P 18001 Glove Based Wearable Interface v 2

P 18001 -Glove Based Wearable Interface v. 2 10 -12 -17

Agenda ● Review of Phase 1 outcomes ● Team Vision for Phase 2 ● Benchmarking ● Functional Decomposition ● Feasibility Questions and Preliminary Tests ● Morphological Chart and Concept Selection ● Systems Architecture ● Concept Design Details ● Pugh Chart

Phase 1 Outcomes ● Met with customer (Willow Baker) ○ Discussed proposed changes from 17001 ○ Determined no large changes in customer requirements ● Risk Assessment ● Customer Requirements ● Engineering Requirements ● Use Cases ○ Main and three secondary cases ● Constraints

Team Vision-Phase 2 What we intended to do: ● Begin to solidify overall design and feasibility ○ Research, testing, analyzing last year’s prototype ● Create a clear Functional Decomposition ○ Further define main use case, determine main/sub functions ● Create Morphological Chart and Pugh chart ○ Narrow down concepts, focus on selection of concepts ● Complete thorough testing of 17001 prototype What we accomplished: ● Functional Decomposition

Benchmarking

Functional Decomposition Configuration Branch Out of Project Scope Send Branch Off Branch

Feasibility Questions 1) Is the typing process feasible for the user to learn? 2) Will the prototype fit within budget? 3) Is the prototype able to weigh less than an average phone? 4) Will the prototype impede hand movement? 5) Does the prototype have a feasible completion date (End of MSD 2)? 6) Will there be enough gestures to complete tasks? 7) How can we ensure robustness? 8) How much memory do we need for LUT for ASCII characters? 9) What battery life would be needed for the prototype to remain competitive? 10)How do we ensure gesture to text is consistent? 11)Will the design and gestures be ergonomically safe? After choosing key questions, preliminary answers and further test plans were determined. Working Document

Morphological Chart - Google Doc.

Concept Selection Criteria Ease of learning curve Fits within budget Weight of device Size of device Number of available gestures Ease of actuation Speed of message delivery Distraction level Steps to power on Can be completed in MSD 1 and 2

Concept Selection (cont’)

Systems Architecture

Concept 1 - Strain Gauge Strap

Concept 2 - Accel Slap-Strap

Concept 3 - Relay Glove

Concept 4 - Relay Strap

Concept 5 - Relay Strap QWERTY

Concept 6 - EMG Strap

Pugh Diagram

Cost Analysis

Risk Assessment

Testing Objectives ● Determine the areas of design integrity from the previous prototype ● Determine areas that need improvement on the previous prototype and compare them to our benchmarks ● Take away concepts and systems ideas to implement during the next phase

Previous Prototype Testing Day 1 a: Electrical Observations Benefit Concept Back Button on hand turns device on + On Button Bluetooth readily disconnected during testing - BT Selection Feedback motor useful for diagnostics + Vibrate Breadboard easily removable X X Paired with Android, i. OS, Computer + Ease of Use Package-configured as input device + Cb Structure SEND action literally sends "SEND" - X

Previous Prototype Testing Day 1 b: Electro-Mechanical Observations Benefit Concept SHIFT changed LED color + LED Feedback Pointer finger string stuck in box - X MIddle finger string inconsistent/jammed - X

Previous Prototype Testing Day 2: Software ● Algorithm from previous iteration has a delay of at least 550 ms per character ○ MCU selection and code optimization will allow us to bring that down ○ Future work: determine Teensy minimum operation delay from datasheet and benchmark across other microcontrollers ● Storage is around 30 k. B ○ Can be brought down through more efficient variable storage (10 k. B just in variables) ○ Future work: access off-board memory size constraints

Takeaways ● Main points ○ Benchmarking is accomplished so that it can be used as reference in selecting the best concept and for testing analysis ○ Functional decomposition is done to make sure every idea is thought of before hitting the ground running because we want to be working on the best concept for success ○ Morphological chart is done to generate alternatives for each function before the Pugh Chart can be created ○ Pugh chart is created based on the selection criteria and is for us to look at so that we can pick the concept that best meet the customer’s needs ○ Feasibility is analyzed to make sure that the chosen concept is doable and is executed in time

Plan for Phase III ● Continuously update WBS as each task is completed ● Provide agenda for each meeting based on updated WBS for peak productivity WBS Document

Work Breakdown Structure

Questions?