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vault backup: 2025-01-20 17:21:28

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Dane Sabo 2025-01-20 17:21:28 -05:00
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1 Daily Notes/2025/2025-01-20.md
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@ -29,6 +29,8 @@ where completed
group by file.name
```
# Calendar Tasks
- More 2150 [startTime:: 17:15] [endTime:: 17:45]
- Walk Lewie [startTime:: 16:30] [endTime:: 17:15]
- Lonch [startTime:: 13:00] [endTime:: 15:00]
- Writing for ME 2150 [startTime:: 15:00] [endTime:: 16:30]
- ME2046 HW1 [startTime:: 10:30] [endTime:: 13:00]

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300s School/ME 2150 - High Assurance Cyber-Physical Systems/ME 2150 - High-Assurance Cyber-Physical Systems Homework 1.md
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@ -11,7 +11,7 @@ For a wheelchair cushion to pass this standard, it must be experimentally tested
This testing fixture consists of a hydraulic press with a specific CNC-machined wooden buttocks model attached. These buttocks integrate an array of pressure sensors at a speckling of locations in order to gather a holistic understanding of the distribution of pressure on the buttocks surface. A cushion is fixed to the lower part of the hydraulic press frame. The whole system measures two main quantities: the pressure distribution on the wooden buttocks, and the total displacement of the hydraulic press.
The testing procedure Alex was specifically performing when the failure occured was a fatigue failure test. In this test,
The testing procedure Alex was specifically performing when the failure occured was a fatigue failure test. In this test, the buttocks would descend upon the cushion until a proscribed pressure is achieved on all sensors, hold for a certain amount of time, and then ascend until zero pressure is achieved again. This cycle is then repeated for a very large number of cycles. Performance of the cushion is then determined as to how the pressure distribution changes over time--more performant cushions will retain their cushioning properties for longer than less performant cushions.
The cushion was air and shit
One of the first cushions Alex was tasked with testing was a cushion that was described as being similar construction of a cheap air-mattress. Alex was instructed on how to start the test, where the E-Stop button lived, and what should be expected. Once the person instructing her left, the test began.