1Mid term – Laser Swarm

Pruned Design Option Tree ADCS

2Mid term – Laser Swarm

Selected ADS concepts

1. Maryland Aerospace Inc. IMI-100 ADACS

2. Sun Sensors and a Star Tracker

3. GPS based attitude controlSources: http://www.cubesatkit.com/docs/datasheet/DS CSK ADACS 634-00412-A.pdf

Dr. Q.P. Chu. Spacecraft attitude dynamics and control, course notes

3Mid term – Laser Swarm

Trade-off ADS

Criteria Weight Factor

Concept 1 Concept 2 Concept 3

Accuracy 9 4 8 4

Size 7 2 6 4

Power 7 6 5 7

Price 3 3 5 4

Development 5 8 4 5

Weighted total

141 184 150

4Mid term – Laser Swarm

Winner ADS

Sources: Dr. Q.P. Chu. Spacecraft attitude dynamics and control, course notes

5Mid term – Laser Swarm

Selected ACS concepts

1. Thrusters

2. Reaction wheels and magnetic torquers

3. Maryland Aerospace Inc. IMI-100 ADACSSources: http://www.tno.nl

http://www.cubesatshop.comhttp://www.cubesatkit.com/docs/datasheet/DS_CSK_ADACS_634-00412-

A.pdf

6Mid term – Laser Swarm

Trade-off ADSCriteria Weight

FactorConcept 1 Concept 2 Concept 3

Rate 5 8 6 6

Accuracy 8 4 8 7

Size 7 2 6 5

Power 7 3 6 6

Price 3 2 8 7

Development 5 4 6 8

Weighted total

133 232 224

7Mid term – Laser Swarm

Winner ADS

Sources: Dr. Q.P. Chu. Spacecraft attitude dynamics and control, course notes

8Mid term – Laser Swarm

Selected Pointing Mechanism Concepts

1. Using the ADCS

2. Using two stepper motors

3. Using one axis reaction wheel and one stepper motor

9Mid term – Laser Swarm

Trade-off pointing mechanismCriteria Weight

FactorConcept 1 Concept 2 Concept 3

Pointing accuracy

10 2 8 6

Pointing rate 10 2 8 6

Added weight

4 8 2 5

Power 4 7 2 4

Influence 6 2 3 7

Complexity 6 8 2 6

Weighted total

208 221 228

10Mid term – Laser Swarm

Winner Pointing Mechanism