Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Needed dampers too expensive to be viable - focus on secondary designs
Possibility - rely on friction damping (possible due to relatively low speed of wheelchair) and springs
May also use foam material to cushion user against arm bar instead
Ordered seat belt as a backup restraint system
Ordered other needed parts to assemble arm bar
Accomplishments from Previous Week
Found specific parts to use in final design
Goals for Next Week (list names after each item). Use specific and measurable objectives.
CAD connection points for parts (Zoe, Andrew)
Work on report (Mark, Ang)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
4/24, in person
Concerns that a spring/damper system is not optimal for the design conditions
Will purchase parts for us if we email him what we need
4/27, in person
Reiterated will purchase parts if we email him
4/29, email
Requested a list of members and individual assigned/completed tasks by 4/30
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
4/25, in person
Team needs more meetings/more communication between each others' responsibilities
Always bring relevant information to meetings
4/28, email
Report:
Specify our contribution
Expand on existing solutions
Restructure impact on society section
4/30, in person
Report:
Add existing solutions for arm bars
Group impact on society sections by economical, social, etc.
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
N/A
Risks and Areas of Concern
Unable to find cheap shock absorber (damper) - cheapest found was ~$130, which is too much given a budget of $1000, most of which goes to sensor technology
Resources or Information Required but not Available
Cheap (<$50) dampers
Engineering standards locked behind paywalls
Schedule
Prepare to make first prototype:
Order parts
CAD connection points
Budget (list amount spent and amount remaining)
1. Two 1 ft Rods for armbar ($9.73 each)
2. Two Compression Springs ($6.75 each)
3. Two Steel Extension Spring ($15.04 each)
4. Cotton balls ($11.99 for 1000)
5. Memory Foam ($18.77 for 1/2"Hx22W"x22L")
6. Latch ($8.49)
Progress on Report and Webpage
Made edits according to instructor comments
Finish up first draft