Integrated System Build & Test
Table of Contents
Team Vision for Integrated System Build & Test PhaseDuring this phase our team planned to assemble the entire system and have it working independent of the monitor, keyboard, and mouse. Additionally, the packaging would be completed. Upon the completion of these items, testing to the engineering requirements would begin. In reality, the team spent the majority of the phase integrating the system and awaiting the arrival of crucial components. This left little time for testing the system so some of the planned testing will occur in the final phase.
Test Results Summary
System WeightOur complete packaging with all components assembled was weighed to be 181 g. This equates to just under 6.4 ounces which satisfies our maximum 9 ounce requirement.
Packaging Stress AnalysisA static stress analysis was completed using Creo Simulate to determine how our packaging made of PLA material will react to compressive loads. It was found that with a constrained bottom, the packaging was able to withstand up to 250lbf of compression on the top, right, and back sides simultaneously while not exceeding the flexural yield strength of 145 MPa at any point.
Force Sensor CalibrationIn order to obtain a weight output from the force sensors, our test subject (Nick) wore a shoe with a sensor embedded in the sole while standing on a scale, so voltage output from the sensor and weight from the scale could be compared. This data was used to create a linear trend between weight applied and voltage output. This equation was used to get a weight output directly from the force sensor. Then, the test procedure was repeated to confirm that the weight output from the force sensor and from the scale were consistent.
- Access to raspberry pi charging port
- 3D printing improvements (reduce warping, increase smoothness, etc.)
- Find XYZ coordinates instead of distances
Risk and Problem Tracking
While most risks became less likely, the chances of the system not functioning properly have increased due to recent discoveries regarding the Juicebox Zero and Decawave API.
Main problems facing team:
- Debugging the Raspberry Pi with Juicebox Zero attached risks breaking the Juicebox Zero.
- Incomplete API provided by Decawave disallowing a constant update of location tracking.
Plans for next phaseTeam goals The goals for the final phase include testing on the system, implementing feedback, and completing the paper and project. The bulk of the work needed to be done is testing to engineering requirements and optimizing the system to customer desires. Individual Responsibilities to Achieve Team Goals
- Optimize packaging and shoe attachment. (6 hours)
- Draft and complete support documentation. (6 hours)
- Complete team paper and poster. (6 hours)
- Assist team with additional testing as needed. (6 hours)
- Create draft of poster (4 hours).
- Perform tests on system once integrated (heat) (2 hours).
- Write MSD technical paper and assist with instruction manual (5 hours).
- Order final round of components (3 hours).
- Get server up and running with Hrishi and be able to send and access data real time instead of just sending a file and reading it later (6 hours)
- Correct the location function library error for the pi (4 hours)
- Help Martine finalize packaging for ideal port holes. (1 hour)
- Continue to solder and desolder components as needed for testing and build. (3 hours)
- Retest charging and battery life when server is setup and system is fully wireless. (3 hours)
- Test system per test plans.
- Solder new power switch to the juicebox & ensure solder connections cannot be removed.
- Draft & Finalize system instruction manual.
- Assemble the on-foot system & create replacement pressure sensors.
- Rectify the x,y,z coordinates for DWM1001 from the received code from support.
- Rectify minor networking issue related to file transfer on Ad-Hoc network.