Master Degree / Yüksek Lisans Tezleri

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Author: search.filters.author.Özdemir, SerhanSubject: search.filters.subject.CFD analysis

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  • Master Thesis
    Modelling of an Impact Resistant Navigation System for Gun Projectiles Based on Low Cost Mems Sensors
    (01. Izmir Institute of Technology, 2021) İnel, Selahattin Can; Özdemir, Serhan
    In this thesis, guided projectiles are studied in three aspects: a navigation system design, CFD analysis of a guided projectile for low launch velocities and durability of electronic components under extreme firing conditions. During the thesis progress, MATLAB & Simulink, FlightGear and Ansys-Fluent software are used for simulations and 3D object modelling. Basic Finner Reference Projectile is chosen as a test bed for navigation simulation, since the dimensions and some of the flight parameters are already available as open source. However, a missile state-space model which is given by Raytheon is used for navigation simulations instead of a guided projectile model due to inaccessibility of some critical aerodynamic parameters for 6-DoF model. Navigation system is designed using preset guidance methodology which uses built-in inertial sensors to correct the course for given targets which location are loaded prior to launching. CFD calculations of the Basic Finner Reference Projectile are conducted for low launching velocities to light the way for the aerodynamic conditions of non-explosive firing equipments such as catapults and airguns. Furthermore, the durability of common electronic components under extreme projectile firing conditions are visualized up to 20,000g and the functionality of regular off the shelf microcontrollers and sensors are tested using Hopkinson Bar test equipment. A navigation model simulation of a guided munition is created combining FlightGear and MATLAB & Simulink satisfying the given different criteria for pole placement method, LQR controller and observer design.