156B Week 1

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

• • This week's progress follows the feedback from the risk reduction presentation. Parts were ordered over spring break to build and test the feasibility of the servo and DC motor designs. With all of the parts, rough prototypes of each design were constructed and tested on the arm test bed. 

Accomplishments from Previous Week

• • Researched and Ordered parts

  • Conceptualized different design ideas

  • Researched and built actuation methods on a micro-servo using different sensors. 

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

• • Clean up prototypes.

    • Flex sensor, pressure sensor (Jose)

    • Servo Motor (Ethan)

  • Look for areas of improvement in prototypes

    • Signal noise - Muscle sensor (Ethan), Flex sensor (Jose)

  • Test bed refinement (Marcos)

  • Narrow down design options and start focus on one design  (Team) 

  • Establish workspace (Team) 

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

• • Comments from Sponsor:

    • Keep load off the patient's arm. 

    • Try and keep the device weight going through the shoulder and the trunk.

    • Motivate Max and his involvement in the project.

  • Our Actions 

    • Design and fabrication of pulley prototype to satisfy this constraint.

    • Tested 

    • Created multiple demonstrations for Max to visualize actuation methods.

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

• • Spend some money, and build 2-3 Prototypes in a quick fashion, to understand some of the conflicts that may arise.

  • Build a testbed.

  • Consider many different design solutions.

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

• • None e-mailed yet

Risks and Areas of Concern

• • Signal from the muscle sensor seems to be noisy. 

  • Designing the device to keep load off of the arm as much as possible. 

Resources or Information Required but not Available

Schedule

• • Describe upcoming milestone

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • Bearings ($8)

  • Servo ($12)

  • Muscle Sensor ($37)

  • Flex Sensor ($13)

  • NiMH Battery ($12)

  • Total Spent: $82

  • Amount Remaining: $ 1,418

Progress on Report and Webpage

• • Completed the Individual Component Analysis