IndependentlyPoor
Thinks s/he gets paid by the post
Caution: Über geek stuff
This is way cool. Watch how the rocket nozzle swivels delicately and precisely to keep the craft upright. Figuring out how to do this was one of the big stumbling blocks of making a successful rocket. (The other was keeping it from blowing up.) I believe the first to get it right were Werner von Braun and the German rocket scientists who developed the V-2 during WWII.
Armadillo Aerospace Claim Level 2 NGLLC Prize | International Space Fellowship
This is a classic problem in control theory (caution, following this link may cause your head to explode). It is what you do when you balance a pencil in your palm, but solving the equations so that you can make a machine do it stumped scientists and engineers for years.
It turns out that knowing the angle of the pencil (how far it is leaning) is not enough, you also have to know the rate of change of the angle (how fast it is falling over). In college we actually had this as a lab exercise. To simplify it for us, they made it one-dimensional: the "pencil" was hinged at the bottom and sat on a little "car" that ran along a track driven by electric motors. The mechanical apparatus was already set up for us. The problem was to design and build the a control system for the motors that would balance the "pencil". When we finally got it working it was amazing to watch. You could tap the pencil to send it rocking off balance and the "car" would go zooming off back and forth to rebalance it. Here is a video of a two dimensional one at work:
YouTube - Pencil Balancer on Changing Background
It turns out that Armadillo Aerospace is just a bunch of rich computer game geeks, playing with techno-toys. Well done guys!
This is way cool. Watch how the rocket nozzle swivels delicately and precisely to keep the craft upright. Figuring out how to do this was one of the big stumbling blocks of making a successful rocket. (The other was keeping it from blowing up.) I believe the first to get it right were Werner von Braun and the German rocket scientists who developed the V-2 during WWII.
Armadillo Aerospace Claim Level 2 NGLLC Prize | International Space Fellowship
This is a classic problem in control theory (caution, following this link may cause your head to explode). It is what you do when you balance a pencil in your palm, but solving the equations so that you can make a machine do it stumped scientists and engineers for years.
It turns out that knowing the angle of the pencil (how far it is leaning) is not enough, you also have to know the rate of change of the angle (how fast it is falling over). In college we actually had this as a lab exercise. To simplify it for us, they made it one-dimensional: the "pencil" was hinged at the bottom and sat on a little "car" that ran along a track driven by electric motors. The mechanical apparatus was already set up for us. The problem was to design and build the a control system for the motors that would balance the "pencil". When we finally got it working it was amazing to watch. You could tap the pencil to send it rocking off balance and the "car" would go zooming off back and forth to rebalance it. Here is a video of a two dimensional one at work:
YouTube - Pencil Balancer on Changing Background
It turns out that Armadillo Aerospace is just a bunch of rich computer game geeks, playing with techno-toys. Well done guys!