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USC. U T I L I Z A T I O N • E V O L U T I O N • LIFE-EXTENSION. Debris Mitigation System and New Service Module. International Space Station:. Title of Your Specific Project Name E-mail Address ASTE 527 December 15, 2009. Edward Nicoloso [email protected] ASTE 527 - PowerPoint PPT PresentationTRANSCRIPT
International Space Station:
Title of Your
Specific Project
NameE-mail Address
ASTE 527
December 15, 2009
USC
Edward [email protected]
ASTE 527
December 15, 2009
Debris Mitigation System and New Service Module
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Overview
• Problems and Failures in Space
• Debris Mitigation System
• The New Service Module
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Problems and Failures in Space
• A Triple-Redundant Space Station Computer– Controls the station’s orientation and manages oxygen
production– A dehumidifier exhausted moisture-laden air onto the
power boxes for the system– The entire system shut down, proving that this triple-
redundant system has single point failures.
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Problems and Failures in Space
• Control Moment Gyros (CMG)– When the Gyros are completely saturated thrusters are used
to take away the saturation. – Two of the four Gyros have failed multiple times, causing
them to use more fuel with thrusters
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Problems and Failures in Space
• Fire on Mir– A leak in the Solid-Fuel Oxygen canisters caused a
chemical reaction in the canister and turned it into a giant blow torch.
– The fire blocked an emergency escape on one of the Soyuz Spacecraft.
– These oxygen canisters are being used on ISS and a fire would again block an emergency escape into one of the Soyuz capsules.
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Problems and Failures in Space
• Collision with Progress on Mir– Wires had to be cut so the crew work close hatches. This
meant that the astronauts and cosmonauts had to work in the dark.
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Problems and Failures in Space
• Micrometeorites and Orbital Debris– There have already been close calls
where orbital debris could have significantly damaged the station.
– A bullet-sized hole, caused by a meteorite, was found on the protective panels.
– ISS Debris Avoidance Maneuvers(DAM) are both time and fuel consuming
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Problems and Failures in Space
• Orbital Debris Statistics – 17,300 artificial orbiting objects
of 10 centimeters or larger are being tracked
– Estimated 500,000 smaller fragments in orbit
– Amount of space debris has risen by 40% in the past four years
• Protective panels can only withstand collisions with debris up to 1 cm in size
USC
(Data from the Space Surveillance Network )
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Debris Mitigation System
• All Gas-Phase Iodine Laser (AGIL)– All chemicals are in the gaseous phase, making them
lighter and easier to work with in microgravity. – AGIL uses a reaction of Chlorine atoms with gaseous
hydrazoic acid, resulting in excited molecules of nitrogen chlorine, which then passes their energy to the iodine atoms. The iodine atoms then emit the laser radiation.
• Alternatively, CO2 Laser– Operating at 10.6microns, not attenuated by atmosphere
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Debris Mitigation System Study-1
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Debris Mitigation System
• Location:– Connected to the Zvezda module,
where the Science Power Platform would have been located.
• Function:– Used to deflect orbital debris and
micrometeorites up to 10cm in size away from the space station
– Powered by a battery and separate
solar panel system from the rest of the station.
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ISS DMS-Merits and Limitations
• Merits– Space based system is more effective– Uses Space Science Platform Hooks and scars– Quick to deploy– Use to eliminate direct threats to ISS as well as deorbit
debris in ISS/LEO orbital regime.
• Limitations– Could be misconstrued as space-based weapon
– Coordination with ISS Board needed for use– Careful not to affect ISS other assets in range
New Service Module
• Design would include:– Extra docking station for a Soyuz Spacecraft that could be
used in an emergency evacuation– Docking location for the shuttle– An attitude control system for the station. This one would
back-up or assist the one on the Zvezda module– Emergency power supply to power the station in case of a
failure or to help power the AGIL.
• Located where the Shuttle docks
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New Service Module
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Conclusion
• It is not a matter of “if,” but “when” debris will strike the station.
• After ten years of service, systems are going to fail or malfunction.
• The cost of ISS approaching 150 billion dollars.
• It truly represents how nations of completely different backgrounds and beliefs can come together, work together, and live together, employing the finest technologies that humanity could muster.
• Are we really willing to throw something like this away?!
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