156B Week 4

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

• • Submitted the Purchase Order for the Robo 3D Plus, and it is set to arrive on Wednesday 4/20

  • Borrowed a National Instruments miDAQ from a previous UCSD project at ATA and we are learning how to use it

Accomplishments from Previous Week

• • Got the approval to order a 3D printer

  • Laser cut pieces of acrylic

    • Housing to surround the testing jig

    • Mount for the motor

    • Iterations of two-piece wing design with varying hinge point distances

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

• • Acquire strain gages and assemble the test frame

  • Start collecting data as soon as possible, so we can learn what our signal looks like from the strain gage, and filter accordingly or adapt the test frame

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

• • David Gregg said to look into strain gage bridges (at ATA weekly meeting 4/12)

    • We are researching quarter and full bridges to see which one is best for our test set up

    • We will probably use the quarter bridge because we do not need super high precision for strain data acquired

  • David Gregg offered his help when we begin testing because he was a test engineer for 12 years

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 using load cells in place of strain gauges

  • Seek advice from sponsor (David Gregg) since he's a test engineer

  • In presentations, need to be more enthusiastic. Choose something to be enthusiastic about!

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

• • No presentation since last report

Risks and Areas of Concern

• Noise from test set-up that use strain gauges

• Flapping at frequency of bar could have inertia and momentum effects

Resources or Information Required but not Available

• • Nothing is unavailable, but still waiting on extra strain gauges

Schedule

• Acquire more strain gauges to experiment with

• Solidify testing design by adding extra bars to MAE 170 setup acquired 

Budget (list amount spent and amount remaining) 

• Purchased a 3D Printer that will be given to ATA after project completion

• $908.79 Total (Should have been around $820 if we had bought it)

• Idea is to be able to rapidly prototype without restraint

• Will also be able to introduce ATA to 3D Printing and 3D printers.

Progress on Report and Webpage