A flat, specular sail for GEO simulations.

The vertices and faces for a simple square are defined by hand.

Since version 7.
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See also BuildCADModel, CreateBody, CreateComponent, DrawSCPlanPlugIn,
Inertias, FindDirectory, SaveStructure, AddAxes
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Contents

%-------------------------------------------------------------------------------
%  Copyright (c) 2006 Princeton Satellite Systems, Inc. All rights reserved.
%-------------------------------------------------------------------------------

Script control

%---------------
createFiles = 1;

Properties

%-----------
sailWidth     = sqrt(2000);
sailMass      = 50.0;
massBus       = 450;

Create the sail mass structure

%-------------------------------
inertiaSail   = Inertias( sailMass, [sailWidth sailWidth], 'plate', 1 );
bXToZ         = [0 0 -1;0 1 0;1 0 0];
massSail      = struct('inertia', bXToZ*inertiaSail*bXToZ', 'mass', sailMass, 'cM', [0;0;0] );

Initialize

%-----------
BuildCADModel( 'initialize' );

Add general properties

%-----------------------
BuildCADModel( 'set name' ,  'Flat Sail GEO' );
BuildCADModel( 'set units',  'mks'  );

%------------------------------------------------------------------

Create CAD bodies first

%------------------------------------------------------------------

Core

%-----
m = CreateBody( 'make', 'name', 'Core' );
BuildCADModel('add body', m );

This creates the connections between the bodies

%------------------------------------------------
BuildCADModel( 'compute paths' );

%------------------------------------------------------------------

Create CAD Components second

%------------------------------------------------------------------

Sail

%-----
v = [0 0 0 0;0.5 -0.5 -0.5 0.5;0.5 0.5 -0.5 -0.5]'*sailWidth;
m = CreateComponent( 'make', 'sail','name','Sail','body',1,...
                     'mass', massSail, 'faceColor', 'mirror','rA',[0;0;0],...
                     'sigmaS', [1 1], 'sigmaD', [0.0 0.0], 'sigmaA', [0.0 0.0], 'emissivity', [0.3, 0.3],...
                     'vertex',v ,'face', [1 2 3; 1 3 4], 'inside', 0 );
BuildCADModel( 'add component', m );

Spacecraft

%-----------
m = CreateComponent( 'make', 'box','name','Bus','body',1,...
                     'mass', massBus, 'faceColor', 'gold foil','rA',[0;0;0],...
                     'x', 1,'y', 1, 'z',1,  'inside', 1 );
BuildCADModel( 'add component', m );


%------------------------------------------------------------------

Export

%------------------------------------------------------------------
if( createFiles )
  g = BuildCADModel( 'get cad model' );
  cd(FindDirectory('SailData'));
  SaveStructure( g, sprintf('SailGEO_%d',massBus) );
end

3D View

%--------
DrawSCPlanPlugIn( 'initialize', g );
AddAxes(0.6*sailWidth,[],[],gcf)


%--------------------------------------
% PSS internal file version information
%--------------------------------------

ans = 
  Figure (2: 3D Vehicle Plan) with properties:

      Number: 2
        Name: '3D Vehicle Plan'
       Color: [1 1 1]
    Position: [500 320 460 460]
       Units: 'pixels'

  Use GET to show all properties

Published with MATLAB® R2014b