Difference between revisions of "See animations pertaining to space elevator construction deployment"

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OVERVIEW
OVERVIEW


This is one of many schemes that have been put forth to accomplish deployment of the space elevator. It starts with a large satellite positioned at GEO. The satellite (likely having been constructed from components delivered to GEO via many conventional rocket launches) contains:  
This is one of many schemes that have been put forth to accomplish deployment of the space elevator. It starts with a large satellite positioned at GEO. This GEO object (likely having been constructed from components delivered to GEO via many conventional rocket launches) contains:  


1. The Ribbon,  
1. The Ribbon,  
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3. The ''Upper satellite'' that manages ribbon deployment, it's own guidance and control, and is destined to become the ''ballast mass'' for the space elevator.
3. The ''Upper satellite'' that manages ribbon deployment, it's own guidance and control, and is destined to become the ''ballast mass'' for the space elevator.


These two end-satellites perform a delicate ''control dance" as the ribbon deploys downward from GEO; as the lower satellite progressively moves into the Earth's gravity well  ever increasing magnitude (thus creating downward force on the system), the upper satellite must move to ever higher altitudes creating a correspondingly greater centrifugal force to counter the increasing gravity.
As the ribbon deploys downward from GEO, the two end-satellites perform a delicate ''guidance and control dance", to wit: as,
 
- the lower satellite progressively moves into the Earth's gravity well  ever increasing magnitude (thus creating downward force on the system),  
- the upper satellite must move to ever higher altitudes creating a correspondingly greater centrifugal force to counter the increasing gravity pull.
 
The series of animations below depict the natural tendencies of such a process,  as well as portrays examples of control schemes that produce failure modes, and finally, depicts how the deployment would look when successfully accomplished.


[[http://www.youtube.com/watch?v=gS6zcY2fQis Natural Tendencies]]
[[http://www.youtube.com/watch?v=gS6zcY2fQis Natural Tendencies]]

Revision as of 23:01, 15 December 2008

SPACE ELEVATOR DEPLOYMENT/CONSTRUCTION FROM AN INITIAL GEO ORBIT

OVERVIEW

This is one of many schemes that have been put forth to accomplish deployment of the space elevator. It starts with a large satellite positioned at GEO. This GEO object (likely having been constructed from components delivered to GEO via many conventional rocket launches) contains:

1. The Ribbon,

2. The Lower satellite that is the earth-seeking guidance and control module, that delivers the bottom of the ribbon to its anchor point, and,

3. The Upper satellite that manages ribbon deployment, it's own guidance and control, and is destined to become the ballast mass for the space elevator.

As the ribbon deploys downward from GEO, the two end-satellites perform a delicate guidance and control dance", to wit: as,

- the lower satellite progressively moves into the Earth's gravity well ever increasing magnitude (thus creating downward force on the system), - the upper satellite must move to ever higher altitudes creating a correspondingly greater centrifugal force to counter the increasing gravity pull.

The series of animations below depict the natural tendencies of such a process, as well as portrays examples of control schemes that produce failure modes, and finally, depicts how the deployment would look when successfully accomplished.

[Natural Tendencies]