156B Week 3

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

• • We have decided upon the design of our suspension arm pending the implementation of the electromagnetic brake system. Once we have purchased and received our electromagnetic brakes, we will be able to finalize our arm design. The laryngoscope holder, user interface, and rail mount are areas of the design that still need to be addressed.

Accomplishments from Previous Week

• • We have decided on anodized aluminum as our material for fabrication of the arm. This decision was based on stress analysis done on a Solidworks model of the arm design. We have also done research to figure out which electromagnetic brakes need to be purchased. Purchasing of electromagnetic brakes and raw aluminum material will be done by the end of the week.

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

• • Purchasing of both the aluminum and electromagnetic brakes (Team)

  • User interface layouts (Janak)

  • Assembly and fabrication of arm (Team)

  • Possible working prototype to show to sponsor by beginning of 5th week (Team)

  • Design laryngoscope holder and table mount in Solidworks (Team)

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

• • Our sponsor confirmed that aluminum can be used in the operating room without any trouble. (4/19 via email)

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

• • Fine controls are critical, and this could be a high risk issue. (4/19 - Design Proposal comments)

  • Once the laryngoscope prototype is set up, measure the inadvertent drift force caused by the laryngoscope cables

  • Make sure the locking mechanism does not cause undesirable motion

  • Show figure of complete system on the operating table

  • Vibration is more of a concern than the stress on the arm

  • Check if there is a way to keep the arm horizontal

  • Need figures to follow the Matlab analysis

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

• • Start developing pseudo-code (comments made at Design Proposal Presentation 4/19/12)

  • Presentation ran a bit too long

  • CAD of ideas with patient and table included - visualize overall schematic

  • Hard to follow the data/graphs in the presentation

  • Address the possibility of vibrations

  • Failure mode and effect analysis

Risks and Areas of Concern

• • Vibrations of the arm

  • Inadvertent movement of the arm caused by cables

  • Inadvertent movement of the arm caused by 

Resources or Information Required but not Available

• • Video of entire procedure

Schedule

• • Describe upcoming milestone

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • No money spent

Progress on Report and Webpage

• • Updated and password protected