single line tethered glider
Post on 23-Feb-2016
41 Views
Preview:
DESCRIPTION
TRANSCRIPT
Single Line Tethered Glider
Team P14462Sub-System Level Design Review
Jon ErbeldingPaul Grossi
Sajid Subhani
Kyle BallMatthew DouglasWilliam Charlock
9/30/2013 Systems Level Design Review P14462
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
9/30/2013 Systems Level Design Review P14462
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 Review P14462
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 Review P14462
Engineering Requirements
9/30/2013 Systems Level Design Review P14462
Functional Decomposition
9/30/2013 Systems Level Design Review P14462
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 Review P14462
Glider Analysis
9/30/2013 Systems Level Design Review P14462
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 Review P14462
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 Review P14462
Flight Orientation
9/30/2013 Systems Level Design Review P14462
Flight Orientation
9/30/2013 Systems Level Design Review P14462
Flight Analysis
Wind Speed: ~ 11 mph
9/30/2013 Systems Level Design Review P14462
Flight Analysis
Wind Speed: ~ 22 mph
9/30/2013 Systems Level Design Review P14462
Flight Analysis
Wind Speed: ~ 44 mph
9/30/2013 Systems Level Design Review P14462
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 Review P14462
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 Review P14462
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 Review P14462
Proposed Tether and Bridle Design
9/30/2013 Systems Level Design Review P14462
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 Review P14462
Wing Stress Analysis
9/30/2013 Systems Level Design Review P14462
Wing Stress Analysis
Maximum stress: 15 MPa
9/30/2013 Systems Level Design Review P14462
Fuselage Stress Analysis
9/30/2013 Systems Level Design Review P14462
Tether and Bridle Configuration
9/30/2013 Systems Level Design Review P14462
Base Station Analysis and Feasibility
9/30/2013 Systems Level Design Review P14462
2 Potentiometers and Single-Axis Load Cell
Concept 1
9/30/2013 Systems Level Design Review P14462
Vertical Rotation
9/30/2013 Systems Level Design Review P14462
Static Analysis
∑ 𝑀𝑜=𝑇𝑟𝑠𝑖𝑛 (𝛿𝜑 )−𝑊 𝐿𝐶𝑑𝑐𝑜𝑠 (𝜃 )−𝑀𝑝𝑜𝑡−𝑀𝑏𝑒𝑎𝑟=0∴𝑇=
𝑀𝑝𝑜𝑡+𝑀𝑏𝑒𝑎𝑟+𝑊 𝐿𝐶𝑑𝑐𝑜𝑠(𝜃)𝑟𝑠𝑖𝑛(𝛿𝜑)
9/30/2013 Systems Level Design Review P14462
Dynamic Analysis
∑ 𝑀𝑜=𝑇𝑟𝑠𝑖𝑛 (𝛿𝜑 )−𝑊 𝐿𝐶𝑑𝑐𝑜𝑠 (𝜃 )−𝑀𝑝𝑜𝑡−𝑀𝑏𝑒𝑎𝑟=𝐼𝐿𝐶𝛼∴𝑇=
𝐼𝐿𝐶𝛼+𝑀𝑝𝑜𝑡+𝑀𝑏𝑒𝑎𝑟+𝑊 𝐿𝐶 𝑑𝑐𝑜𝑠(𝜃)𝑟𝑠𝑖𝑛(𝛿𝜑)
9/30/2013 Systems Level Design Review P14462
Dynamic Analysis Continued
9/30/2013 Systems Level Design Review P14462
3 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 Review P14462
Base Station EquipmentPhidgets 3140_0 – S Type Load
CellBourns 3540S-1-103L Potentiometer
9/30/2013 Systems Level Design Review P14462
Initial Base Station Budget ComparisonP14462 Purchase List for 3 Load Cell Base Station
Part Description Unit Price Qty Individual TotalPhidgets 3140_0 - S Type Load Cell 50 3 150.00Ball End Joint Rod 3.78 6 22.68Shipping 0.00
Total Order Price 172.68
P14462 Purchase List for Potentiometer Base Station
Part Description Unit Price Qty Individual TotalPhidgets 3140_0 - S Type Load Cell 50 1 50.00Bourns 3540S-1-103L Potentiometer 20 2 40.00Miniature Aluminum Base-Mounted Stainless Steel Ball Bearings—ABEC-3 14.92 2 29.84Flanged Open 1/2 Inch Ball and Roller Bearing 7.61 1 7.61Shipping 0.00
Total Order Price 127.45
9/30/2013 Systems Level Design Review P14462
Project Planning
9/30/2013 Systems Level Design Review P14462
Project Planning
9/30/2013 Systems Level Design Review P14462
Work Breakdown Structure (10-12)● Paul: ● Jon: ● Kyle: ● Matt: ● Saj: ● Bill:
9/30/2013 Systems Level Design Review P14462
Questions?
top related