P12031: Motion Assistive Seating Device for Sailing Project Team: - - PowerPoint PPT Presentation
P12031: Motion Assistive Seating Device for Sailing Project Team: Faculty Guide: Edward Hanzlik Steven Gajewski Technical Mentor: Kate Leipold Aleef Mahmud Primary Customer: Richard Ramos Secondary Customer: Keith Burhans Mitchel Rankie
Project Team: Steven Gajewski Aleef Mahmud Mitchel Rankie Christopher Sullivan
MSD - P12031
Faculty Guide: Edward Hanzlik Technical Mentor: Kate Leipold Primary Customer: Richard Ramos Secondary Customer: Keith Burhans Sponsor: Mark Smith and M.E. Dept. National Science Foundation
1
MSD - P12031
The goal of this project is to re-design, build, and test a portable, detachable seating system that will allow disabled users to participate in IFDS competitive
arm motion to steer the boat’s rudder and allow adjustment of the user’s position by rotating along a bearing mounted track for leverage and view during sailing scenarios. The team must reduce excess weight, increase functionality, and adapt specifically for a C 4-5 quadriplegic user.
2
Need # Importance Description
CN1 1 Designed to fit specifically in SONAR sailboats CN2 1 Safe system to operate for long periods CN3 1 System controls rudder CN4 1 Portable, non-permanent installation on boat CN5 1 Environmentally resistant to wear CN6 1 Shippable and fits on one palette CN7 1 Emergency override for rudder control CN8 1 Weight of system is primarily over the keel CN9 1 Crank Geometry (length of crank fits shoulder width) CN10 1 25% weight reduction CN11 1 Ease of operation (biceps work required reduced) CN12 1 Easy to detach hands from crank CN13 2 Comfortable hand crank height (height of crank shaft) CN14 2 Re-work “chair swing” mechanics/mechanism CN15 2 Tilt in seat for better view CN16 2 20% cost reduction in BOM CN17 3 Better fitting harness CN18 3 Less abrasive harness CN19 3 Easier entry for user CN20 3 Rearview mirror
Spec # Importance Source Description
ES1 1
CN1, CN4
Secure to Sonar with non-permanent attachments
ES2 1
CN2
Minimum FOS of critical elements found via analysis
ES3 1
CN2
Time required to release user from seat and system
ES4 1
CN3
Degree of movement of Rudder from centerline of boat
ES5 1
CN3
Backlash in the lines controlling the Rudder
ES6 1
CN4, CN6
Cubic area of disassembled and packed unit
ES7 1
CN5
Corrosion resistance
ES8 1
CN7
Functioning emergency overide for Rudder
ES9 1
CN8
Location of Track Platform respective to Keel
ES10 1
CN9
Length of the distance between hand attachment points
ES11 1
CN10
Weight of each part combined
ES14 1
CN11
Percentage of amplification of user's force input
ES15 2
CN12
Time required to detach hands
ES16 2
CN13, CN18
User Specified Harness
ES17 2
CN13, CN18
Comfort perceived by user from 1[low]-10[high]
ES18 2
CN14
Height of crank shaft relative to the bottom of the seat
ES19 2
CN15
Clearence of tangle prone lines from chair swinging
ES12 3
CN16
Angle of tilt of chair relative to horizontal plane of deck
ES13 3
CN17
Cost of components purchased for design during MSD
ES21 3
CN19
Time required for entry
ES22 3
CN20
Functioning rearview mirror
User Device Portability Attachable Non Permanent Assembly Required Major Parts Tiller Strut Tiller Arm Track Platform Passenger Interface Seat Cranks Pedestal Base Tiller Control Override Rotate hand Crank Ropes Taut Shifting Weight Ropes and Pulleys Locking Mechanism Restrain User 4-Point harness Hands Feet Steering column tilt Boat
