156B Week 4

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

Accomplishments from Previous Week

• • Sensing Method has been narrowed down to the flex sensor

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

• • Select a Harness type (Marcos, Cory)

  • Design the one sided joint (Marcos)

  • Meet with Prosthetist Jesus Mendoza (Team)

  • Look into the Rechargeable battery (Ethan)

  • Code for the Flex sensor (Ethan, Jose)

  • Analysis on Center of mass for the harness (Cory, Marcos)

  • Look for software for the scanner (Jose)

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

• • Consider incorporating a harness into the design (4/22 - researched into different harness designs and talked to Tony Mendoza, prosthetist who specializes with upper body extremities)

  • Look into Aliplast for the material used along with brace (4/22 - Jesus Mendoza demonstrated different materials common in orthosis)

  • Design the joint that would be transferable for any size. (4/22 - designed the joint and 3d printed a prototype of it)

  • Avoid using EMG. (4/22 - Started the flex sensor method more)

  • Look into Lithium Ion battery, battery casing 

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

• • Actuator not a motor (Prof. T in person 4/18)

    • changed the terminology on the slides

  • Force diagram for motor (Prof. T in person 4/18)

    • Used MATLAB to iterate through different positions to obtain a force plot. 

  • Look at previous projects for EMG sensors (Prof. T in person 4/18)

    • made a key decision to rule out EMG sensors

    • Reached out to Professors to discuss EMG sensors. 

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

• • Good feedback on demo (4/18 via email)

  • improve quality of slides (4/18 via email)

  • include slides. (4/18 via email)

Risks and Areas of Concern

• • Making of the Harness

  • Selecting an activation method for the sensor

  • battery safety

Resources or Information Required but not Available

Schedule

• • Will meet with Jesus Mendoza and Max's family to get a 3D scan of his arm to make an accurate brace for him on 4/29

    • Will also scan his upper body to start thinking about harness size

  • Narrow down a method to trigger the actuation of the motorized orthosis by 4/27

  • Start proof of Concept on 4/23

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • Amount spent as of 4/24 - $564.62

  • Remaining as of 4/24 - $935.38

Progress on Report and Webpage

• • Report Progress - Finished Applicable Standards section of Report