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GOALS

1. Complete mass budget
2. Detailed design of bus
   1. Mass reduction!!
3. Working low fidelity prototype of bus + integrated payload [3D printed with wires + fasteners]
4. Validation of some bus subassemblies with FEA simulations </aside>

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Mass Budget

• [ ] Ensure mass requirement (4.2 kg) is accurate
  • [ ] NASA DAS simulations with latest FINCH assembly configuration
• [ ] More accurate assessment of mass of each component, fasteners, wires, etc.
• [ ] Add proper margins </aside>

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Detailed Design of Bus

• [ ] Add thicker sections and holes to rails
• [ ] Figure out side panels
  • [ ] Where to put solar panels/antenna/cutouts
  • [ ] How to mount to rails
  • [ ] Add structural support to side panel boards
• [ ] Continue developing
  • [ ] Lower battery pack bracket
  • [ ] Star tracker bracket
  • [ ] Deploy switch mechanisms
  • [ ] GNSS antenna housing
• [ ] Add fasteners
• [ ] Figure out connections for all wires
• [ ] Mass properties requirements
  • [ ] Reduce mass to be under 4.2 kg with margin
  • [ ] Ensure center of gravity is within limits of geometric center </aside>

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Prototype

• [ ] Prototype all subassemblies
  • [ ] Assemble with fasteners + wires
• [ ] Assemble the subassemblies with payload
• [ ] Document all progress + assembly considerations </aside>

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FEA Simulations

• [ ] Mounting OBC + PAY boards - do they need more support? </aside>

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RISKS

1. Exceeding the mass requirement
   • Mass reduction efforts
   • Topology optimization - Cristhian’s Masters!
2. Center of gravity not close enough to geometric center
   • Multiple CAD models with different potential configurations
3. Unable to fit everything (wires, etc.) within volume allocation
   • Prototyping
   • Modelling wires in SolidWorks
4. Unable to survive launch environment in simulations
   • FEA simulations throughout
   • Learn best practices
5. Difficult to actually assemble
   • Prototyping </aside>