamics, payload capacity, and the parachute deployment mechanism to ensure successful deliveries, especially across difficult terrains.The major objective of the project is to ensure a quality built of a fixed wing UAV which can effortlessly deliver the medical goods to the remote location of the Solukhumbu district in time of crisis and need. The Terrain of Nepal itself being quite complex and difficulty for mode of transportation to reach the remote location make use of UAV like Aid-Plane more viable. The prototype underdevelopment later can be used not just for medical sectors but also facilitate other major sectors and regions of Nepal