meen475 honda walking assist
TRANSCRIPT
Honda Walking Assist
MEEN 475-502 Jorge Acosta, Ryan Broeckelmann, Charles McStravick, Keegan Smith,
Grant Tollette
Background●In the US, over 17 million individuals
have walking disabilities
●There are approximately 7,800 spinal cord injuries per year
○ Resulting in approximately 4,000 newly paraplegic and 3,800 newly quadriplegic individuals each year
●In addition, over 50 million individuals are diagnosed with Arthritis
○ Approximately 1 in 6 of these individuals, or 8.3 million individuals, express difficulty walking
Honda Walking Assist Device
Back SupportFunction ● Support plate
● Protect battery
Constraints ● Plate Dimensions● σf > 0.5 MPa
Objective ● Minimize Mass ● Minimize Cost● High Strength
Free Variables
● Choice of Material● Process Selection
Material Selection 6061 Aluminum Polyethylene ABS Nylon
Material Analysis of BackplateAHP Rankings
Material Score
6061 Al 0.363
PE100 0.236
ABS 0.214
Nylon 0.235
LegsFunction ● Support leg weight
● Transmit power to user
Constraints ● Dimensions of legs● σf > 0.5 MPa● Cannot Buckle
Objective ● Minimize mass● Minimize Cost● Maximize Strength
Free Variables
● Choice of material● Process Selection
Material Selection 6061 Aluminum Polyethylene ABS Nylon
Material Analysis of LegsAHP Rankings
Acceptable confidence ratio value of .06
Material Score
6061 Al 0.436
PE100 0.159
ABS 0.193
Nylon 0.212
Manufacturing Process for BackplateChosen process: Injection Molding
Manufacturing Process for LegsChosen process: Die casting
ConclusionBack Support
Nylon
Legs6061 Aluminum
Referenceshttp://www.honda.com/mobility/walking-assist-technology
https://www.disabled-world.com/disability/statistics/census-stats.php
http://polymerdatabase.com/polymer%20classes/Polyamide%20type.html
http://mech.vub.ac.be/teaching/info/Ontwerpmethodologie/Appendix%20les%203%20Materiaal%20Indices.pdf
http://www.grantadesign.com/download/pdf/teaching_resource_books/2-Materials-Charts-2010.pdf