Single Line Tethered Glider Team P14462 Sub-System Level Design Review Jon Erbelding Paul Grossi Sajid Subhani Kyle Ball Matthew Douglas William Charlock

9/30/2013 Systems Level Design ReviewP14462 Team Introduction Team MemberMajor Sajid SubhaniIndustrial Engineer - Team Lead Paul GrossiMechanical Engineer Matt DouglasMechanical Engineer Jon ErbeldingMechanical Engineer Kyle BallMechanical Engineer Bill CharlockMechanical Engineer

9/30/2013 Systems Level Design ReviewP14462 Agenda ●Project Description Review ●Engineering Requirements Review ●Functional Decomposition Review ●Top 3 Concepts from Last Review ●Concept Feasibility ●Glider Analysis and Feasibility ●Base Station Analysis and Feasibility ●Project Planning ●Work Breakdown Structure

9/30/2013 Systems Level Design ReviewP14462 Project Description Review ●Goal: Design, build, and test a tethered, small-scale, human-controlled glider. ●Critical Project Objectives: ○ Maintain maximum tension on the tether ○ Sustaining horizontal and vertical flight paths ○ Measure and record tether tension and position ○ Understand the influential parameters for sustained, tethered, unpowered flight Glider Tether Base Station Operator w/ controller

9/30/2013 Systems Level Design ReviewP14462 Engineering Requirements

9/30/2013 Systems Level Design ReviewP14462 Functional Decomposition

9/30/2013 Systems Level Design ReviewP14462 Review of Top 3 System Concepts 3 Single Axis Load Cell IMU with Single Axis Load Cell 2 Potentiometers with Single Axis Load Cell

9/30/2013 Systems Level Design ReviewP14462 Glider Analysis

9/30/2013 Systems Level Design ReviewP14462 Choosing the Glider Bixler v1.1 EPO Foam Wing span: 1.4 [m] Chord length: 0.2 [m] Mass: 0.65 [kg] Middle mounted propeller Only EPO Foam Phoenix 2000 EPO Foam Wing span: 2 [m] Chord length: 0.3 [m] Mass: 0.98 [kg] Front mounted propeller Reinforced

9/30/2013 Systems Level Design ReviewP14462 Choosing the Glider The smaller Bixler glider creates less tension for a larger operating range Able to operate with an affordable load cell

9/30/2013 Systems Level Design ReviewP14462 Flight Orientation

9/30/2013 Systems Level Design ReviewP14462 Flight Orientation

9/30/2013 Systems Level Design ReviewP14462 Flight Analysis Wind Speed: ~ 11 mph

9/30/2013 Systems Level Design ReviewP14462 Flight Analysis Wind Speed: ~ 22 mph

9/30/2013 Systems Level Design ReviewP14462 Flight Analysis Wind Speed: ~ 44 mph

9/30/2013 Systems Level Design ReviewP14462 Qualitative DOE  Slower wind speed: lower tension  Larger flight path radius: lower tension  Beta angle peaks: ~ 94-95°  Tension peaks: ~ 20 [m] tether length Tension must be less than 5000 [N] (1100 lbs)

9/30/2013 Systems Level Design ReviewP14462 Quantitative DOE Choosing flight configuration  Inputs Maximum allowable tension Observed wind speed  Outputs Beta angle Tether length Flight path radius

9/30/2013 Systems Level Design ReviewP14462 Bridle and Tether Setup Use a tension of 3000 lbs as an overestimate. Maximum allowable stress for Bixler glider: 30 MPa Bridle attached at two points on the fuselage causes structural failure at the wing root with 180 MPa

9/30/2013 Systems Level Design ReviewP14462 Proposed Tether and Bridle Design

9/30/2013 Systems Level Design ReviewP14462 Ideal Bridle Location Analysis Optimum tether location: 0.51 m from root. Optimum tether angle: 54 deg from airplane

9/30/2013 Systems Level Design ReviewP14462 Wing Stress Analysis

9/30/2013 Systems Level Design ReviewP14462 Wing Stress Analysis Maximum stress: 15 MPa

9/30/2013 Systems Level Design ReviewP14462 Fuselage Stress Analysis

9/30/2013 Systems Level Design ReviewP14462 Tether and Bridle Configuration

9/30/2013 Systems Level Design ReviewP14462 Base Station Analysis and Feasibility

9/30/2013 Systems Level Design ReviewP Potentiometers and Single-Axis Load Cell Concept 1

9/30/2013 Systems Level Design ReviewP14462 Vertical Rotation

9/30/2013 Systems Level Design ReviewP14462 Static Analysis

9/30/2013 Systems Level Design ReviewP14462 Dynamic Analysis

9/30/2013 Systems Level Design ReviewP14462 Dynamic Analysis Continued

9/30/2013 Systems Level Design ReviewP Single-Axis Load Cells ●Created 3-D model of the system in SolidWorks ●Works well when the ball joints are kept in tension as seen in Fig 1. ●Ball joints fail when they are put into compression as seen in Fig 2. Fig. 1 Fig. 2

9/30/2013 Systems Level Design ReviewP14462 Base Station Equipment Phidgets 3140_0 – S Type Load CellBourns 3540S-1-103L Potentiometer

9/30/2013 Systems Level Design ReviewP14462 Initial Base Station Budget Comparison P14462 Purchase List for 3 Load Cell Base Station Part DescriptionUnit PriceQtyIndividual Total Phidgets 3140_0 - S Type Load Cell Ball End Joint Rod Shipping 0.00 Total Order Price P14462 Purchase List for Potentiometer Base Station Part DescriptionUnit PriceQtyIndividual Total Phidgets 3140_0 - S Type Load Cell Bourns 3540S-1-103L Potentiometer Miniature Aluminum Base-Mounted Stainless Steel Ball Bearings— ABEC Flanged Open 1/2 Inch Ball and Roller Bearing7.611 Shipping 0.00 Total Order Price

9/30/2013 Systems Level Design ReviewP14462 Project Planning

9/30/2013 Systems Level Design ReviewP14462 Project Planning

9/30/2013 Systems Level Design ReviewP14462 Work Breakdown Structure (10-12) ●Paul: ●Jon: ●Kyle: ●Matt: ●Saj: ●Bill:

9/30/2013 Systems Level Design ReviewP14462 Questions?

9/30/2013 Systems Level Design ReviewP14462 References