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RockSat-C 2011
CoDR
CSU RocketSat-CConceptual Design Review
Colorado State UniversityIsaiah Franka Jordan Rath Abby Wilbourn Mike Yeager
10/1/101
RockSat-C 2011
CoDR
Mission Overview
• There is no way to measure fluid volumes in microgravity without introducing acceleration. Current Techniques are not cost effective and extremely inefficient.
• Our goal is to design a payload capable of accurately measuring tank ullage in a microgravity environment for use in various spacecraft.
• We want to prove that interferometry is a viable option for fluid volume measurement and can be designed to withstand the extreme environmental conditions of launch
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RockSat-C 2011
CoDR
Mission Overview: Theory and Concepts
• An optical mass gauging system equipped with a modified Michelson Interferometer was recently developed at NASA’s Marshall Space Flight Center (MSFC) and has shown to be an option to measure liquid volumes with high precision using a small lightweight system.
• For the 2009/2010 RocketSat-C launch a team of CSU students developed a payload that measured tank ullage using a Mach-Zehnder Interferometer system.– The payload was not able to withstand the required environmental
conditions and was unable to gather data during launch.
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RockSat-C 2011
CoDR
Mission Overview: Mission Requirements
• Research and develop a reliable system for fluid volume measurement in a microgravity environment.
• Submit a operational payload to Wallops Flight Facility.
• Record ullage volume accurately (within 5%)• Adhere to all requirements stated in the User
Guide.
• Pass all pre-flight reviews and tests.
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crestock.com
RockSat-C 2011
CoDR
Mission Overview: Concept of Operations
Schematic of Optical Mass Gauging System
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RockSat-C 2011
CoDR
Mission Overview: Expected Results
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• The gas cell is subjected to a pressure increase due to piston action which creates a phase shift in the light wave.
• This phase shift creates fringes when combined with the reference path beam which is then measured by the photodetector.
• These fringes can then be counted and used for calculation of the tank ullage.
RockSat-C 2011
CoDR
Design Overview: Functional Block Diagrams
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RockSat-C 2011
CoDR
Design Overview: Payload Layout
• We will be using one plate in our design; all components will be mounted on top or bottom of single plate.
• We are still in the preliminary stages of design and have not yet decided on component placement.
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classymommy.com
RockSat-C 2011
CoDR
Design Overview: RockSat-C 2011 User’s Guide Compliance
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• Based on the 2009/2010 CSU design we believe that we will be able to weigh in at or under half of the canister weight allotment of 20±0.2 lbs.
• Our payload will be designed to fill a half canister.
• Our payload will implement the standard 1.SYS.2 activation system.– RBF and G-switch setup
RockSat-C 2011
CoDR
Design Overview: Shared Can Logistics
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• We are sharing with Univ. of Minnesota (tentative)
• We plan to communicate via email and periodic phone communication.
• We are still unsure of the structural interface we will use.
• We will not need any environmental ports.
grandpmr.com
RockSat-C 2011
CoDR
Management
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• A schedule is currently being created and has not been finalized.
• Monetary budget has yet to be determined.
• Dr. Azer Yalin and Brian Lee
RockSat-C 2011
CoDR
• Our goal is to design a payload capable of accurately measuring tank ullage in a microgravity environment for use in various spacecraft.
• We are currently building a tabletop setup of our interferometer to test our concept. Once we have obtained accurate and repeatable ullage measurements we will move on to implementation into a physical payload.
Conclusion
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