156B Week 10

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

• • Pushing to have good documentation and get the jellyfish working better

  • The jellyfish has close to neutral buoyancy

Accomplishments from Previous Week

• • Wrote multithreaded code to run propulsion and steering  (Michael)

  • Bought brass weights (Damian)

  • Created tentacles out of gasket material and shim stock (Damian and Michael)

  • Machined steering weights and delrin spacer (Trevor)

  • Tested propulsion ability (All)

  • Checked complete assembly’s buoyancy/weight and adjusted accordingly (All)

  • Fixed issue allowing us to ssh over wifi (most likely problematic b/c UCSD wifi) (Michael)

  • Printed and sanded steering gear and spacer (Damian)

  • Completed draft of poster (Ciara)

  • Prepared final sponsor presentation (Ciara)

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

• • Work on documentation

    • User manual (Ciara)

    • Assembly drawings/BOM (Ciara)

    • Final report/website/poster (All)

  • Present the final design to Jules on Saturday (All)

  • Write code to get video working at the same time as propulsion (Michael)

  • Solder connections to RPi s.t. the camera will fit in (current connectors are too tall) (Michael)

  • Make the jellyfish neutrally buoyant (All)

    • Find out volume displaced by auv (Trevor)

    • Iterate through different amounts of weight

  • Work on making the propulsion work (All)

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

• • (in-person 5/24/2016) Not worried about report, get it working then the report...get it to swim

    • Focused on testing propulsion over the weekend

  • (in-person 5/31/2016) Is the camera running?

    • We have it able to run, but not at the same time as the motors. Working on this now.

  • (in-person 5/31/2016) What will be on the poster? How about a design tree or visual representation of the process?

    • Talk about adding a design tree w/ Dr. T and Pedro

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

• • Can you test with the dome open?

    • Fixed ssh/WIFI problem to avoid making this necessary

  • Do the buoyancy changing on the outside

    • Attached weights to the tentacles

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

• • Khoa (in-person 5/29/2016) - may want to have a rigid part to the rope actuation to help push on the back stroke.

    • Will pursue if other options fail

Risks and Areas of Concern

• • Steering ability

  • Propulsion power to move

  • Focus is on project outcome, not report/webpage (running out of time to make high quality ones)

  • Buoyancy

  • Ability to implement and test controls, ability to orient itself properly

Resources or Information Required but not Available

• • None

Schedule

• • Sat: final design review at sponsor’s location

  • Thurs/Fri: final documentation creation - report, website, and product manual

  • Wed/Thurs/Fri: test propulsion improvements

Budget (list amount spent and amount remaining)

• • Spent: $1082.03 Remaining: $1417.97

  • Purchased this week: hardware, $12.25

Progress on Report and Webpage

• • Amending report with corrections from Team 1

  • Webpage updated with poster graphics