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Arizona State University Autonomous UAV Project

Keenan Valentine Introduction & Stress Analys is. Arizona State University Autonomous UAV Project. Introduction I. The ASCEND team at Arizona State University is designing, optimizing, and building an autonomous Unmanned Aerial Vehicle (UAV) to compete in a 2010 UAV aerial imaging contest. 

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Arizona State University Autonomous UAV Project

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  1. Keenan Valentine Introduction & Stress Analysis Arizona State UniversityAutonomous UAV Project

  2. Introduction I • The ASCEND team at Arizona State University is designing, optimizing, and building an autonomous Unmanned Aerial Vehicle (UAV) to compete in a 2010 UAV aerial imaging contest.  • The objectives of the contest are: (1) to fly an UAV via remote control non-stop for 20-40 minutes in a square search area of 1 square miles, and (2) use onboard/remote human detectors to locate and identify targets marked by colored alphabets Courtesy of Ted Hench

  3. Introduction II Additional contest rules: (1) fly between 100 and 750 feet above ground, (2) fly over way points (GPS), (3) some targets are along route/some are not, and (4) better performance = higher score

  4. Stress Analysis I • Geometry: (1) Clark Y airfoil, (2) a wingspan of 10+ feet, (3) a chord length of 12+ inches, (4) tubular fuselage, and (5) standard tail. • Critical Points: (1) entire wing, (2) wing attachment to fuselage, (3) tail attachment to fuselage, and (4) landing gear.  • Method: (1) FEA, (2) analytical bounds, and (3) testing • Challenges: (1) non-isotropic material, (2) complex geometry, (3) unpredictable loads and (4) FEA error (accuracy and precision)

  5. Stress Analysis II http://aeweb.tamu.edu/sae_design/pictures/rib.gif Solutions: (1) use isotropic analysis with minimum material strength, (2) CAD modeling, (3) safety factor, and (4) grid refinement/convergence studies, and (5) analytical approximations to determine solution limits. Results: (1) adding internal structural ribs to wing, and (2) smooth out notches to decrease stress concentrations and yielding. Conclusion: structural analysis is critical to the success of the UAV

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