MSD - P12031
5
MSD - P12031
6
MSD - P12031
7
MSD - P12031
8
MSD - P12031
9
MSD - P12031
10
MSD - P12031
11
MSD - P12031
12
MSD - P12031
13
MSD - P12031
14
MSD - P12031
15
Customer Need # Importance Description Status CN1 1
Designed to fit specifically in SONAR sailboats
Pass
CN2 1
Safe system to operate for long periods
Pass
CN3 1
System controls rudder
Pass
CN4 1
Portable, non-permanent installation on boats
Pass
CN5 1
Environmentally resistant to wear
Pass
CN6 1
Shippable and fits on one palette
Pass
CN7 1
Emergency override for rudder control
Pass
CN8 1
Weight of system is primarily over the keel
Pass
CN9 1
Crank Geometry (length of crank fits shoulder width)
Pass
CN10 1
25% weight reduction
Fail
CN11 1
Ease of operation (biceps work required reduced)
Pass
CN12 1
Easy to detach hands from crank
Pass
MSD - P12031
16
Customer Need # Importance Description Status CN13 2
Better fitting harness
Pass
CN14 2
User Specific hand crank height (height of crank shaft)
Pass
CN15 2
Address issue of lines tangling during chair swing
Pass
CN16 2
Tilt in seat for better view
Pass
CN17 3
Maximum cost of BOM cannot exceed $3000
Pass
CN18 3
Less abrasive harness
Pass
CN19 3
Quick entry for user
Pass
CN20 3
Rearview mirror
Fail
Test # Importance Test Item Source Unit Min. Value Ideal Value Actual Value Pass/ Fail
T1.0 Weight and Cost
T1.1 1 Weight of each part combined lb 106> 79.5> 88 Pass T1.2 3 Cost of components purchased $ 3000> 2400> 2800+ Pass
T2.0 User Comfort
T2.1 1 Distance between hand attachment points in 18±2 18±.5 17 Pass T2.2 2 Height of crank relative to the bottom of the seat in 18±2 18±.5 19 Pass T2.3 2 User Specified Harness Binary Yes Yes Yes Pass T2.4 2 Comfort perceived by user from 1[low]-10[high] # 5< 10 7 Pass
T3.0 Installation
T3.1 1 Cubic area of disassembled and packed unit in^3 74088> 66679> 37800 Pass T3.2 1 Secure to Sonar with non-permanent attachments Binary Yes Yes Yes Pass T3.3 3 Time required for entry minutes 60> 30> 11 Pass MSD - P12031
17
Test # Importance Test Item Source Unit Min. Value Ideal Value Actual Value Pass/ Fail
T4.0 Normal Sailing Conditions
T4.1 1 Degree of movement of Rudder from centerline degrees 40< 90< 46.6 Pass T4.2 1 Backlash in the lines controlling the Rudder in 1> 0.5> 1 Pass T4.3 1 Location of Track Platform respective to Keel (x,y) in 0±15,0 0±10,0 13 Pass T4.4 1 Percentage of amplification of user's force input % 0< 30< 50 Pass T4.5 1 Time required to detach hands seconds 60> 30> 5 Pass T4.6 2 Angle of tilt of chair relative to horizontal plane degrees 10< 15< 20.2 Pass T4.7 3 Functioning rearview mirror Binary Yes Yes No Fail
T5.0 Rough Sailing and Worst Case Conditions
T5.1 1 Corrosion resistance Binary Yes Yes Yes Pass T5.2 1 Minimum FOS of critical elements found via analysis # 1< 3< 3.09 Pass T5.3 1 Time required to release user from seat and system minutes 10> 5> .42 Pass T5.4 1 Functioning emergency override for Rudder Binary Yes Yes Yes Pass T5.5 2 Clearance of tangle prone lines from chair swinging in 1< 4< 7 Pass MSD - P12031
18
protection
the Sonar keelboat.
parts that allow the user greater control of the boat with minimal effort exerted
MSD - P12031
19
MSD - P12031
20