Development of a Cold Gas Propulsion System for the ... - SSL - MIT
Development of a Cold Gas Propulsion System for the ... - SSL - MIT Development of a Cold Gas Propulsion System for the ... - SSL - MIT
4.1.4 Flow Equations .................................................................................................................... 57 4.1.5 Summary of the Model ....................................................................................................... 60 4.1.6 Example Model Run ............................................................................................................ 62 4.1.7 Major Conclusions Drawn from the Model......................................................................... 65 4.2 COTS Component Selection ........................................................................................................ 66 4.2.1 Thruster Solenoid Valves .................................................................................................... 67 4.2.2 Regulator ............................................................................................................................. 69 4.3 Nozzle Design .............................................................................................................................. 70 5 Single-Stream Component Testing ............................................................................................ 73 5.1 Objectives.................................................................................................................................... 73 5.2 Testing Setup and Procedures .................................................................................................... 74 5.2.1 Instrumentation .................................................................................................................. 74 5.2.2 Laboratory Nitrogen Cylinders ............................................................................................ 76 5.2.3 High Side of CGSE ................................................................................................................ 78 5.3 Results ......................................................................................................................................... 80 6 Full Eight-Thruster Flight System ............................................................................................... 83 6.1 Hardware Construction ............................................................................................................... 83 6.2 Interfacing the CGSE to the TALARIS Flight Computer ............................................................... 87 6.3 Static Characterization Testing ................................................................................................... 89 6.3.1 Thruster Identification ........................................................................................................ 90 6.3.2 Static Test Stand .................................................................................................................. 90 6.3.3 Thrust Output Characterization .......................................................................................... 92 6.3.4 Pulse Testing and CGSE Control Circuit Improvement ........................................................ 99 6.4 Controller Implementation ....................................................................................................... 104 8
7 Ongoing and Future Work ....................................................................................................... 106 7.1 Validation Testing ..................................................................................................................... 106 7.1.1 Horizontal Traverse and Roll Testing ................................................................................ 106 7.1.2 Vertical Test Stand ............................................................................................................ 110 7.1.3 6-DOF Flight Testing .......................................................................................................... 112 7.1.4 Summary of Validation Testing Efforts ............................................................................. 113 7.2 Improved Characterization of Thrust Levels Throughout a Hop .............................................. 114 7.3 Possible Upgrades ..................................................................................................................... 115 8 Conclusion .............................................................................................................................. 118 Works Cited ................................................................................................................................... 122 9
- Page 1: Development of a Cold Gas Propulsio
- Page 5: Abstract The TALARIS (Terrestrial A
- Page 9: Table of Contents List of Figures .
- Page 14 and 15: Figure 6-6. Identification of thrus
- Page 17 and 18: Notation Acronyms and Abbreviations
- Page 19 and 20: N newton Pa pascal psi pounds per s
- Page 21 and 22: 1 Introduction The TALARIS (Terrest
- Page 23 and 24: the idea of hopping was born, and i
- Page 25 and 26: However, as stated before, this doe
- Page 27 and 28: Figure 2-3. Diagram of ACAT lander
- Page 29 and 30: An alternate approach to resolving
- Page 31 and 32: accurate conditions for testing GNC
- Page 33 and 34: Ballistic hops tend to use less pro
- Page 35 and 36: 2.3.2 Comparison of Cold Gas and Mo
- Page 37 and 38: Handling propellant There are sever
- Page 39 and 40: and if the cold gas system was foun
- Page 41 and 42: 3 TALARIS CGSE Design Framework Aft
- Page 43 and 44: Figure 3-1. Scaling of TALARIS terr
- Page 45 and 46: (3) Providing attitude control Ther
- Page 47 and 48: Figure 3-2 also shows the body coor
- Page 49 and 50: 4 Modeling and Flow Control Compone
- Page 51 and 52: 4.1.2 Rocket Propulsion Equations L
- Page 53 and 54: variables in equation (4-8) deal wi
- Page 55 and 56: equations. Equation (4-10) was then
- Page 57 and 58: that of helium (0.227 MPa = 32.9 ps
- Page 59 and 60: thruster solenoid valve, and chambe
4.1.4 Flow Equations .................................................................................................................... 57<br />
4.1.5 Summary <strong>of</strong> <strong>the</strong> Model ....................................................................................................... 60<br />
4.1.6 Example Model Run ............................................................................................................ 62<br />
4.1.7 Major Conclusions Drawn from <strong>the</strong> Model......................................................................... 65<br />
4.2 COTS Component Selection ........................................................................................................ 66<br />
4.2.1 Thruster Solenoid Valves .................................................................................................... 67<br />
4.2.2 Regulator ............................................................................................................................. 69<br />
4.3 Nozzle Design .............................................................................................................................. 70<br />
5 Single-Stream Component Testing ............................................................................................ 73<br />
5.1 Objectives.................................................................................................................................... 73<br />
5.2 Testing Setup and Procedures .................................................................................................... 74<br />
5.2.1 Instrumentation .................................................................................................................. 74<br />
5.2.2 Laboratory Nitrogen Cylinders ............................................................................................ 76<br />
5.2.3 High Side <strong>of</strong> CGSE ................................................................................................................ 78<br />
5.3 Results ......................................................................................................................................... 80<br />
6 Full Eight-Thruster Flight <strong>System</strong> ............................................................................................... 83<br />
6.1 Hardware Construction ............................................................................................................... 83<br />
6.2 Interfacing <strong>the</strong> CGSE to <strong>the</strong> TALARIS Flight Computer ............................................................... 87<br />
6.3 Static Characterization Testing ................................................................................................... 89<br />
6.3.1 Thruster Identification ........................................................................................................ 90<br />
6.3.2 Static Test Stand .................................................................................................................. 90<br />
6.3.3 Thrust Output Characterization .......................................................................................... 92<br />
6.3.4 Pulse Testing and CGSE Control Circuit Improvement ........................................................ 99<br />
6.4 Controller Implementation ....................................................................................................... 104<br />
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