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Final PresentationMAE 4810

24 April 2014

Amberley Snyder

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Design Question

How can a paraplegic safely

and independently mount and dismount a

horse?

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Design Requirements Lifting capacity 260 lbs Attach to a horse trailer Powered by DC (battery) Comfortable speed/

smooth operation Independent operation/

simple controls Padded seat/ wheelchair

Lap belt/ safety restraints

Meets ADA requirements

Low noise Max height of horse 17

hands (5’8”) Horse restraint Mount horse from left

side Durability/ travel cover Conforms to traffic

safety laws

Design Goals, Performance Objectives Goals:

Aesthetically pleasing

Ability to saddle horse independently

Assumptions: Level ground Docile horse Wheelchair with

brakes Person and

wheelchair weigh less than 260 lbs

Rider has strong upper body strength

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Critical Design Solution

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Subsystem: Trailer Supports

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Subsystem: Tracks

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Subsystem: Platform

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Subsystem: Fold-Up

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Subsystem: Horse Restraints

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Design Test & EvaluationDesign

Requirement Outcome Design Requirement Outcome

Lifting Capacity of 260 lbs

PASS(400 lbs)

Lap Belt/ Safety Restraints PASS

Attach to Horse Trailer PASS Meets ADA

RequirementsPASS (SF > 5)

Powered by DC PASS Maximum Height of Horse 17 Hands

PASS (48.5”)

Comfortable Speed

PASS (.6/ .4 ft/s) Low Noise Level

FAIL (72.4/ 87 dB)

Smooth Operation

PASS (.6/ 1 g) Horse Restraint PASS

Independent Operation PASS Mount Horse from

Left Side PASS

Simple Controls PASS Durability/ Travel Cover ONGOING

Padded Seat/ Wheelchair PASS Conforms to

Traffic Safety LawsPASS (5 15/16”)

Performance FactorsComponent Safety Factor Horizontal Arms 5Support Link Bolts 10Chain Attachment Bolts 9Vertical Tracks 6Horizontal Tracks 5Hinge Point Bolts > 30Platform 7

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46.5” vertical motion 15” horizontal motion 260 lbs (SF > 5.0), tested up to 400 lbs

Budget

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Subsystem Outcome

Tracks/ Structure $5265

Lift System $2394

Restraints $254

Deploy $200

Platform $346

Controls $742

Powder Coating $637

Stabilization System $599

Miscellaneous $277

TOTALS

SPENT $10,715

ALLOCATED $10,000

Special Thanks

Intuitech Inc. Richard Eversull Amberley Snyder John Rasmussen Intermountain

Hydraulics Shalee Killpack Ducworks Inc.

Vincent S. Clay Christensen Mike Morgan Lowes Home Depot

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Questions?

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APPENDIX:

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Failure Mode Effects and Analysis

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