156B Week 5
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Several electronic enclosure prototypes were printed, with each one being modified to correct problems
Conducted tests with purchased motors
Completed the Proof of Concept Presentation
Accomplishments from Previous Week
Printed an electronics enclosure that we believe is close to our final design. We also talked with Chris about using the higher quality printers and are planning to print out our final enclosure design soon.
Motors were able to be driven using the Tiny Circuits motor driver
Found a Bluetooth LE apps that lets us customize a controller. This will be useful for the initial testing stage.
We got all of the previous team's materials from the sponsor
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Print the final enclosure using the higher quality printer - team
Drive and control the motors correctly using the Bluetooth LE app - Juan and Chikeng
Conduct minimum battery capacity experiments - Pedro
Obtain Parylene from UCSD professor or experiment with PDMS for the conformal coating - Ganesha
Purchase components for the motor controller - team
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
All comments made on 5/2/19
Sponsor is happy with the progress we made with the enclosure prototypes
He gave us some suggestions for things to improve upon, like adding angles to ribs to reduce stress concentrations
Encouraged us to perform finite element analysis on the main sources of mechanical failure (like a force on the top of the device and shearing between the two pieces of the enclosure)
He wants us to catalog all of the previous team's components and send it to him along with our components
Wants us to perform heat transfer analysis to verify that the electronics enclosure will not generate significant heat
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
No instructor meeting this week due to Proof of Concept Presentation
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
A students asked about how we would be able to measure the heat generated by the battery. We said that we would use analytical calculations as well as experiments with a thermistor. Made on 5/2/19
Risks and Areas of Concern
Being able to accurately control a full elongation
Being able to accurately determine the battery capacity required under various conditions
Being able to accurately measure the heat generated by the electronics system
Resources or Information Required but not Available
Total energy consumption of the system
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
Spent: $0.00
Remaining: $1,318.18
Progress on Report and Webpage
Adding material to nearly every section of the report