Week 3

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

A design has been finalized and modeled, and it now needs to be created via purchasing and manufacturing.

Accomplishments from Previous Week

Design selected to proceed with initially.
CAD Improved to incorporate motors and remove interferences.
Bill of Materials completed for selected design.
Parts of design report completed.
Gears were 3D Printed to test.
Solidworks Simulation validated vertical stabilization of pendulum at our specifications.
Purchases were not made, as we decided it was best to discuss with our sponsor before purchasing, and we did not have time to make purchases after our Friday meeting before the weekend started, where orders are not processed for some of the parts.
Toolpaths were initially begun, but modifications to the design made these manufacturing processes obsolete.

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

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

In-Person, 4/14:

The sponsor wanted us to proceed with the simpler of our two designs, which we have done.
The speed of direction change was accepted as meeting requirements.
The sponsor recommended finding an alternative to using a belt drive for one of our systems, and so gears were chosen as an alternative.
The sponsor recommended attempting simulating vertical stabilization on solidworks simulation to validate the expected good parameters. This was done, and our specifications created vertical stabilization, but reducing frequency did not produce stabilization, as expected.

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

In-Person, 4/10:

The instructor thought it would be a good idea to progress with both designs. After speaking with our sponsor, he confirmed that both designs would be good, but that we should make significant progress with our simpler design first.
The method for changing the amplitude in the rotating crank design was not clear. We will change the method of changing amplitude to be more visually intuitive. This could be done by increasing the number of holes to shange the pin position in, or by adding a screw adjustment mechanism.

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

4/10 Presentation Comments Summary:

Good visuals/animations/organization.
I would recommend an ODrive v3.6 for a brushless ESC. You can get a knockoff one on aliexpress for ~$100 and they have built in closed loop feedback to achieve a target rotational velocity. You would need to buy an encoder too like this: https://odriverobotics.com/shop/cui-amt-102
Improve the description of the project and purpose, the background was done too fast.
Give presentation a theme.

Risks and Areas of Concern

The main risk and concern that prevent you from accomplishing your goal. Try not to put minor concerns in here.

Safety when testing the design is a concern, with very high speeds and accelerations present.
High friction in the slot-slider system could cause issues.
Vibration of the mechanism could cause fatigue and noise.

Resources or Information Required but not Available

List them here and the instructor will try to help you.

Schedule

Describe upcoming milestone, Update Gantt chart, Budget (list amount spent and amount remaining)