fa تعیین ضرایب هیدرودینامیکی زیرسطحی‌ها به روش تست مدل هیدرودینامیک کشتی Ship Hydrodynamic مقاله پژوهشي Research Paper In recent years, unmanned vehicles have intensively been developed to reduce human dangers for marine applications. Predicting the hydrodynamic coefficients of an autonomous underwater vehicle is important during the vehicle’s design phase. In other words to design an AUV, one must clarify its maneuverability and controllability based on a mathematical model. The mathematical model contains various hydrodynamic forces and moments expressed collectively in terms of hydrodynamic coefficients. Therefore, the correct values of the coefficients must be known to precisely design the controller of AUVs. Despite of remarkable progress in numerical analysis in recent years, But the experimental methods test modes is still more reliable. No marine vehicle will be manufactured unless its model been tested clearly first. SUT-2 is an AUV, being developed by Marine Engineering Research Center Sharif University of Technology in Iran. Model test done into marine engineering laboratory towing tank. In this paper hydrodynamic coefficients calculated with model test of autonomous underwater vehicle and hydrodynamic forces analyzed. This coefficients are used for dynamic modeling and autonomous controller design Hydrodynamic Coefficient, Autonomous Underwater Vehicles (AUV), Dynamic Modeling, Model test 31 43 http://marine-eng.ir/browse.php?a_code=A-10-10-1&slc_lang=fa&sid=1 behnam Sadeghzadeh Parapari بهنام صادق زاده پراپری Behnam.sadeghzadeh@gmail.com 1003194753284600645 1003194753284600645 Yes Mech. Eng. Department, Sharif University of Tech. دانشکده مکانیک دانشگاه صنعتی شریف mohamad Saed seif محمد سعید سیف 1003194753284600646 1003194753284600646 No Mech. Eng. Department, Sharif University of Tech. دانشکده مکانیک دانشگاه صنعتی شریف hamid Mahdigholi حمید مهدیقلی 1003194753284600647 1003194753284600647 No Mech. Eng. Department, Sharif University of Tech. دانشکده مکانیک دانشگاه صنعتی شریف