156B Week 8

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

• • Working on analyzing: 

    • treads via testing two design groups:

      • rubber grousers 

      • metal spikes

    • spool

      • both passive and active designs

      • most likely will only be theoretical analysis 

  • Currently writing a guide for making a realistic burrow replica using piping 

Accomplishments from Previous Week

• • Tested a variety of tethers and whether the tank that has been used for testing could pull various tethers with or without added masses

  • decided on achievable deliverables that have been approved by the sponsors 

    • devised plan to accomplish these deliverables by this coming Friday 

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

• • Finish spool analysis

    • make a simple passive spool to test on the tank 

  • Test adding rubber grousers to tank treads

    • test for force that it can pull using a spring scale

    • run through burrow simulation testing site

  • Test adding metal spikes to treads 

    • test for pulling force using a spring scale 

    • test best design in burrow simulation testing site

  • Write a guide to making a realistic burrow simulation for the sponsors 

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

• • Met over Zoom on 5/21

  • They liked our ideas for deliverables 

  • recommended we add treads to the outsides of the current treads since no treads replacements that are feasible can ship in time 

  • They approved only have a theoretical analysis for the spool 

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

• • Met over Zoom on 5/21

  • Recommended that we focus on treads and how to keep them attached to the vehicle 

  • Stephen provided information on different tread types and ways to keep them attached better to the vehicle 

  • Recommended that we should look into metal spikes such as screws on the tank treads to increase traction 

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

• • N/A

Risks and Areas of Concern

• • A risk is that we have come up with ways to test increasing traction but not especially securing the treads on the vehicle better 

Resources or Information Required but not Available

• • Access to 3D printing in a short amount of time 

    • narrowed deliverables to avoid this 

Schedule

• • Milestones include: 

    • Spool analysis completed (5/29) 

    • Traction analysis completed (5/29)

    • Replica burrow report completed (5/29) 

    • Team members present to each other their final work on Friday (5/29)

    • Final presentation and report writing 

Budget (list amount spent and amount remaining)

• • Spent: $386.21

  • Amount remaining: $613.79

Progress on Report and Webpage

• • Submitting report draft 2 and will finalize webpage this week