Contents

Design a 3U CubeSat with Tilted Wings

Specify data in the solarPanel field for CubeSatModel to define tilted wings.

See also RHSCubeSat, CubeSatModel, DrawCubeSat, DrawCubeSatSolarAreas, VOrbit, StructToText, QZero, Unit

%--------------------------------------------------------------------------
%   Copyright (c) 2017 Princeton Satellite Systems, Inc.
%   All rights reserved.
%--------------------------------------------------------------------------

disp('3U CubeSat with Tilted Wings');

3U CubeSat with Tilted Wings

Specify the solar panel geometry and construct the model

d                       = CubeSatModel( 'struct' );
d.massComponents        = 3;
d.solarPanel.dim        = [100 100 10];	% [side attached to cubesat, side perpendicular, thickness]
d.solarPanel.nPanels    = 2; % Number of panels per wing
d.solarPanel.rPanel     = [50 -50 0 0;0 0 50 -50;-150 -150 -150 -150]; % Location of inner edge of panel
d.solarPanel.sPanel     = [1 -1 0 0;0 0 1 -1;-1 -1 -1 -1];
d.solarPanel.cellNormal = Unit([1 -1 0 0;0 0 1 -1;1 1 1 1]); % Cell normal
d.solarPanel.sigmaCell  = [1;0;0];    % [absorbed; specular; diffuse]
d.solarPanel.sigmaBack  = [0;0;1];    % [absorbed; specular; diffuse]
d.solarPanel.mass       = 0.1;

[v, f, data] = CubeSatModel( '3U', d );
StructToText( data );

jD0:
	2.4552e+06
mass:
	5.39864
inertia (3,3):
	0.117895 	-0.000000 	0.000000 
	-0.000000 	0.098448 	0.000000 
	0.000000 	0.000000 	0.048872 
dipole (3,1):
	0.000000 	0.000000 	0.000000 
power: STRUCTURE
power.solarCellEff:
	0.29
power.effPowerConversion:
	0.8
power.solarCellArea (1,4):
	0.020000 
	0.020000 
	0.020000 
	0.020000 
power.solarCellNormal (3,4):
	0.707107 	-0.707107 	0.000000 	0.000000 
	0.000000 	0.000000 	0.707107 	-0.707107 
	0.707107 	0.707107 	0.707107 	0.707107 
power.consumption:
	0.5
power.batteryCapacity:
	100
surfData: STRUCTURE
surfData.cD:
	2.7
surfData.cM (3,1):
	0.000000 	0.000000 	-0.037114 
surfData.area (1,22):
	0.030000 
	0.030000 
	0.010000 
	0.030000 
	0.030000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
	0.010000 
surfData.nFace (3,22):
	1.000000 	0.000000 	0.000000 	-1.000000 	-0.000000 	-0.000000 	0.707107 	-0.707107 	0.707107 	-0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 	0.000000 	-0.000000 	0.000000 	-0.000000 	0.000000 	-0.000000 	0.000000 	-0.000000 
	0.000000 	1.000000 	0.000000 	-0.000000 	-1.000000 	-0.000000 	0.000000 	-0.000000 	0.000000 	-0.000000 	0.000000 	-0.000000 	0.000000 	-0.000000 	0.707107 	-0.707107 	0.707107 	-0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 
	0.000000 	0.000000 	1.000000 	-0.000000 	-0.000000 	-1.000000 	0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 	-0.707107 	0.707107 	-0.707107 
surfData.rFace (3,22):
	0.050000 	0.000000 	0.000000 	-0.050000 	-0.000000 	-0.000000 	0.100000 	0.100000 	0.200000 	0.200000 	-0.100000 	-0.100000 	-0.200000 	-0.200000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 
	0.000000 	0.050000 	0.000000 	-0.000000 	-0.050000 	-0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.100000 	0.100000 	0.200000 	0.200000 	-0.100000 	-0.100000 	-0.200000 	-0.200000 
	0.000000 	0.000000 	0.150000 	-0.000000 	-0.000000 	-0.150000 	-0.200000 	-0.200000 	-0.300000 	-0.300000 	-0.200000 	-0.200000 	-0.300000 	-0.300000 	-0.200000 	-0.200000 	-0.300000 	-0.300000 	-0.200000 	-0.200000 	-0.300000 	-0.300000 
surfData.att: STRUCTURE
surfData.att.type:
	'eci'
surfData.att.qLVLHToBody (4,1):
	1.000000 
	0.000000 
	0.000000 
	0.000000 
surfData.sigma (3,22):
	1.000000 	1.000000 	1.000000 	1.000000 	1.000000 	1.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 
	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 
	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 	0.000000 	1.000000 
surfData.planet:
   1

aeroModel:
	CubeSatAero
opticalModel:
	CubeSatRadiationPressure
atm: STRUCTURE
atm.aP:
	15
atm.f:
	176
atm.fHat:
	178.135
atm.fHat400:
	146.296
kWheels:
	[]
inertiaRWA:
	[]
tRWA:
	[]

Visualize the model

DrawCubeSat( v, f, data );
DrawCubeSatSolarAreas( data );

Check the RHS output with the model

Point the solar panels (+z) at the sun for the default epoch

uSun = SunV1(data.jD0);
q0 = U2Q( uSun, [0;0;1] );
x = [7000;0;0;0;VOrbit(7000);0;q0;0;0;0;0];
t = 0;
[~,dist,power] = RHSCubeSat( x, t, data );

StructToText( dist );
fprintf('Max solar power: %g W\n',power);


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

fOptical (3,1):
	0.000000 	0.000000 	0.000000 
tOptical (3,1):
	0.000000 	-0.000000 	-0.000000 
fAerodyn (3,1):
	0.000000 	-0.000002 	0.000000 
tAerodyn (3,1):
	0.000000 	0.000000 	0.000000 
tGG (3,1):
	-0.000000 	0.000000 	-0.000000 
tMag (3,1):
	-0.000000 	0.000000 	0.000000 
fTotal (3,1):
	0.000000 	-0.000002 	0.000000 
tTotal (3,1):
	0.000000 	0.000000 	-0.000000 
rho:
	4.08773e-13
bField (3,1):
	-0.000010 	0.000017 	-0.000012 

Max solar power: 18.5067 W

Published with MATLAB® R2016b