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2018 8

Doctoral Committee:

Professor Chang Don Kee, Chair

Professor Jai-Ick Yoh

Professor Chan Gook Park

Professor In-Seuck Jeung

Senior Assistant Professor Takaya Inamori

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2018 6

2018 8

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I

II

III

Table of Contents

Abstract ............................................................................................................. I

List of Tables ......................................................................................................... VII

List of Figures ........................................................................................................ IX

Chapter 1 Introduction ......................................................................................... 1

1.1. Background ................................................................................................. 2

1.2. Motivation................................................................................................... 7

1.2.1. SNUSAT-1/1b ..................................................................................... 7

1.2.2. SNUSAT-2 .......................................................................................... 9

1.3. Literature Review ....................................................................................... 9

1.3.1. Differential drag .................................................................................. 9

1.3.2. High specific impulse thruster ........................................................... 13

1.3.3. High-thrust thruster ........................................................................... 15

1.3.4. Requirements for novel CubeSat orbit maneuver .............................. 17

1.4. Contribution .............................................................................................. 19

1.5. Dissertation outline ................................................................................... 21

Chapter 2 Interaction between Magnetic Actuator and Space Environment .. 22

2.1. Magnetic Plasma Drag .............................................................................. 22

2.1.1. Literature Review .............................................................................. 22

2.1.2. Space Plasma Environment ............................................................... 23

2.1.3. Magnetic Field Surrounding a Satellite ............................................. 28

2.1.4. Charged Particle Motion in Electric and Magnetic Fields................. 30

IV

2.1.5. Particle-In-Cell Simulation ................................................................ 32

2.2. Geomagnetic Torque ................................................................................ 38

Chapter 3 Methodology ..................................................................................... 41

3.1. Plasma Drag Constellation Concept ......................................................... 41

3.2. Analytical Method .................................................................................... 44

3.3. Numerical Method .................................................................................... 49

3.3.1. Constellation Deployment Simulator ................................................ 50

3.3.2. Attitude Simulator ............................................................................. 60

Chapter 4 Plasma Drag Constellation ................................................................ 65

4.1. General Aspects of Plasma Drag Constellation Time ............................... 65

4.2. Parametric Study of Plasma Drag Constellation ....................................... 65

Chapter 5 Plasma Drag Constellation Feasibility Analysis ............................... 72

5.1. Magnetic Moment of a Magnetic Actuator on a CubeSat ........................ 72

5.2. Perturbation of Right Ascension of the Ascending Node ......................... 74

5.3. Example of a four-CubeSat plasma drag constellation ............................. 78

Chapter 6 Geomagnetic Torque Mitigation ....................................................... 81

6.1. Transition Characteristics of Magnetic Plasma Drag due to Polarity

Switching............................................................................................................. 81

6.2. Effect of High-Frequency Polarity Switching .......................................... 83

6.3. Practical Consideration on High-Frequency Switching ............................ 93

Chapter 7 Conclusions ....................................................................................... 95

4.1. Summary ...................................................................................................... 95

4.2. Future work ................................................................................................ 100

V

4.2.1. In-depth study of disturbance torque cancellation............................... 100

4.2.2. Advanced simple-IRI model development .......................................... 101

4.2.3. Large MTQ interface development ..................................................... 101

Appendix Analytical solution of magnetic plasma drag ....................................... 102

Bibliography ......................................................................................................... 105

......................................................................................................... 114

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VII

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1

Chapter 1

2

1.1.

3

XI-V (1U)

cm

1 kg

SNUSAT-2 (3U)

cm

2.85 kg

SNUSAT-1/1b (2U)

cm

1.9 kg

4

CubeSatsLaunched Each Year CubeSatsby Mission Type

798 Total

5

6

7

1.2.

1.2.1.

8

9

1.2.2.

1.3.

1.3.1.

10

11

12

13

1.3.2.

14

15

1.3.3.

Electronics (0.2 U) Thruster headNeutralizer

16

17

1.3.4.

18

19

1.4.

20

21

1.5.

22

Chapter 2

2.1.

2.1.1.

23

2.1.2.

24

25

26

27

28

2.1.3.

29

x

y

Relative

plasma flow

30

2.1.4.

31

32

2.1.5.