Matlab System Model

Mathematical model of the ASTRAEUS-01 spacecraft and its subsystems.

Interface Control Document

ADCS

mode	quantity	mathematical variable name	model variable name	justification
input	moment of inertia	$...$	...	required for attitude control calculations
output	attitude	$...$	...	used in effective area calculations
output	position	$...$	...	used in effective area calculations

EPS

mode	quantity	mathematical variable name	model variable name	justification
input	temperature	$...$	...	required for battery performance calculations
input	attitude	$...$	...	required for effective area calculations
input	position	$...$	...	required for effective area calculations
output	heat dissipated by power electronics	$Q_{EPS}$	...	used in thermal balancing calculations
output	electrical power delivered to payload camera module	$P_{PC}$	...	used in computational load calculations
output	electrical power delivered to payload data handling module	$P_{PDH}$	...	used in computational load calculations
output	electrical power delivered to communications module	$P_{comms}$	...	used in computational load calculations

Other Computational Electronics

Payload Camera

mode	quantity	mathematical variable name	model variable name	justification
input	electrical power delivered	$P_{PC}$	...	required for computational load calculations
output	heat dissipated by payload camera module	$Q_{PC}$	...	used in thermal balancing calculations

Payload Data Handler

mode	quantity	mathematical variable name	model variable name	justification
input	electrical power delivered	$P_{PDH}$	...	required for computational load calculations
output	heat dissipated by payload data handling module	$Q_{PDH}$	...	used in thermal balancing calculations

Communications Module

mode	quantity	mathematical variable name	model variable name	justification
input	electrical power delivered	$P_{comms}$	...	required for computational load calculations
output	heat dissipated by communications module	$Q_{comms}$	...	used in thermal balancing calculations

Structures

mode	quantity	mathematical variable name	model variable name	justification
input	uniform temperature	$T$	...	required for thermal cycling calculations
output	moment of inertia	$...$	...	used in attitude control calculations

Thermal

mode	quantity	mathematical variable name	model variable name	justification
input	attitude	$...$	...	used in effective area calculations
input	position	$...$	...	used in effective area calculations & Earth's shadow check
input	heat dissipated by power electronics	$Q_{EPS}$	...	required for thermal balancing calculations
input	heat dissipated by payload camera module	$Q_{PC}$	...	required for thermal balancing calculations
input	heat dissipated by payload data handling module	$Q_{PDH}$	...	required for thermal balancing calculations
input	heat dissipated by communications module	$Q_{comms}$	...	required for thermal balancing calculations
output	uniform temperature	$T$	...	used in battery performance and thermal cycling calculations