P20129: Flight-Ready Heat Switch
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Customer Handoff & Final Project Documentation

Table of Contents

Team Vision for Final Demo and Handoff

With the onset of the Covid-19 pandemic, the team's vision had to be shifted since the team was unable to meet and perform testing in the cryogenics lab. Therefore, the team's goals changed from creating a prototype that operates perfectly and testing every facet of the prototype to allowing a future team to finish the prototype and then continue testing to prove that it is flight ready. The team completed all documentation required so a future team can pick up the project with ease.

Test Results Summary

The solenoid was first tested without any modifications or cleaning regiments, resulting in that it could operate at cryogenic temperatures, but it was cooled to only 105 K and not the target temperature of 77 K. This was due to the supply of liquid nitrogen running out and our sponsor ordering more, putting a hold on testing. In the next round of testing, the solenoid was sonicated in isopropyl and then dry molybdenum lubrication was applied. This resulted in the solenoid operating at a lower temperature of 93.8, closer to the target cryogenic temperature, but the solenoid did not actuate at random temperatures creating inconsistencies during the testing. However, after analyzing the solenoid and deciding the inconsistencies were caused by isopropyl freezing within the solenoid, testing progressed. After disassembling the solenoid and drilling out the shaft slide, the final test resulted in the solenoid actuating at 82 K and then remaining stuck open even after heating up, resulting in the end of cryogenic testing. This was the last test performed before RIT's campus was closed for the 2020 Spring semester. This testing was not only able to test the cryogenic reliability of the solenoid, but also proved that the non-ferrous design could fit within the designated prototype packaging and that the heats witch could operate in a vacuum, meeting most engineering requirements. The PCB was also able to fulfill it's given functions of controlling the heat switch and is setup so a future team can decide to make minimal changes and directly begin work on a flight ready version.

The fully detailed modifications, testing setups, and results can be found here: Solenoid Testing Results

Risk and Problem Tracking

Phase VII Risk Assessment

Phase VII Risk Assessment

Risk Management
Problem Tracking

Problem Tracking

Problem Tracking.

Final Project Documentation

Final CAD

Final CAD

Final Schematics

Final Schematics

Final PCB Rev-B

Final PCB Rev-B

Additional Documentation


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