Week 5

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

• • Design

    • Looking into gears

    • Looking into incorporating a lead screw

  • Tests

    • Redid our tests in an enclosed box

      • Reduce convection of air as much as possible

Accomplishments from Previous Week

• • Finished tests inside of an enclosure

  • Bought more Smooth On products

    • Ecoflex silicone

    • Skin pigmentation

    • Slacker

  • Cured more silicone samples

    • 1:1:1/4 of A:B:Slacker for Dragonskin

    • 1:1 of Dragonskin with pigmentation

    • 2 samples of Rebound 25

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

• • Finish first draft of Report (Johnson, Daniel, Allen, Stephanie)

  • Look into printed circuit board (Daniel, Allen)

  • Finish CAD of structure (Stephanie)

  • Finish fabrication of Prototype #1

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (2/7/2012)

• • Do a control with just silicone (nothing embedded)

    • Redid our test inside of an enclosure with just silicone

  • Have two matched pieces of silicone with different thicknesses

    • Created another silicone sample out of Ecoflex that was much thicker

  • Look into carbon fiber heating

    • Ordered two sheets of carbon fiber heating from eBay

  • Try to minimize the wiring and circuitry as much as possible

    • Looking into printed circuit board

  • Can we use silicone alone as a mattress?

    • Going to see if carbon fiber can provide uniform heat, and we'll look into silicone from there

  • Ten degree angle convex

  • Twenty degree angle concave

    • Incorporating it into design

  • Do not like the walls of Marwan's design

  • Want something in which we can access the baby

    • Redesigning prototype #2

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (2/7/2012)

• • Linear joints are not ideal;

  • They can jam

    • Looking into other ways to provide the opening/closing mechanism

      • Lead screw

      • Gears

  • Goal should be a 1 degree of freedom mechanism

    • Read up on Gruber's equation

    • Updating the design

      • Want to fix the middle portion

      • Want to incorporate a lead screw instead such as to reduce the amount of degrees of freedom

  • Explore different ways of having one degree of freedom

    • Gears

      • LaserCAMMed gears to get a physical model

    • Lead screw

      • Got a sample lead screw from the machine shop

Risks and Areas of Concern

• • Dr Kim wants something that provides a 3D response

    • Similar to a shiatsu rolling massage chair

  • How will we attach mattress to frame such that it maintains convex shape?

Resources or Information Required but not Available

• • What would be a good response for a baby?

  • (What feels good/comforting if you were a baby?)

    • No studies have been done according to Dr Kim

Schedule

• Describe upcoming milestone

  • • Week 6: Have functioning prototype for testing

• Update Gantt chart.

Budget (list amount spent and amount remaining)

• • Slacker: 19.43

  • Ecoflex: 199.74

  • Pig flesh tone: 17.88

  • TOTAL for the Week: 237.05

  • Remaining Budget = $1212.49 - 237.05  =  $975.44

Progress on Report and Webpage

• Report

  • Looked over guidelines for report

  • Downloaded template

  • Began filling out template

• Website

  • Added Weekly Report #5