- Read Through Active Cooling Systems Angelina Costa Izaan Rizvi Dustin Wang Kareena Shah Katherine Diaz Govea Â
- Research encoders and note potential controls system needed to correct angle Angelina Costa Izaan Rizvi Dustin Wang Kareena Shah Katherine Diaz Govea Â
Quick TLDR
What We Covered
Reviewed active and passive thermal control systems.
Discussed encoder types and angle-fixing mechanisms.
Saturday Objective
Read four NASA active thermal systems by Saturday (https://www.nasa.gov/smallsat-institute/sst-soa/thermal-control/#7.3.2)
Research encoders and compatible mechanical positioning systems by Saturday as well (https://docs.google.com/document/d/1QqiHvV6kmdsQS3tjf9hYZ2kM215mnp_SR3qzB6RirYY/edit?usp=sharing)
- Finalize clearer sub-team objectives together on Saturday
Ask questions anytime—we’re all learning together.
Active Cooling Systems
- Combination of fluid loops and TECs
- TECs are potentially COTS (~$50)
- Need to select fluid loop type (single-phase, two-phase, mechanically pumped..)
- TEC based thermal control system for optical payloads research paper: https://www.sciencedirect.com/science/article/abs/pii/S1359431123001308
Passive Cooling Systems
Thermal Straps
- Conductively transfer heat
- Doesn't add structural loads
- Blocks at ends of strap to be mounted
Thermal Louvers
- Regulate heat dissipation
- Function as shutters
- Typically associated with larger mass and power input
Deployable Radiators
- Dedicated surface for dissipating excess heat
- Stowed during transit and deployed when needed
MLI/Tapes/Film/Etc.
- Probably not helpful because would interfere with sun radiation (used to stratify temp)
Potential Encoder - PID System
Could potentially look into a proportional–integral–derivative (PID) controller system that would use tick marks based off of the encoder system readings to help align us correct our angle.
Look into encoder systems and understand how they work at a base level
https://docs.google.com/document/d/1QqiHvV6kmdsQS3tjf9hYZ2kM215mnp_SR3qzB6RirYY/edit?usp=sharing