1. Week 7 Status Updates

2. Statement of Work: To design and prototype an attitude control system (ACS) for a Cube-Sat. This ACS will align the Cube-Sat with the desired direction as supplied by the Solar Sensor through magnetorquing using the Earth’s magnetic field. Our final deliverable will be a prototype and the control software. Attitude Control System Update 6-11-08

3. Questions for Vanderlei: Do we know the satellite’s location? (GPS, etc) Do we need translational force from the ACS, or just torque? Is some unintended translation along with the rotation okay? What is the intended time frame for the aligning the satellite? Or is there a torque requirement? How much tumbling is expected? Is it viable to use superconducting coils? Most CubeSats use copper wire, but this CubeSat may be different. What is our power budget in relationship to other instruments on the CubeSat? How much room are we allotted in the CubeSat for the ACS?

4. StartEndPeople Research Learn C for PICsnowlater deadlineLorraine and Dan Resources for Circuit Designnowlater deadline Existing SystemsnowFri 49Christina & Jacob Rotational PhysicsnowFri 49 E&M ReviewnowFri 49 Control MethodsMon 46later deadlineChristina and Jacob Satellite OrbitsnowFri 49 BrainstormFri 49 Model Theoretical CalculationsMon 46Fri 42 MATLABMon 46Fri 42 COMSOL - Optimizationlater Design Prototype Mechanical - Solidworks Software Design Circuit Design - Hardware Integration Everything working together connect with SOS Prototype order materials machining testing fix Final DeliverablesMon 4Fri 0 paper everything else

5. Statement of Work: To design and prototype an attitude control system (ACS) for a Cube-Sat. This ACS will align the Cube-Sat with the desired direction as supplied by the Solar Sensor through magnetorquing using the Earth’s magnetic field. Our final deliverable will be a prototype and the control software. Attitude Control System Update 6-12-08Day 50

6. Research: Response from Vanderlei answering our questions, includes information about existing systems: http://userpages.umbc.edu/~martins/cubesat/ACS/ Lecture from Steve on rotational physics (tensor style) and satellite physics Software Team continued learning of C++

8. Attitude Control System Update 6-13-08Day 49

9. Model Outline: Have satellite in magnetic field, model rotation due to coil torques Ignore orbit of satellite, separate problem Finish by Friday, allow for testing of control algorithms Environment/ Model Control Unit Angular Velocity, AttitudeCoil Currents

10. Task Delineation: MATLAB Modeling: Dan, Christina, Jacob Coil Design: Lorraine, Jacob Control Research: Dan, Lorraine, Christina Website: Christina Learn C Programming: Lorraine, Dan Model Verification: Jacob