OATS MIDTERM PRESENTATIONOATS MIDTERM PRESENTATION7/8/11

Auburn Student Team:

Kyle Palmer (Project Manager)

Ben Bethel

Grayson Dawson

Cody Owen

Daniel Paulk

Why we are here?

� Auburn University’s senior design project

� 2-semester project

� Design 1st Semester

� Build 2nd Semester

� Goals: Implement a systems engineering approach to

solve an industrial problem

Overview

� Problem Statement

� Primary Design Requirements

� List of Concepts

� Concepts (1 of 4)

� CAD visual

� Advantages� Advantages

� Disadvantages

� Product Hierarchy

� Design Comparison

� Conclusions

Problem Statement� Current method- time consuming

Solution,

� Automate data collection process for antenna under test

15°Resolution

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Preliminary Design Requirements

� Carriage to go around track ≤ 4 minutes

� Wireless communication

� Removable cart

� Efficient battery life� Efficient battery life

� Angular position of carriage w/ in 1 degree

� Robust, environmentally tolerant

� Clutch mechanism for manual override

List of Concepts1. Battery Powered, Wheel Driven

2. Monorail Concept, Wheel Driven

3. Battery Powered, Sprocket Driven

4. AC Outlet Powered, Sprocket Driven

Concept 1

Battery Powered, Wheel Driven

Features

• Motor and

Battery on

carriage

ElectronicsBattery

Motor

carriage

• Wheel driven

Concept 1 (cont.)Advantages

� Light weight

� Relatively inexpensive

� Few moving parts

� Simple design

� Constant RF interference� Constant RF interference

� Easier to filter out a constant source of noise

Disadvantages

� Recharge/Replace battery

� Inconsistent position control due to slip

Concept 2

Monorail Powered, Wheel Driven

Motor

ElectronicsMonorailFeatures

• Power source:

Monorail

• Motor on

NOTE: TEATHERED CONNECTION NOT SHOWN

• Motor on

carriage

• Wheel driven by

motor

Wheel guide

Concept 2 (cont.)Advantages

� No restriction on power source for motor

� Cement track for carriage

� Less metal,less interference with antenna

DisadvantagesDisadvantages

� High cost

� Overseas market

� Overkill design

� Problematic maintenance

Concept 3

Outlet Powered, Chain Driven

Carriage for electronicsCarriage for electronics

Features

• Stationary

motor

• Sprocket

driven by

motor

Chain

Sprocket

Chain guide

motor

• Cart

attached to

chain

• Chain

rotates

around track

CLICK ME!

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Concept 3 (cont.)

Advantages

� No restriction on power source for motor

� Longer life for electronics

� Stationary motor not on carriage

� More vacant space for electronics

� Options for larger motor size� Options for larger motor size

Disadvantages

� Mechanically complex

� Many moving parts

� Stretching of chain

Concept 4

Battery Powered, Sprocket Driven

Motor

Features

• Motor on carriage

• Sprocket driven

by motor

Sprocket

Chain

by motor

• Stationary chain

around track

Concept 4 (cont.)Advantages

� Light weight

� Relatively inexpensive

� Few moving parts

� Simple design

� Sprocket driven

� Precise position control

� Constant RF interference

� Easier to filter out a constant source of noise

Disadvantages

� Recharge/Replace battery

Design Comparison

Conclusion and Outlook� Conclusion

� Concept decision

� Battery powered with driven sprocket

� Benefits of chosen concept

� Accurate and precise position control

� Simplicity of design

� Battery life not an issue� Battery life not an issue

� Outlook

� Finish sizing motor and battery

� Finish embodiment of the chosen concept

� CAD drawings for carriage and track

� Begin manufacturing plan

� Generate parts list

� Price material

Questions or Comments?