HiRel/CanSat

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(Demonstrator)
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= Demonstrator =
 
= Demonstrator =
This is a demonstrator of the CanSat for use in the HES-SO MSE HiRel module.
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This is a demonstrator of the CanSat for use in the HES-SO MSE [[HiRel|HiRel]] module.
  
 
== Layout ==
 
== Layout ==
 +
 
The first big question to solve is, how to get as much PCB real-estate out of such a limited and unusual satellite form-factor.
 
The first big question to solve is, how to get as much PCB real-estate out of such a limited and unusual satellite form-factor.
 
We decided to go for a vertical solution with 5 PCBs.  
 
We decided to go for a vertical solution with 5 PCBs.  
 
Furthermore we like to have all PCBs of the same size.
 
Furthermore we like to have all PCBs of the same size.
 
This means that the they will be aligned along the central axis in the form of a star or a pentagon.
 
This means that the they will be aligned along the central axis in the form of a star or a pentagon.
To find the optimal solution we simulated all the possibilities in between these two geometrical figures.
+
To find the optimal solution we investigated all the possibilities in between these two geometrical figures.
  
 
[[File:Pcb 5 angles.svg|center]]
 
[[File:Pcb 5 angles.svg|center]]

Revision as of 17:03, 23 December 2014

Contents

The CanSat is a micro-satellite used for student competitions to educate the whole development chain from design until launch of space equipment.

The CanSat has the form of a soda can with a diameter of 66 mm and a height of 115 mm. The weight is limited to 350 g.

Demonstrator

This is a demonstrator of the CanSat for use in the HES-SO MSE HiRel module.

Layout

The first big question to solve is, how to get as much PCB real-estate out of such a limited and unusual satellite form-factor. We decided to go for a vertical solution with 5 PCBs. Furthermore we like to have all PCBs of the same size. This means that the they will be aligned along the central axis in the form of a star or a pentagon. To find the optimal solution we investigated all the possibilities in between these two geometrical figures.

Pcb 5 angles.svg

The biggest PCB board surface is attained at an offset of 18° from the pentagon.

TBD: insert image with curve

These boards will be hold in place and connected together with two round boards, one on top and one on the bottom.

TBD: insert 3D image/photo

Standard 2x6 pin connectors compatible to the Pmod™ serve as electronic as well as mechanical connection.

Vertical Boards

The boards hold the following components:

  1. an FPGA
  2. a microprocessor
  3. an XBEE module
  4. sensors
  5. a power converter

The FPGA board serves as master (or as a router) and therefore connects to all other boards through 4 double Pmods, two on the bottom side and two on the top side. Each of the slave boards connects to the FPGA board through 2 Pmods, one on each side.

Interconnect Boards

Both interconnect boards share the same layout, but with the connectors mounted on the inverse side. Each one of the four 6 pin connectors on the master board connect to exactly one slave board.

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