156B Week 5

Week 5 Progress Report

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

• • Testing actuation methods

  • Determining what works and doesn’t

Accomplishments from Previous Week

• • Constructed and designed housing and mounts for linear actuator testing (Damian)

  • Prepped test for wire pulling actuation (Ciara)

  • Bought dome (Ciara)

  • Got material and pieces for testing/observing double o-ring seal and diaphragm (Trevor)

  • Printed and revamped the Miga Motor oil resevoir (Michael)

  • Set up the Raspberry Pi (Michael)

  • Tested aquatic pumps as steering mechanism (Trevor)

  • Looked into magnetic actuation feasibility and buying magnets (Trevor)

  • Worked on testing system (Everyone)

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

• • Setup Raspberry Pi and test actuators (Everyone)

  • Buy and machine (for testing) gears for steering mechanism (Ciara)

  • Finish ordering things like magnets, electromagnets, another dome, another battery (Damian)

  • Update the Gantt Chart (Trevor)

  • Eliminate designs for actuation (Everyone)

  • Resize components to fit inside a dome (Ciara)

  • Install OpenCV on RPi (Michael)

  • Program RPi to run stepper motors (Michael)

  • Document testing and update website (Michael)

  • Contact other groups with RPi (Michael as lead with others)

  • Do calculations of force and power or magnet actuation and wire actuation (Trevor)

  • Add remaining parts to CAD for final design (Ciara)

  • Look into equations to replace linkages with flexures (Damian)

  • CAD the magnetic actuation design (Damian)

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

• • None

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

• • Have a lot on your plate

    • Pushing forward with testing the actuators to move past it

  • Worried about power consumption

    • Looked into the power consumption of each actuator type

  • Calculate friction forces on the o-ring seal

    • Got Tom and Evan’s help to make a test double o-ring

  • Talk to someone in rov field about double o-rings

    • Haven’t done it yet

  • Consider eliminating things by workability

    • Still testing to compare workability

  • Steering concerns with buoyancy and center of mass distances

    • Looking into resizing/reconfiguring layout to fit dome better

  • Makes it look pretty but make it functional

    • Putting aside the fin-ray until function has been demonstrated

  • Want access ports

    • Looking into purchasable ports

  • Come up with primary and secondary goals

    • Going to talk with Jules about it

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

• • Joe - look into automotive and plumbing for corrugated pipe sections (4/20/2016)

  • Oscar - It is really cool. Simple is better (4/22/2016)

Risks and Areas of Concern

• • Time and purchases

  • Implementing controls on Raspberry Pi (lack of experience)

Resources or Information Required but not Available

• • Weekend access to design studio (Sunday and Saturday)

Schedule

• • Upcoming Milestones

    • Building actuated prototype

    • Proof of concept

    • Build wire prototype

Budget (list amount spent and amount remaining)

• • Total Spent: $516.99 Total Remaining: $1983.01

  • SD Card $48.58

  • Dome $19

Progress on Report and Webpage

• • Updated report with revised sections

  • Uploaded CAD models and budget information

  • Updated Gantt chart?