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Integrated System Build & Test

Table of Contents 1 Team Vision for Integrated System Build & Test Phase 2 Test Results Summary 3 Integrated System Updates 3.1 ME Updates 3.2 EE updates 4 Risk and Problem Tracking 4.0.1 link to Risk Management [[Detailed Design Documents/Risk Management Detailed Design.xlsx| here]] 5 Plans, Lessons Learned, and Imagine 5.0.1 link to Paper Draft [[Detailed Design Documents/Tech_paper_draft.docx | here]] 5.0.2 link to Poster Draft [[Detailed Design Documents/imagine poster real.pptx | here]]

Team Vision for Integrated System Build & Test Phase

• Phase goals: Integrate all subsystems to get a functional build, complete requirement verification tests

• Phase achievements: Integrated all subsystems to get a functional build with some issues, completed most critical test plans and identified some problem areas

Test Results Summary

TP_summary

Integrated System Updates

ME Updates

Updated TVA: A new TVA mass was machined from steel to function as a prototype for testing before the final stainless steel mass is fabricated. The mass was designed to weigh 0.765 kg, which gives a target vibration frequency of 11.4 Hz. After machining the mass was weighed to be 0.755 kg. 10 extra grams were taped on during testing to account for the difference.

TVA shipping pin:

The TVA shipping pin and plastic insert designs functions to prevent any displacement of the TVA during shipping. With the insert in place and the bolt hand-tightened, all motion of the TVA is prevented, even under vigorous shaking. The plastic insert needs to be 3D printed again to better fit the new TVA design.

Piston arrester: Tested the use of extra foam (from Pelican cases) stuffed into the open end of the piston. This method held the piston head in place, even under vigorous shaking. When loaded in the cases for shipping, the acrylic cover would keep the foam from falling out of the piston tube. While all motion of the piston head was stopped, there was some small motion of the flywheel (~1/4" displacement) under vigorous shaking. This was deemed to be acceptable by the team.

Link to Test Plan document

EE updates

• latest GUI iteration

• New Electronics Box

Newbox_3

• Problems Faced :

1. Accelerometer data was not centered in graph Solution: was to normalize the data rather than simply subtracting the offset.

2. Motor control is not working. Solution: we have not resolved this problem yet.

3. GUI is not updating the graph Solution: we have not resolved this yet.

4. The cables are not robust enough to withstand bending Solution: We have thought of several ideas and will likely need to remake cables with non-solid core wire. We have ideas for wrapping the existing wires in heat shrink, then automotive wrap and then a mesh sleeve.

Risk and Problem Tracking

link to Risk Management here

Plans, Lessons Learned, and Imagine

link to Paper Draft here

link to Poster Draft here

Goals For next phase :

• Finish test plans
• Complete poster and paper
• packaging plan completion
• successful matlab executable

Lessons Learned:

• Machine critical parts sooner which allows more time for critical verification tests
• Prototype/perform tests more frequently to have a timeline of data for each change instead of "lumps" of data for major changes

Improvements:

• Frequently updating schedule allowed better communication of team expectations and better time management
• Creation of drawing tracking spreadsheet allowed for better assessment of drawing creation tasks

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