Build & Test Prep
Table of Contents
Team Vision for Build & Test Prep Phase
During this phase, the team goals were to test the build of our first hydraulic cylinder, finalize the design of the frame and materials to be used, evaluate our budget, and order all materials.
The team tested the completed first hydraulic cylinder, made adjustments, finalized concepts and material decisions for the framework and other subsystems of the device, and evaluated the budget to order materials.
The IRB Proposal for Human testing was approved, the signed Form C can be found here
Link to the current BOM can be found here
Test Plan Summary
The first hydraulic cylinder was built. The team attached it to a pressurized water source to test the functionality of the cylinder. The cylinder successfully worked with the water pressure from the wall moving the piston of the cylinder in.
To test for quality, the team used soapy water to cover any locations where there may be any air leaks. One minor leak was found near the threading of the cylinder shown by the air bubble.
Two Way Valve Test
Tubing was added to the cylinder to test the piston's up and down movement. A 3-way valve will replace this tubing on the final device. This tubing and valve test rig allowed the flow of water into and out of the cylinder to be tested.
A full video of the functional testing can be found here
The team also tested the stopping function of the piston during use. With the two way valve set-up, the piston can be stopped at any point during the raising or lowering process.
A full video of this testing can be found here
Other Testing Documents
Risk and Problem Tracking
The team updated the risk assessment spreadsheet with potential risks resulting from decisions made in the design development progress. The image below shows the updated portion of the risk assessment.
The entire risk assessment spreadsheet can be found here
To track problems, the team started a problem tracking spreadsheet. A portion of the tracker is shown below.
The full problem tracking document can be found here
Design Review Materials
Notes from the design review can be found here
Plans for next phaseBelow is a screenshot of a portion of the Gantt chart showing information and the timeline for the team's next steps.
The full MSD II Gantt chart can be found here
Links to each team members' Three Week Plan: