156B Week 3

Week 3 Progress Report

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

• • Prototype linkage assembly completed

  • Finalizing float test

  • Completed second revision of full jellyfish assembly

Accomplishments from Previous Week

• • Modeled for printing the fin-ray effect to transfer motion to tentacles (Michael)

  • Researched dynamic seals to waterproof actuator: Rotational motion or a bellows (Trevor)

  • Made decision on battery to use (Ciara)

  • Ordered battery (Damian)

  • Completed version of full jellyfish CAD assembly (Ciara)

  • Researched battery charger (Damian)

  • Printed & assembled complete linkage assembly (Damian)

  • Modeled equations for electromagnetic actuation (Trevor)

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

• • Model housing setup (we want prototype ready to be printed) (stretch)(Ciara)

  • Consult Tom or Ian about construction float and temperature test (Damian)

  • Test tentacle prototype (Damian leads others will help/be there)

  • Verify tentacle’s full-size/how it will fit together (Michael)

  • Reassess Gantt Chart and update (Trevor)

  • Test actuation temperature (Damian leads and others will help/be there)

  • Order or borrow Li-po battery charger (Damian)

  • Order the camera (Damian)

  • Start looking into the coding camera with openCV (Everyone)

  • Familiarize with RaPi and develop presentation for rest of team (Everyone)

  • Print tentacles (Michael)

  • Build an electromagnet or Look into buying one (Trevor)

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

• • Try to make it as small as possible (can we make the dome smaller?)

  • Worried about sealing the actuator from its surroundings

  • Wants tentacles to be flexibly attached (no rotating joint)

  • Make integration of optical equipment easy if possible

  • Wasn’t very keen on electromagnetic actuation

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

• • Look into flexure joints

  • Look into electromagnetic actuation

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

• • Environmental impact of materials in design (4/4/2016)

  • Keeping knowledge of absolute angle quaternions or euler angles (4/4/2016)

Risks and Areas of Concern

• • Air-Water interface/sealing technique (& its longevity)

Resources or Information Required but not Available

• • Pool access/swimwear

  • Food

Schedule

• • Upcoming Milestones:

    • Design Test/Proof of Concept

Budget (list amount spent and amount remaining)

• • Total Spent: $239 Total Remaining: $2,261

  • Battery - $60

Progress on Report and Webpage

• • Did required report sections

  • Updated appropriate sections with new information/files