Cubesat 10x10x10cm 1kg Payload, Lets here it then... |
Cubesat 10x10x10cm 1kg Payload, Lets here it then... |
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#1
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![]() Member ![]() ![]() ![]() Group: Members Posts: 562 Joined: 29-March 05 Member No.: 221 ![]() |
I'm sure many of you will be familar with the CubeSat project, in fact some of you may well have worked on one.
![]() So lets hear it, what would you do with a 10x10x10cm 1kg payload in a CubeSat, beside the obvious like stick a camera in it and photograph your house. Who knows, perhaps one day we may see the launch of the USF CubeSat ![]() |
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#2
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 ![]() |
Having it intelligent enough to know which way to point is easy
GETTING it to point in that direction is hard. micro-gyros are expensive, electromagnetic stabilisation is slow. Doug |
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#3
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![]() Member ![]() ![]() ![]() Group: Members Posts: 345 Joined: 2-May 05 Member No.: 372 ![]() |
QUOTE (djellison @ Sep 17 2005, 02:21 PM) Having it intelligent enough to know which way to point is easy GETTING it to point in that direction is hard. micro-gyros are expensive, electromagnetic stabilisation is slow. Doug For the sun, all it needs is a sun-sensor and some way to spin to the right orientation, possibly mini reaction wheels. I don't think it would really need gyros. How about this: 5 very low precision sun position sensors (just a light-sensitive chip), one for every side but the front; 1 low precision sun position sensor (a fisheye lens and a ccd); 1 medium precision sun position sensor (a medium focal length lens and a ccd); and the final positioning will be done with the telescope itself. And yes, I have loads of faith in modern miracles of miniaturization. ![]() |
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#4
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239 ![]() |
QUOTE (um3k @ Sep 17 2005, 08:05 PM) For the sun, all it needs is a sun-sensor and some way to spin to the right orientation, possibly mini reaction wheels. I don't think it would really need gyros. How about this: 5 very low precision sun position sensors (just a light-sensitive chip), one for every side but the front; 1 low precision sun position sensor (a fisheye lens and a ccd); 1 medium precision sun position sensor (a medium focal length lens and a ccd); and the final positioning will be done with the telescope itself. And yes, I have loads of faith in modern miracles of miniaturization. ![]() As a technology demonstrator, something that can seek the Sun is probably about as easy as you can get - and I'd think in terms of light-sensitive diodes, not even chips! You're talking about an analog control system, or possibly something which might be considered as a neural network, with 'learning' to account for biased inputs. The HDU gyro idea seems like an ideal reaction control method, too - but you'll still need to de-spin at some point. Perhaps a gravity gradient default attitude would do the job, but that might require a boom - and I don't much like moving parts (spinning, that's fine!). If the system works, apply it to the next satellite... -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!
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