The matlab-system-model from guorbit

ADCS Model: Inside the box

Add internal structure to the ADCS block for use in the high level mathematical model of a 3U Spacecraft in low earth orbit.

Structure Model: Inside the box

Add internal structure to the Structural block for use in the high level mathematical model of a 3U Spacecraft in low earth orbit.

EPS Model: Inside the box

Add internal structure to the EPS block for use in the high level mathematical model of a 3U Spacecraft in low earth orbit.

Write library for effective area calculation

As specified in the ICD of #1, calculations of the effective area exposed by the spacecraft toward the Sun based on its position and attitude are repeated in both EPS and Thermal blocks.

To keep our model DRY (Don't Repeat Yourself), it would be nice to abstract away as much as possible while still keeping it adaptable to both EPS ($A_{eff}$ of solar panels) and Thermal ($A_{eff}$ of spacecraft) purposes.

Thermal Model: Inside the box

Add internal structure to the Thermal block for use in the high level mathematical model of a 3U Spacecraft in low earth orbit. The block must take: orbital elements or position_ECI, spacecraft attitude, and internally dissipated heat as inputs, and must provide the overall spacecraft temperature as an output.

*Note: Additionally, the model takes visible light absorptance and infrared emittance as design parameter inputs. These are independent of other systems.

(ICD) Set up initial black-box architecture for high-level mathematical model

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

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Interface Control Document

ADCS

EPS

Other Computational Electronics

Payload Camera

Payload Data Handler

Communications Module

Structures

Thermal

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