lunar regolith protection system dalhousie university mechanical engineering mech 4010 team #3
TRANSCRIPT
![Page 1: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/1.jpg)
Lunar Regolith Protection System
Dalhousie UniversityMechanical Engineering
MECH 4010Team #3
![Page 2: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/2.jpg)
Problem Definition• Design an apparatus or system to
protect Light Detection and Ranging System (LIDAR) instrument from regolith
• Improve upon Phoenix design• Design must function in a lunar
environment
LunarRegolithProtection System
Team #3Dec 1 2008Slide #3
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 3: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/3.jpg)
Background• LIDAR– Comprised of laser and receiver– Measures atmospheric and geomatic
properties
• Lunar Environment– 28-day lunar rotational period– 1/6 gravity of earth– No atmosphere– Extreme temperatures (max range: -
220 – 120 oC)– Micro-meteorites– High radiation
LunarRegolithProtection System
Team #3Dec 1 2008Slide #2
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 4: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/4.jpg)
Background• Regolith– Highly abrasive– Irregular shape– Abundant in lunar environment– Small particle size– Electrodynamic properties
LunarRegolithProtection System
Team #3Dec 1 2008Slide #2
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
Source: JPL/NASA
![Page 5: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/5.jpg)
Requirements• Constraints
– Withstand extreme thermal conditions– Withstand high radiation environment– Must not rely on gravity– No unvented cavities– Must not interfere with LIDAR operation
• Criteria– Minimize power requirements– Minimize weight and size– Last at least 3 months in lunar
environment– Minimal regolith accumulation on
instrument
LunarRegolithProtection System
Team #3Dec 1 2008Slide #4
BackgroundProblem DefinitionRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 6: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/6.jpg)
SMA Actuated Flexible Lid
• Roll-back lid actuated by SMA strips embedded in flexible material
• Complicated control circuitry required
LunarRegolithProtection System
Team #3Dec 1 2008Slide #5
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
Control circuitry for thin film heaters
Rolls back
![Page 7: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/7.jpg)
Modification of Original Lid
• Modify geometry to control the position and flow of dust particles
• Bulky design• Risks associated with motor hinge
LunarRegolithProtection System
Team #3Dec 1 2008Slide #6
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
Motor and hinge
![Page 8: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/8.jpg)
Magnetic Vacuum• Solenoid / Permanent magnet– Excessive loads on moving
components–Magnetic properties of regolith
are not validated
LunarRegolithProtection System
Team #3Dec 1 2008Slide #7
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 9: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/9.jpg)
Final DesignLunarRegolithProtection System
Team #3Dec 1 2008Slide #11
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 10: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/10.jpg)
Passive Protection• Lid profile• Overlapping mating surface
LunarRegolithProtection System
Team #3Dec 1 2008Slide #8
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 11: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/11.jpg)
SMA Hinge• Each hinge comprised of 3
Nitinol (55% - Ti 45% - Ni) strips (2 for closing, 1 for opening)
• Activated by thin-film heaters
LunarRegolithProtection System
Team #3Dec 1 2008Slide #9
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 12: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/12.jpg)
Active Protection• Capacitor– “Collar” located in base around
receiver– “Electric curtain”– Vacuum acts as near perfect insulator
LunarRegolithProtection System
Team #3Dec 1 2008Slide #10
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 13: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/13.jpg)
Preliminary Testing• Rapid prototyped lid and base
design• SMA wire hinge• COMSOL models of capacitor
design
LunarRegolithProtection System
Team #3Dec 1 2008Slide #12
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 14: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/14.jpg)
Current Status• Awaiting SMA strips• Improving machinability of lid
design• Developing testing plan– Lid profiles–Mating surfaces– SMA hinges– Capacitor
LunarRegolithProtection System
Team #3Dec 1 2008Slide #13
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 15: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/15.jpg)
Conclusions• Complexity of lunar
environment• Multi-layered solutions are
critical for dust protection• Design strengths– SMA hinge – Lid geometry– Active protection– Operational protocol
LunarRegolithProtection System
Team #3Dec 1 2008Slide #14
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 16: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/16.jpg)
Acknowledgements• Dr. Marie-Josée Potvin• Dr. Andrew Warkentin• Dalhousie University
Mechanical Engineering Department
• Shell Canada
LunarRegolithProtection System
Team #3Dec 1 2008Slide #15
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements
![Page 17: Lunar Regolith Protection System Dalhousie University Mechanical Engineering MECH 4010 Team #3](https://reader038.vdocument.in/reader038/viewer/2022103015/551ad0a755034656628b60e8/html5/thumbnails/17.jpg)
Questions?LunarRegolithProtection System
Team #3Dec 1 2008Slide #16
Problem DefinitionBackgroundRequirementsAlternative DesignsFinal DesignPreliminary TestingCurrent StatusConclusionsAcknowledgements