LEV ????

1. LEV ???? SPSM5910 Space Systems Integration

2. Agenda • Assumptions • KPPs • System Overview • Module descriptions • System block diagram • Functional diagrams • Internal Interfaces • Requirements • WBS • External Interfaces

3. Assumptions • Mission 0 complete • Delivery of support systems and LEV • Mission support equipment is on the lunar surface • Power supply • Small habitat • Fuel storage • Communication system • No crew quarters in the LEV

4. KPPs • LEVs shall be reusable • LEV shall dock with the OTV/LTV in low lunar orbit • LEV shall fulfill three mission types: fly cargo only, cargo and crew and crew only • LEV shall be capable of lunar ascent to and descent from low lunar orbit • Support and maintenance for the LEV on the lunar surface shall be minimal

5. System Overview • ???

6. Propulsion Module • System diagram • Functional diagrams • Internal Interfaces • Requirements

7. Propulsion Module System Diagram

8. Liftoff Functional Flow Departure of OTV from ISS comm. received Begin flight preparations on Lunar surface OTV enters Lunar orbit LEV countdown starts to achieve proper phase angle with OTV LEV computer upload with flight software-error checking commences LEV fueled with oxidizer on Lunar surface Perform mechanical system checks Lunar ground systems disconnect Pilot performs system checklist LEV Liftoff Pilot monitors system parameters LEV on approach to rendezvous-switch to docking functions LEV enters Lunar Orbit

9. Landing Functional Flow LEV thrusters fire for decent trajectory Departure from OTV LEV enters Lunar Orbit LEV thrusters fire to slow decent to pad Pilot performs LEV shutdown checklist LEV touchdown on pad Lunar ground systems reconnect Pilot performs system checklist Excess fuel/oxidizer removed to storage LEV moved to hanger Cargo/Crew removal operations commence

10. Cargo Module • System block diagram • Functional diagrams • Internal Interfaces • Requirements

11. Crew Module • System block diagram • Functional diagram • Internal Interfaces • Requirements

12. Crew Module System Diagram

13. Establish communications with OTV Begin video monitoring of docking interface Engage manual thruster controls Seat crew compartment docking ring with OTV docking ring Connect with docking guide LEV engages docking locks Confirm docking lock with OTV Confirm ground with OTV Electrically ground LEV to OTV Check pressure match between cabins Begin rendezvous activities Open compartment doors OTV Docking Functional Flow

14. Crew Module Interfaces • Service Module • Propulsion control • Sensors • Cargo containers • Transfer control • Latch control • Sensors • OTV docking • Mechanical interface • Power interface • Communications • OTV • ISS • Earth • Lunar base • Lunar base • Power interface

15. WBS • ???

16. WBS Level 2 – Facilities-Earth Based

17. WBS Level 2 – Facilities-Lunar Based

18. WBS Level 2 – Facilities- Cost Savings • Consolidate Testing Facilities • By co-locating the acoustic, thermal, propulsion, and vacuum test facilities, a reduction of technicians with similar functions can be achieved • Reduces transport time, cost, and risk • Reduces time required to complete test program • Additional savings to overall program since LEV will use many of the same components as the OTV, so they can both use this same consolidated facility • Co-locate Engineering and Manufacturing • Provides for better coordination and integration of these two major functions • Reduction in production costs and schedule risks • Reduced problem resolution time during production • Minimize Lunar Maintenance • Provide a high level of diagnostic function to the LEV systems • Provide redundancy in systems • Design for quick LRU replacement in space suit environment (fixed cost vs. recurring maintainer costs) • Automate Cargo Handling • Reduces manpower required on the lunar surface and supporting costs for that manpower • Reduces risk of human losses due to accidents • Lunar Base Communication Satellite(s) • Lower cost than a lunar surface facility, especially if manned • Provides LEV communications to lunar base when out of line of sight • Higher reliability than surface equipment since not subjected to lunar dust environment

19. WBS Level 2 – System Engineering

20. External Interfaces • Lunar Outpost Support Services a. Maintenance interfaces i. Fueling ii. Supply iii. Supplemental power b. Repair interfaces i. Component replacement ii. Evolutionary upgrades c. Diagnostic/Health interfaces i. System monitoring ii. Digital maintainer log d. Storage i. Hanger • Lunar Environment a. Dust b. Meteor protection c. UV/Radiation protection d. Static/Grounding • Space Environment a. Solar Radiation b. Micro Meteorites c. Ambient Temperature d. High Energy Particles e. Charged Particles