156B Week 2

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • compression analysis of housing completed

  • Initial CAD of over all design completed

Accomplishments from Previous Week

• • CAD of major design components completed

  • Major components of system chosen and corresponding parts found in online stores

    • linear actuator

    • battery

    • thrusters

    • waterproof enclosure

    • electronics

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Major parts (listed above) ordered and received (Duncan)

  • Update budget with new purchases (Duncan)

  • Become informed on the mechanics of antenna and space needed, come up with a design to extend antenna above water (Hugo)

  • Have finalized design for inner metal structure and consult Ian/Tom to optimize design (Zach)

  • Configure Pi 3 as test run to become familiar with the Raspberry Pi environment (what is needed?), report back to team(Doris)

  • Piston hardware configuration and o-ring selection finalized with the help of Scripps(Michael)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Sponsor asked team for budget proposal instead of giving us one (4/6, email)

    • team came up with initial budget and organized in a spreadsheet with cost, quantity, and where to purchase items.

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • Progress report need to be more detailed. Should set more ambitious goals to get more things done (4/5, in person)

    • Put down more specific goals with measurable ends.

  • fail-safe mechanism: Use CO2 cannister

    • have not yet gotten to fail-safe mechanism design

    • potentially not as good as drop weight, because unit is long and might spin if CO2 is released quickly from the bottom.

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • none

Risks and Areas of Concern

• • Battery would not last long enough to satisfy design requirement

  • Budget negotiation may not go through if proposed with current rough estimate+budget padding

  • Difficult finding time for whole team to meet and work on things (split into subgroups?)

  • Sponsor doesn't like to meet, problematic for team when designs need to be discussed in regards to functional requirements

Resources or Information Required but not Available

• • Raspberry Pi zero wireless power consumption while controlling thrusters, linear actuator, sensors, and recording data constantly.

Schedule

• • Launching into testing and data collection phases as soon as parts arrive

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • $2000 (proposed to sponsor)

Progress on Report and Webpage

• • Report outline done by Friday

  • Webpage progress report updated

  • Additional references added to webpage for future considerations