9/30/2013 Systems Level Design Review P14462
Single Line Tethered Glider
Team P14462Sub-System Level Design Review
Jon ErbeldingPaul Grossi
Sajid Subhani
Kyle BallMatthew DouglasWilliam Charlock
Team Introduction
Team Member Major
Sajid Subhani Industrial Engineer - Team Lead
Paul Grossi Mechanical Engineer
Matt Douglas Mechanical Engineer
Jon Erbelding Mechanical Engineer
Kyle Ball Mechanical Engineer
Bill Charlock Mechanical Engineer
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
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
Engineering Requirements
Functional Decomposition
Review of Top 3 System Concepts
3 Single Axis Load Cell IMU with Single Axis Load Cell 2 Potentiometers with Single Axis Load Cell
Glider Analysis
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
Phoenix 2000 EPO Foam Wing span: 2 [m] Chord length: 0.3 [m] Mass: 0.98 [kg] Front mounted propeller
Choosing the Glider The smaller Bixler glider creates less
tension for a larger operating range Able to operate with an affordable load cell
Flight Orientation
Flight Orientation
Flight Analysis
Wind Speed: ~ 11 mph
Flight Analysis
Wind Speed: ~ 22 mph
Flight Analysis
Wind Speed: ~ 44 mph
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)
Quantitative DOE [Describe how will pick our flight
configuration for experiment] Inputs
Maximum allowable tension Observed wind speed
Outputs Beta angle Tether length Flight path radius
Bridle and Tether Setup 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
Proposed Tether and Bridle Design
Ideal Bridle Location Analysis
Wing Stress Analysis
Wing Stress Analysis
Maximum stress: 15 MPa
Fuselage Stress Analysis
Tether and Bridle Configuration
Base Station Analysis and Feasibility
2 Potentiometers and Single-Axis Load Cell
3 Single-Axis Load Cells
Project Planning
Project Planning
Work Breakdown Structure (10-12)● Paul: ● Jon: ● Kyle: ● Matt: ● Saj: ● Bill:
Questions?