1. AOCS_A4 Reaction Wheels Jean-MatthieuCOUSIN jean-matthieu.cousin@insa-lyon.fr National Institute of Applied Sciences (INSA) Lyon, FRANCE European Student Moon Orbiter - Phase B workplan

2. AOCS_A4 : Reactionwheels Outline : Actual Design Dynacon Micro Wheel 1000 Workplan What do we have to do now ? Simulation Conclusion European Student Moon Orbiter - Phase B workplan

3. Spacecraft : needdifferent attitudes AOCS_A4 : Reactionwheels AOCS : Sensors Actual Design Workplan software Simulation Conclusion MRW European Student Moon Orbiter - Phase B workplan

5. Minimize power drain while maintaining redundancy

6. Include angular rate and temperature sensors

10. Power consumption : 10 W max (9W +1W)

11. Speed range : +/- 10,000 RPM

12. Max Torque : 30 mN.m

13. Size : 129x 129x 88,5 mm

14. Mass : 1.3 kg

15. Include angular rate and temperature sensors AOCS_A4 : Reactionwheels Actual Design Workplan Simulation Conclusion European Student Moon Orbiter - Phase B workplan

16. Objective : Update the Excel Worksheet And check the MRW1000 with the current configuration. AOCS_A4 : Reactionwheels Requirements : SPEC from AOCS_A1 and the former requirements Actual Design Tools : Workplan EXCEL Simulation Comments : Conclusion Trywith the STRU team to perfectionate the Worksheet to add the new inertial data more easily. European Student Moon Orbiter - Phase B workplan

17. Objective : Put forward a partnershipwith INSA and buildourownWheels. AOCS_A4 : Reactionwheels Requirements : SPEC from AOCS_A1 and the former requirements EPS requirements Actual Design Tools : Workplan … Comments : Simulation Weneed to increaseour team, about to behighly capable in differentsubjects as electronic, software… Conclusion European Student Moon Orbiter - Phase B workplan

18. Objective : Decidewhichkind of electronic components weneed, whichkind of interfaces… AOCS_A4 : Reactionwheels Requirements : SPEC from AOCS_A1 and the former requirements OBDH and EPS requirements Actual Design Workplan Tools : Simulation … Comments : Conclusion It’s a major problemthatwe have to resolve. (for OBDH and EPS team) European Student Moon Orbiter - Phase B workplan

19. Objective : Convertour model on Catia file AOCS_A4 : Reactionwheels Requirements : Actual Design Tools : Workplan Catia Simulation Comments : Conclusion Shouldwe use a specific version of Catia? European Student Moon Orbiter - Phase B workplan

21. Momentum storage capacity allow us to maintain attitude during 24 hours before using thrusters to off-load the wheelsActual Design Workplan Validation Simulation Comments : Conclusion Conclusion European Student Moon Orbiter - Phase A review European Student Moon Orbiter - Phase B workplan

23. Momentum storage capacity allow us to maintain attitude during 24 hours before using thrusters to off-load the wheelsActual Design Workplan Matlab, Simulink Validation Simulation Comments : Conclusion Conclusion We have to talk about the simulation with the team in charge of it. European Student Moon Orbiter - Phase A review European Student Moon Orbiter - Phase B workplan

25. Momentum storage capacity allow us to maintain attitude during 24 hours before using thrusters to off-load the wheels

28. Momentum storage capacity allow us to maintain attitude during 24 hours before using thrusters to off-load the wheelsIntensityrequired Actual Design Workplan Validation Simulation Powerconsumption Temperature New rotation speed Conclusion Conclusion European Student Moon Orbiter - Phase A review European Student Moon Orbiter - Phase B workplan

30. Momentum storage capacity allow us to maintain attitude during 24 hours before using thrusters to off-load the wheelsActual Design Workplan Intensityrequired Validation Simulation Conclusion Conclusion New rotation speed European Student Moon Orbiter - Phase A review European Student Moon Orbiter - Phase B workplan

31. AOCS_A4 : Reactionwheels Answering Questions… Requirements Actual Design Validations Thankyou for your attention Conclusion European Student Moon Orbiter - Phase A review