thermal Class Reference

Provides a simple thermal model for a network of elements. More...

#include <thermal.h>

Inherits dsim_model.

Public Member Functions
void	initialize_data ()
	Initialize outlets and output variables. More...
void	initialization_complete ()
	Finish initialization.
void	complete_timestep ()
	Computation done after numerical integration.
void	initialize_timestep ()
	Computation done prior to numerical integration. More...
void	rhs (double t, double jd)
	Computation done during numerical integration. More...

Protected Attributes
States
dsim_variable	temperature_dsim
	Temperature states.
Inputs
dsim_variable	heater_on_dsim
	Heater pulsewidth command.
dsim_network *	power_network_dsim
Parent data
dsim_variable	position_dsim
	Parent spacecraft ECI position.
dsim_variable	quaternion_dsim
	Parent quaternion (from ECI to body)
dsim_variable	angle_appendage_dsim
	Appendage angle.
dsim_variable	u_appendage_dsim
	Appendage unit vector.
Outlets
dsim_variable	observer_dsim
	Reference center from SPICE.
dsim_variable	positionBody_dsim
	Planet positions from SPICE (including the sun)
dsim_variable	planetIndex_dsim
	SPICE planet index from SPICE.
Parameters
dsim_variable	alphaThermal_dsim
	Absorptivity (1,n)
dsim_variable	epsilonThermal_dsim
	Emissivity (1,n)
dsim_variable	areaThermal_dsim
	Area of elements (n,1)
dsim_variable	normalThermal_dsim
	Normal fo reach area (3,n)
dsim_variable	conductance_dsim
	Thermal conductance matrix (n,n)
dsim_variable	thermalMass_dsim
	Thermal mass (1,n)
dsim_variable	heater_flux_dsim
	Heater flux(1,n;.
dsim_variable	thermalModelFile_dsim
	Thermal model file.
dsim_variable	conductanceMatrixFile_dsim
	Conductance matrix file.
dsim_variable	bodyIndex_dsim
	Body index.
dsim_variable	heaterNode_dsim
	Heater node.

Detailed Description

Provides a simple thermal model for a network of elements.

It has heaters, a conductivity matrix and an interface to the outside. The sun is the only external heat source. External heat sources send messages with the heat value in watts and the node in an ml_matrix(1,2) [heat node]

The temperature is an integrated state.

Member Function Documentation

initialize_data()

void thermal::initialize_data

(

)

Initialize outlets and output variables.

Initialize the data for 10 elements.

Assumes a linear conductor model.

References alphaThermal_dsim, areaThermal_dsim, bodyIndex_dsim, conductance_dsim, conductanceMatrixFile_dsim, epsilonThermal_dsim, heater_flux_dsim, heater_on_dsim, heaterNode_dsim, normalThermal_dsim, observer_dsim, planetIndex_dsim, positionBody_dsim, temperature_dsim, thermalMass_dsim, and thermalModelFile_dsim.

initialize_timestep()

void thermal::initialize_timestep

(

)

Computation done prior to numerical integration.

Get the values for the coefficients, areas, and normals.

Also locate the sun in the connected planet index. The sun is body 10.

References planetIndex_dsim.

rhs()

void thermal::rhs	(	double	t,
		double	jd
	)

Computation done during numerical integration.

Compute the derivatives of the temperatures given the current position of the sun.

References angle_appendage_dsim, bodyIndex_dsim, heater_flux_dsim, heater_on_dsim, heaterNode_dsim, position_dsim, positionBody_dsim, quaternion_dsim, temperature_dsim, and u_appendage_dsim.

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The documentation for this class was generated from the following files:

• thermal.h
• thermal.cc