156B Week 2

MAE 156B Week 2 Progress Report

Project Title: Locomotion Monitoring System for Mouse Cognitive Behavioral Task

Sponsor Name: Bloodgood Lab and Hnasko Lab

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

• • Starting Analysis for Raspberry Pi micro controller (how to obtain mouse data, etc)

  • Design of systems is finalized and CAD drawings are in progress

  • Fabrication of systems for risk reduction is completed; next steps are to start fabricating the larger system

  • Tests of the horizontal air bearing concluded that the linear bearing is a better choice. Tests of actual systems have not begun yet

  • Discussed machining methods for the large parts required by Bloodgood’s system

Accomplishments from Previous Week

• • Constructed horizontal air bearing prototype for risk reduction

  • From the risk reduction, we concluded that using a linear bearing would be more optimal

  • Finished CAD for frame, head mount, top plate, and side walls

  • Laser cut foam disk for smaller system and tested the linear bearing

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

• • Misumi parts purchased, fasteners, stock and sheet metal purchased (David, Philip)

  • Raspberry Pi configured and sensor testing (Jeff)

  • Purchase and test variety of linear bearings. (Michal)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments

• • Sponsors are excited about current design and project progress

  • Discussed size constraints of large Bloodgood system 3’x6’

  • Discussed mounting of mouse head fixture

Instructor Comments from Last Meeting and Actions Taken to Address these Comments

• • Comment: Consider linear bearing rather than radial air bearing

            Action: Fabricated and tested both bearing systems with static analysis resulting in the implementation of a linear bearing in the final design

• • Comment: Consider Calibration routine for optical encoder

Action: No current action has been taken

Risks and Areas of Concern

• • Weight of foam core disks may be too much for available flow rate

  • Noise level at the air inlet may be too high for mouse

Resources or Information Required but not Available

• • We still need to know the dimensions of the Bloodgood Lab’s air table, specifically the spacing of the screw holes and the thread specification of these holes.

Budget (list amount spent and amount remaining)

• • $97.56 spend

  • $3402.44 remaining

Progress on Report and Web Page

• • Budget page added

  • Team member profiles made

Schedule

Major Milestones:

• • Final design of air chamber: Bloodgood  4/6, Hnasko  4/13

  • Build air chamber:Bloodgood 4/20, Hnasko  4/25

  • Final Base design: 4/8

  • Hardware completed: 5/4