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?