MajorChallenges: Difference between revisions

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== Major SE Challenges ==
== Major SE Challenges ==
#'''Energy in ribbon '''
#'''[[RibbonEnergy| Energy in ribbon]] '''
## As a material is stretched it stores energy.  In the case of the SE this energy can be released quickly when the ribbon is damaged.
## As a material is stretched it stores energy.  In the case of the SE this energy can be released quickly when the ribbon is damaged.
## The question is where does the energy go?  Is the CNT thread and even the ribbon vaporized or does it go elsewhere?  Can we control where it goes to minimize the damage.
## The question is where does the energy go?  Is the CNT thread and even the ribbon vaporized or does it go elsewhere?  Can we control where it goes to minimize the damage.
## Detailed material’s science and engineering are required to address this issue.
## Detailed material’s science and engineering are required to address this issue.
## A detailed computer model is likely needed
## A detailed computer model is likely needed
#'''Optimal ribbon design'''
#'''[[RibbonDesign| Optimal ribbon design]]'''
## Minimize mass /  Maximize strength
## Minimize mass /  Maximize strength
## Maximize resistance to damage
## Maximize resistance to damage
#'''Splicing '''
#'''[[RibbonSplicing| Splicing]] '''
## Full engineering designs and implementation scenarios are required for splicing ribbons during deployment.
## Full engineering designs and implementation scenarios are required for splicing ribbons during deployment.
#'''Experimental tests of ribbon in atomic oxygen'''
#'''[[Atomic Oxygen| Experimental tests of ribbon in atomic oxygen]]'''
## With and without metal coating
## With and without metal coating
## Evaluate strength vs  exposure
## Evaluate strength vs  exposure
#'''Radiation protection for humans in transit'''
#'''[[RadProtection| Radiation protection for humans in transit]]'''
## Start with Ander’s work and evaluate extent of issue
## Start with Ander’s work and evaluate extent of issue
## Outline potential solutions
## Outline potential solutions
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##* Passive shielding
##* Passive shielding
## Work out a scenario using solutions to  allow humans to transit on elevator
## Work out a scenario using solutions to  allow humans to transit on elevator
#'''Climber tracking'''
#'''[[ClimberTracking| Climber tracking]]'''
## Requires fairly complex mechanical simulation with forces
## Requires fairly complex mechanical simulation with forces
## Focus on passive roller design – canted rollers, non-straight cylinders
## Focus on passive roller design – canted rollers, non-straight cylinders
#'''Spooling of initial ribbon for launch'''
#'''[[Spooling| Spooling of initial ribbon for launch]]'''
## Determine standard ribbon spooling techniques and compare to what  we need
## Determine standard ribbon spooling techniques and compare to what  we need
#'''Detailed modeling of ribbon degradation lifetime'''
#'''[[RibbonDegradation| Detailed modeling of ribbon degradation lifetime]]'''
## Full modeling of impacts, radiation , lightning, wear, UV, …
## Full modeling of impacts, radiation , lightning, wear, UV, …
#'''Ribbon attachment mechanism'''
#'''[[RibbonAttachment| Ribbon attachment mechanism]]'''
## Auto tensioning
## Auto tensioning
## Spooling out and in
## Spooling out and in
#'''Full system design of climber'''
#'''[[ClimberSystem| Full system design of climber]]'''
## Rollers
## Rollers
## Structure
## Structure
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## Solar Cells
## Solar Cells
## Get commercial parts
## Get commercial parts
#'''Full budget analysis of operations. '''
#'''[[FullBudget| Full budget analysis of operations.]] '''

Revision as of 21:37, 4 July 2008

Major SE Challenges

  1. Energy in ribbon
    1. As a material is stretched it stores energy. In the case of the SE this energy can be released quickly when the ribbon is damaged.
    2. The question is where does the energy go? Is the CNT thread and even the ribbon vaporized or does it go elsewhere? Can we control where it goes to minimize the damage.
    3. Detailed material’s science and engineering are required to address this issue.
    4. A detailed computer model is likely needed
  2. Optimal ribbon design
    1. Minimize mass / Maximize strength
    2. Maximize resistance to damage
  3. Splicing
    1. Full engineering designs and implementation scenarios are required for splicing ribbons during deployment.
  4. Experimental tests of ribbon in atomic oxygen
    1. With and without metal coating
    2. Evaluate strength vs exposure
  5. Radiation protection for humans in transit
    1. Start with Ander’s work and evaluate extent of issue
    2. Outline potential solutions
      • Speed
      • Active shielding
      • Passive shielding
    3. Work out a scenario using solutions to allow humans to transit on elevator
  6. Climber tracking
    1. Requires fairly complex mechanical simulation with forces
    2. Focus on passive roller design – canted rollers, non-straight cylinders
  7. Spooling of initial ribbon for launch
    1. Determine standard ribbon spooling techniques and compare to what we need
  8. Detailed modeling of ribbon degradation lifetime
    1. Full modeling of impacts, radiation , lightning, wear, UV, …
  9. Ribbon attachment mechanism
    1. Auto tensioning
    2. Spooling out and in
  10. Full system design of climber
    1. Rollers
    2. Structure
    3. Motors
    4. Electronics
    5. Solar Cells
    6. Get commercial parts
  11. Full budget analysis of operations.
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