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3229953f
Commit
3229953f
authored
May 14, 2024
by
Neil Gershenfeld
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<div
style=
"font-size: 120%; margin-left: 2.5%;"
>
<pre><font
face=
"bitstream vera sans,arial,helvetica,sans-serif"
>
<b><a
href=
dis/index.html
>
system disintegration
</a></b>
<b><a
href=
dis/index.html
>
system dis
-
integration
</a></b>
<b>
failure modes
</b>
<i>
mechanical
</i>
loads beyond the elastic limit
cracking at stress concentration, fillets
fasteners loosening, vibration, thread locks
<a
href=
https://cba.mit.edu/docs/papers/24.01.MIPS.pdf
>
cracking at stress concentration, fillets
</a>
<a
href=
https://www.cnet.com/reviews/makerbot-replicator-review/
>
fasteners loosening, vibration, thread locks
</a>
stripped threads
misalignment, binding, flexures
dynamic instability
(Tacoma narrows)
<a
href=
https://mtm.cba.mit.edu/2011/2011_mtm-snap/mtm_snap-lock/index.html
>
misalignment, binding, flexures
</a>
<a
href=
https://www.wsdot.wa.gov/tnbhistory/collapse.htm
>
dynamic instability
</a>
<i>
wiring
</i>
ripping up PCB traces
pulling wires out of connectors, strain relief
pulling wires out of connectors
<a
href=
https://www.amazon.com/s?k=strain+relief
>
strain relief
</a>
polarized connectors
insulation abrasion, dielectric breakdown
(A380)
<a
href=
https://hackaday.com/2018/04/04/kapton-miracle-material-with-a-tragic-history/
>
insulation abrasion, dielectric breakdown, shorts
</a>
<a
href=
https://gitlab.cba.mit.edu/jakeread/ratchet/-/raw/master/old-ratchet/log/2020-05-31_ratchet-hip.jpg
>
wire guides
</a>
<a
href=
https://www.nytimes.com/2006/12/11/business/worldbusiness/11iht-airbus.3860198.html
>
wire harnesses
</a>
<i>
components
</i>
MOSFET over-voltage, current, temperature
inductive flyback, reverse protection diodes
regulator reverse polarity
processor over-voltage, GPIO current source, sink
EMI shielding
current limiting
<a
href=
https://www.digikey.com/en/products/filter/tvs-diodes/144
>
transient protection
</a>
<a
href=
https://www.seymourduncan.com/blog/installation-setup/how-to-shield-a-guitar
>
EMI shielding
</a>
<i>
power
</i>
budget, supply compliance
batteries, lifetime
48v supply to 24V input
(JMM)
<a
href=
https://www.lunyeecnc.com/products/lunyee-3018-pro-max-cnc-router-laser-2-in-1-machine
>
48v supply to 24V input
</a>
transient noise, processor faults
wiring resistance, inductance
bypass capacitors
ground loops, mecca
<i>
software
</i>
memory leaks
buffer overruns (heartbleed)
variable scope
<a
href=
https://www.vox.com/2014/6/19/18076318/heartbleed
>
buffer overflow
</a>
race conditions
object, module interfaces
dependencies (SSH)
variable scope
object interfaces
<a
href=
https://arstechnica.com/information-technology/2021/09/npm-package-with-3-million-weekly-downloads-had-a-severe-vulnerability/
>
dependencies
</a>
<a
href=
https://www.okta.com/identity-101/security-through-obscurity/
>
obscurity
</a>
<i>
scaling
</i>
O(?)
phase transitions in complexity
<a
href=
https://fab.cba.mit.edu/classes/MAS.864/
>
O(?)
</a>
<a
href=
https://www.nature.com/articles/22055
>
phase transitions in complexity
</a>
<i>
manufacturing
</i>
supply chains (pandemic car factories)
capacity
<a
href=
https://www.cnbc.com/2021/02/11/how-covid-led-to-a-60-billion-global-chip-shortage-for-automakers.html
>
supply chains
</a>
<a
href=
https://www.economist.com/business/2022/07/10/after-a-turbocharged-boom-are-chipmakers-in-for-a-supersize-bust
>
capacity
</a>
<i>
collaboration
</i>
data interchange
(Mars)
<a
href=
https://www.simscale.com/blog/nasa-mars-climate-orbiter-metric/
>
data interchange
</a>
<i>
fail fast
</i>
(SpaceX)
feed-forward vs feedback development
<a
href=
https://www.cnbc.com/2023/07/26/boeing-has-lost-1point5-billion-developing-starliner-spacecraft-for-nasa.html
>
feed-forward
</a>
<i>
vs
</i>
<a
href=
https://www.space.com/every-spacex-starship-explosion-lessons-learned
>
feedback
</a>
development
<b>
packaging
</b>
PCB mounting
mechanism alignment
fasteners, standoffs, flexures
wire routing, cable management, flex interconnect
surface finish
wire routing
<a
href=
https://help.prusa3d.com/guide/4-z-axis-assembly_67704
>
mechanism alignment
</a>
<a
href=
https://fabacademy.org/2024/labs/skylab/group_assignment/week12/
>
surface finish
</a>
<b>
design
</b>
PCs vs
Macs
<a
href=
https://www.peppercontent.io/blog/apple-design-history/
>
PCs
<i>
vs
</i>
Macs
</a>
<i><a
href=
Jan.pdf
>
UX, user experience
</a></i>
<i>
DFM (Design for Manufacturing)
</i>
vendors
BOM
budget
component selection
<i><a
href=
https://www.disher.com/blog/design-for-manufacturing/
>
DFM (Design for Manufacturing)
</a></i>
standard components
(near) net shape
flexures
vs
fasteners
,
adhesives
self-aligning features
minimize parts
process selection
, scaling
flexures
<i>
vs
</i>
fasteners
<i>
vs
</i>
adhesives
<a
href=
https://mtm.cba.mit.edu/2011/2011_mtm-snap/mtm_snap-lock/index.html
>
self-aligning features
</a>
<a
href=
https://www.theverge.com/2023/9/14/23873345/tesla-gigapress-gigacasting-manufacturing-breakthrough
>
minimize parts
</a>
<a
href=
https://www.youtube.com/watch?v=zdv6MlFlOrA
>
process selection
</a>
<i>
documentation
</i>
construction
production
design files
<a
href=
https://github.com/openscopeproject/InteractiveHtmlBom
>
BOM
</a>
<a
href=
https://wiki.freecad.org/OSH_Automated_Documentation
>
production
</a>
operation
<b>
testing
</b>
Quality Assurance
(QA
)
Quality Control
(QC
)
QA (
Quality Assurance
, defect prevention
)
QC (
Quality Control
, defect detection
)
burn-in
cycling
environmental
fuzzing
<a
href=
https://about.gitlab.com/topics/devsecops/what-is-fuzz-testing/
>
fuzzing
</a>
<b>
lifecycle
</b>
<a
href=
https://pirg.org/campaigns/right-to-repair
>
(right to) repair
</a>
disassembly, reuse, recycling
<a
href=
https://environment.ec.europa.eu/topics/waste-and-recycling/end-life-vehicles_en
>
end of life
</a>
<b><a
href=
https://archive.fabacademy.org/archives/2016/fablabtorino/students/440/project/
project
.html
>
assignment
</a></b>
<b><a
href=
https://archive.fabacademy.org/archives/2016/fablabtorino/students/440/project/
P02/B2/electronics
.html
>
assignment
</a></b>
Design and document the system integration for your final project
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