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Project Xpedition Is the Product of Purdue University‟S Aeronautical and Astronautical Engineering Department Senior Spacecraft Design Class in the Spring of 2009

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Project Xpedition Is the Product of Purdue University‟S Aeronautical and Astronautical Engineering Department Senior Spacecraft Design Class in the Spring of 2009 92 Project Xpedition Purdue University AAE 450 Spacecraft Design Spring 2009 Contents 1 – FOREWORD ........................................................................................................................................... 5 2 – INTRODUCTION ................................................................................................................................... 7 2.1 – BACKGROUND .................................................................................................................................... 7 2.2 – WHAT‟S IN THIS REPORT? .................................................................................................................. 9 2.3 – ACKNOWLEDGEMENTS .....................................................................................................................10 2.4 – ACRONYM LIST .................................................................................................................................12 3 – PROJECT OVERVIEW ....................................................................................................................... 14 3.1 – DESIGN REQUIREMENTS ...................................................................................................................14 3.2 – INTERPRETATION OF DESIGN REQUIREMENTS ...................................................................................18 3.3 – DESIGN PROCESS ..............................................................................................................................19 3.4 – RISK AND COST ANALYSIS ................................................................................................................22 4 – RESULTS ............................................................................................................................................... 25 5 – MISSION CONFIGURATION 100G PAYLOAD ............................................................................. 27 5.1 – SYSTEM OVERVIEW ..........................................................................................................................28 5.2 – LAUNCH VEHICLE .............................................................................................................................31 5.2.1 – Launch Vehicle Selection .........................................................................................................31 5.2.2 – Earth Parking Orbit Selection .................................................................................................33 5.2.3 – Attitude Determination in LEO ................................................................................................35 5.3- LUNAR TRANSFER ..............................................................................................................................37 5.3.1 – Structure ...................................................................................................................................37 5.3.2 – Mission Operations ..................................................................................................................47 5.3.3 – Propulsion on the Orbital Transfer Vehicle .............................................................................51 5.3.4 – Attitude .....................................................................................................................................56 5.3.5 – Communication ........................................................................................................................60 5.3.6 – Thermal Control .......................................................................................................................67 5.3.7 – Power .......................................................................................................................................69 5.4 – LUNAR DESCENT ..............................................................................................................................74 5.4.1 – Structures .................................................................................................................................74 5.4.2 – Mission Operations ..................................................................................................................82 5.4.4 – Attitude Control .......................................................................................................................93 5.4.5 – Communication ........................................................................................................................95 5.4.6 – Thermal Control .......................................................................................................................98 5.4.7 – Power .....................................................................................................................................104 5.5 – LOCOMOTION ..................................................................................................................................109 5.5.1 – Structures/Integration ............................................................................................................110 5.5.2 – Propulsion ..............................................................................................................................115 5.5.3 – Communications ....................................................................................................................117 5.5.4 – Thermal Control .....................................................................................................................120 5.5.5 – Power .....................................................................................................................................121 5.5.6 – Mission Operations ................................................................................................................123 5.6 – MISSION INTEGRATION ...................................................................................................................126 5.7 – RISK ANALYSIS ...............................................................................................................................132 5.8 – COST ANALYSIS ..............................................................................................................................133 6 – MISSION CONFIGURATION 10KG PAYLOAD .......................................................................... 134 6.1 – SYSTEM OVERVIEW ........................................................................................................................135 6.2 – LAUNCH VEHICLE ...........................................................................................................................138 6.2.1 – Launch Vehicle/Site................................................................................................................138 6.2.2 – Earth Parking Orbit Selection ...............................................................................................139 6.2.3 – Attitude determination in LEO ...............................................................................................140 6.3 – LUNAR TRANSFER ...........................................................................................................................141 6.3.1 – Structure .................................................................................................................................141 6.3.2 – Mission Operations ................................................................................................................145 6.3.3 – Propulsion on the Orbital Transfer Vehicle ...........................................................................147 6.3.4 – Attitude ...................................................................................................................................148 6.3.5 – Communication ......................................................................................................................150 6.3.6 – Thermal Control .....................................................................................................................151 6.3.7 – Power .....................................................................................................................................152 6.4 – LUNAR DESCENT ............................................................................................................................155 6.4.1 – Structures ...............................................................................................................................155 6.4.2 – Mission Operations ................................................................................................................163 6.4.3 – Propulsion ..............................................................................................................................165 6.4.4 – Attitude Control .....................................................................................................................171 6.4.5 – Communication ......................................................................................................................172 6.4.6 – Thermal Control .....................................................................................................................173 6.4.7 – Power .....................................................................................................................................175 6.5 – LOCOMOTION ..................................................................................................................................179
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