Overview of Status of Analysis, Design, Fabrication, Tests, etc.
A-frame was completed previous week, steel tube for pendulum arm and block for Woodruff key were machined this week
All other materials needed for mechanical structure are here or have been ordered
Accomplishments from Previous Week
Machined steel tube for pendulum arm and block for Woodruff key
Found out that electromagnetic disc brake would not be here in time, so ordered mechanical disc brake, and designed mounting setup
Ordered remaining materials for mechanical structure
Ordered electronics
Continued work on controls
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Machine remaining parts: brake mount, supports, Woodruff key cutout in shaft (Zhan, Derrick, Ky)
Wire electronics (Zhan, Derrick, Ky)
Finish control algorithm and begin testing (Chris)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
05/23/12 in person:
Looked over fabricated frame
Discussed alternative options for brake using available motors in component room
Bicycle disc brake with actuator to pull cable
High torque motor to apply force directly to shaft
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
05/21/12 after presentation:
Check stress concentration in shaft at Woodruff key cutout
Check inputs for pendulum arm bending simulation
Pololu motor driver is unreliable
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Risks and Areas of Concern
Original electromagnetic brake can not be used anymore, so we now have to use mechanical disc brake with slower response time
We already have the brake and actuator, and mounting setup has been designed, so we will be testing the brake
Resources or Information Required but not Available
Schedule
Final Build
Code and test
Budget (list amount spent and amount remaining)
Spent: $1420
Remaining: $3480
Progress on Report and Webpage
Second draft of report was submitted for peer review
Second draft of webpage has been completed