Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Stilll have to solve high THD at higher frequencies
Have only tested final design with reference mic, need to try with MEMS if there's time
Making new plunger to test with, may or may not give better results
Accomplishments from Previous Week
Many tests on final prototype with reference mic
Proved repeatability of results after unclamping, repositioning, an re-clamping the piezo
Ran FE analysis on new piezo - shows resonant frequency at 29.6kHz, still can't explain THD spike and SPL drop
Possibly have a new working feedback VI
Ran a fine sweep with 20Hz increments - didn't show any unexpected spikes/drops
Made website prettier
Have an acrylic plate with power supply to mount all circuit components to, to clean up workspace
Made 3D printed stand-offs, module is more sturdy
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Finish report, poster, website - everyone
Executive summary and operator's manual - everyone
Solidworks and other pictures with annotations for report - Chris & Russ
Test feedback - Jenessa
Test with different O-rings and compare - Kyle & Russ
Print new plunger - Kyle
Stuff PCB - Kyle
Put on MEMS dish to test with MEMS maybe? - Chris
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Run tests of varying o-ring compressions (5%, 10%, 15%, 20%, 25%, 30%, 8-14% in 1% increments)
Run tests with softer O-rings
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Run analysis on plunger to find its resonant frequency
Run FE analysis on new piezo (done)
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Risks and Areas of Concern
THD at high end
Resources or Information Required but not Available
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
>1000 remaining
Progress on Report and Webpage
Need to add latest results to report